1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009 Rick Macklem, University of Guelph
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 /*
34 * These functions implement the client side state handling for NFSv4.
35 * NFSv4 state handling:
36 * - A lockowner is used to determine lock contention, so it
37 * corresponds directly to a Posix pid. (1 to 1 mapping)
38 * - The correct granularity of an OpenOwner is not nearly so
39 * obvious. An OpenOwner does the following:
40 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
41 * - is used to check for Open/Share contention (not applicable to
42 * this client, since all Opens are Deny_None)
43 * As such, I considered both extreme.
44 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes
45 * all Open, Close and Lock (with a new lockowner) Ops.
46 * 1 OpenOwner for each Open - This one results in an OpenConfirm for
47 * every Open, for most servers.
48 * So, I chose to use the same mapping as I did for LockOwnwers.
49 * The main concern here is that you can end up with multiple Opens
50 * for the same File Handle, but on different OpenOwners (opens
51 * inherited from parents, grandparents...) and you do not know
52 * which of these the vnodeop close applies to. This is handled by
53 * delaying the Close Op(s) until all of the Opens have been closed.
54 * (It is not yet obvious if this is the correct granularity.)
55 * - How the code handles serialization:
56 * - For the ClientId, it uses an exclusive lock while getting its
57 * SetClientId and during recovery. Otherwise, it uses a shared
58 * lock via a reference count.
59 * - For the rest of the data structures, it uses an SMP mutex
60 * (once the nfs client is SMP safe) and doesn't sleep while
61 * manipulating the linked lists.
62 * - The serialization of Open/Close/Lock/LockU falls out in the
63 * "wash", since OpenOwners and LockOwners are both mapped from
64 * Posix pid. In other words, there is only one Posix pid using
65 * any given owner, so that owner is serialized. (If you change
66 * the granularity of the OpenOwner, then code must be added to
67 * serialize Ops on the OpenOwner.)
68 * - When to get rid of OpenOwners and LockOwners.
69 * - The function nfscl_cleanup_common() is executed after a process exits.
70 * It goes through the client list looking for all Open and Lock Owners.
71 * When one is found, it is marked "defunct" or in the case of
72 * an OpenOwner without any Opens, freed.
73 * The renew thread scans for defunct Owners and gets rid of them,
74 * if it can. The LockOwners will also be deleted when the
75 * associated Open is closed.
76 * - If the LockU or Close Op(s) fail during close in a way
77 * that could be recovered upon retry, they are relinked to the
78 * ClientId's defunct open list and retried by the renew thread
79 * until they succeed or an unmount/recovery occurs.
80 * (Since we are done with them, they do not need to be recovered.)
81 */
82
83 #include <fs/nfs/nfsport.h>
84
85 /*
86 * Global variables
87 */
88 extern struct nfsstatsv1 nfsstatsv1;
89 extern struct nfsreqhead nfsd_reqq;
90 extern u_int32_t newnfs_false, newnfs_true;
91 extern int nfscl_debuglevel;
92 extern int nfscl_enablecallb;
93 extern int nfs_numnfscbd;
94 NFSREQSPINLOCK;
95 NFSCLSTATEMUTEX;
96 int nfscl_inited = 0;
97 struct nfsclhead nfsclhead; /* Head of clientid list */
98 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
99 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER;
100
101 static int nfscl_delegcnt = 0;
102 static int nfscl_layoutcnt = 0;
103 static int nfscl_getopen(struct nfsclownerhead *, struct nfsclopenhash *,
104 u_int8_t *, int, u_int8_t *, u_int8_t *, u_int32_t,
105 struct nfscllockowner **, struct nfsclopen **);
106 static bool nfscl_checkown(struct nfsclowner *, struct nfsclopen *, uint8_t *,
107 uint8_t *, struct nfscllockowner **, struct nfsclopen **,
108 struct nfsclopen **);
109 static void nfscl_clrelease(struct nfsclclient *);
110 static void nfscl_unlinkopen(struct nfsclopen *);
111 static void nfscl_cleanclient(struct nfsclclient *);
112 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
113 struct ucred *, NFSPROC_T *);
114 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
115 struct nfsmount *, struct ucred *, NFSPROC_T *);
116 static void nfscl_recover(struct nfsclclient *, bool *, struct ucred *,
117 NFSPROC_T *);
118 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
119 struct nfscllock *, int);
120 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
121 struct nfscllock **, int);
122 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *,
123 struct nfscldeleghead *);
124 static u_int32_t nfscl_nextcbident(void);
125 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **);
126 static struct nfsclclient *nfscl_getclnt(u_int32_t);
127 static struct nfsclclient *nfscl_getclntsess(uint8_t *);
128 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
129 int);
130 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *,
131 int, struct nfsclrecalllayout **, struct nfscllayout **);
132 static void nfscl_reldevinfo_locked(struct nfscldevinfo *);
133 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *,
134 int);
135 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *);
136 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
137 u_int8_t *, struct nfscllock **);
138 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
139 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
140 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
141 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
142 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
143 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *);
144 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
145 struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
146 struct nfscldeleg *, struct ucred *, NFSPROC_T *);
147 static void nfscl_totalrecall(struct nfsclclient *);
148 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
149 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
150 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
151 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
152 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
153 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
154 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
155 struct ucred *, NFSPROC_T *);
156 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
157 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
158 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *,
159 bool);
160 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t);
161 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
162 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
163 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int,
164 vnode_t *);
165 static void nfscl_freeopenowner(struct nfsclowner *, int);
166 static void nfscl_cleandeleg(struct nfscldeleg *);
167 static void nfscl_emptylockowner(struct nfscllockowner *,
168 struct nfscllockownerfhhead *);
169 static void nfscl_mergeflayouts(struct nfsclflayouthead *,
170 struct nfsclflayouthead *);
171 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t,
172 uint64_t, uint32_t, uint32_t, uint32_t, char *, struct nfsclrecalllayout *);
173 static int nfscl_seq(uint32_t, uint32_t);
174 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *,
175 struct ucred *, NFSPROC_T *);
176 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *,
177 struct ucred *, NFSPROC_T *);
178
179 static short nfscberr_null[] = {
180 0,
181 0,
182 };
183
184 static short nfscberr_getattr[] = {
185 NFSERR_RESOURCE,
186 NFSERR_BADHANDLE,
187 NFSERR_BADXDR,
188 NFSERR_RESOURCE,
189 NFSERR_SERVERFAULT,
190 0,
191 };
192
193 static short nfscberr_recall[] = {
194 NFSERR_RESOURCE,
195 NFSERR_BADHANDLE,
196 NFSERR_BADSTATEID,
197 NFSERR_BADXDR,
198 NFSERR_RESOURCE,
199 NFSERR_SERVERFAULT,
200 0,
201 };
202
203 static short *nfscl_cberrmap[] = {
204 nfscberr_null,
205 nfscberr_null,
206 nfscberr_null,
207 nfscberr_getattr,
208 nfscberr_recall
209 };
210
211 #define NETFAMILY(clp) \
212 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
213
214 /*
215 * Called for an open operation.
216 * If the nfhp argument is NULL, just get an openowner.
217 */
218 int
219 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
220 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
221 struct nfsclopen **opp, int *newonep, int *retp, int lockit, bool firstref)
222 {
223 struct nfsclclient *clp;
224 struct nfsclowner *owp, *nowp;
225 struct nfsclopen *op = NULL, *nop = NULL;
226 struct nfscldeleg *dp;
227 struct nfsclownerhead *ohp;
228 u_int8_t own[NFSV4CL_LOCKNAMELEN];
229 int ret;
230
231 if (newonep != NULL)
232 *newonep = 0;
233 if (opp != NULL)
234 *opp = NULL;
235 if (owpp != NULL)
236 *owpp = NULL;
237
238 /*
239 * Might need one or both of these, so MALLOC them now, to
240 * avoid a tsleep() in MALLOC later.
241 */
242 nowp = malloc(sizeof (struct nfsclowner),
243 M_NFSCLOWNER, M_WAITOK);
244 if (nfhp != NULL) {
245 nop = malloc(sizeof (struct nfsclopen) +
246 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
247 nop->nfso_hash.le_prev = NULL;
248 }
249 ret = nfscl_getcl(vp->v_mount, cred, p, false, firstref, &clp);
250 if (ret != 0) {
251 free(nowp, M_NFSCLOWNER);
252 if (nop != NULL)
253 free(nop, M_NFSCLOPEN);
254 return (ret);
255 }
256
257 /*
258 * Get the Open iff it already exists.
259 * If none found, add the new one or return error, depending upon
260 * "create".
261 */
262 NFSLOCKCLSTATE();
263 dp = NULL;
264 /* First check the delegation list */
265 if (nfhp != NULL && usedeleg) {
266 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
267 if (dp->nfsdl_fhlen == fhlen &&
268 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
269 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
270 (dp->nfsdl_flags & NFSCLDL_WRITE))
271 break;
272 dp = NULL;
273 break;
274 }
275 }
276 }
277
278 /* For NFSv4.1/4.2 and this option, use a single open_owner. */
279 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
280 nfscl_filllockowner(NULL, own, F_POSIX);
281 else
282 nfscl_filllockowner(p->td_proc, own, F_POSIX);
283 if (dp != NULL)
284 ohp = &dp->nfsdl_owner;
285 else
286 ohp = &clp->nfsc_owner;
287 /* Now, search for an openowner */
288 LIST_FOREACH(owp, ohp, nfsow_list) {
289 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
290 break;
291 }
292
293 /*
294 * Create a new open, as required.
295 */
296 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
297 cred, newonep);
298
299 /*
300 * Now, check the mode on the open and return the appropriate
301 * value.
302 */
303 if (retp != NULL) {
304 if (nfhp != NULL && dp != NULL && nop == NULL)
305 /* new local open on delegation */
306 *retp = NFSCLOPEN_SETCRED;
307 else
308 *retp = NFSCLOPEN_OK;
309 }
310 if (op != NULL && (amode & ~(op->nfso_mode))) {
311 op->nfso_mode |= amode;
312 if (retp != NULL && dp == NULL)
313 *retp = NFSCLOPEN_DOOPEN;
314 }
315
316 /*
317 * Serialize modifications to the open owner for multiple threads
318 * within the same process using a read/write sleep lock.
319 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations
320 * by acquiring a shared lock. The close operations still use an
321 * exclusive lock for this case.
322 */
323 if (lockit != 0) {
324 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) {
325 /*
326 * Get a shared lock on the OpenOwner, but first
327 * wait for any pending exclusive lock, so that the
328 * exclusive locker gets priority.
329 */
330 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL,
331 NFSCLSTATEMUTEXPTR, NULL);
332 nfsv4_getref(&owp->nfsow_rwlock, NULL,
333 NFSCLSTATEMUTEXPTR, NULL);
334 } else
335 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
336 }
337 NFSUNLOCKCLSTATE();
338 if (nowp != NULL)
339 free(nowp, M_NFSCLOWNER);
340 if (nop != NULL)
341 free(nop, M_NFSCLOPEN);
342 if (owpp != NULL)
343 *owpp = owp;
344 if (opp != NULL)
345 *opp = op;
346 return (0);
347 }
348
349 /*
350 * Create a new open, as required.
351 */
352 static void
353 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
354 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
355 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
356 struct ucred *cred, int *newonep)
357 {
358 struct nfsclowner *owp = *owpp, *nowp;
359 struct nfsclopen *op, *nop;
360
361 if (nowpp != NULL)
362 nowp = *nowpp;
363 else
364 nowp = NULL;
365 if (nopp != NULL)
366 nop = *nopp;
367 else
368 nop = NULL;
369 if (owp == NULL && nowp != NULL) {
370 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
371 LIST_INIT(&nowp->nfsow_open);
372 nowp->nfsow_clp = clp;
373 nowp->nfsow_seqid = 0;
374 nowp->nfsow_defunct = 0;
375 nfscl_lockinit(&nowp->nfsow_rwlock);
376 if (dp != NULL) {
377 nfsstatsv1.cllocalopenowners++;
378 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
379 } else {
380 nfsstatsv1.clopenowners++;
381 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
382 }
383 owp = *owpp = nowp;
384 *nowpp = NULL;
385 if (newonep != NULL)
386 *newonep = 1;
387 }
388
389 /* If an fhp has been specified, create an Open as well. */
390 if (fhp != NULL) {
391 /* and look for the correct open, based upon FH */
392 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
393 if (op->nfso_fhlen == fhlen &&
394 !NFSBCMP(op->nfso_fh, fhp, fhlen))
395 break;
396 }
397 if (op == NULL && nop != NULL) {
398 nop->nfso_own = owp;
399 nop->nfso_mode = 0;
400 nop->nfso_opencnt = 0;
401 nop->nfso_posixlock = 1;
402 nop->nfso_fhlen = fhlen;
403 NFSBCOPY(fhp, nop->nfso_fh, fhlen);
404 LIST_INIT(&nop->nfso_lock);
405 nop->nfso_stateid.seqid = 0;
406 nop->nfso_stateid.other[0] = 0;
407 nop->nfso_stateid.other[1] = 0;
408 nop->nfso_stateid.other[2] = 0;
409 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__));
410 newnfs_copyincred(cred, &nop->nfso_cred);
411 if (dp != NULL) {
412 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
413 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
414 nfsdl_list);
415 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
416 nfsstatsv1.cllocalopens++;
417 } else {
418 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, fhp, fhlen),
419 nop, nfso_hash);
420 nfsstatsv1.clopens++;
421 }
422 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
423 *opp = nop;
424 *nopp = NULL;
425 if (newonep != NULL)
426 *newonep = 1;
427 } else {
428 *opp = op;
429 }
430 }
431 }
432
433 /*
434 * Called to find/add a delegation to a client.
435 */
436 int
437 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
438 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
439 {
440 struct nfscldeleg *dp = *dpp, *tdp;
441 struct nfsmount *nmp;
442
443 KASSERT(mp != NULL, ("nfscl_deleg: mp NULL"));
444 nmp = VFSTONFS(mp);
445 /*
446 * First, if we have received a Read delegation for a file on a
447 * read/write file system, just return it, because they aren't
448 * useful, imho.
449 */
450 if (dp != NULL && !NFSMNT_RDONLY(mp) &&
451 (dp->nfsdl_flags & NFSCLDL_READ)) {
452 nfscl_trydelegreturn(dp, cred, nmp, p);
453 free(dp, M_NFSCLDELEG);
454 *dpp = NULL;
455 return (0);
456 }
457
458 /*
459 * Since a delegation might be added to the mount,
460 * set NFSMNTP_DELEGISSUED now. If a delegation already
461 * exagain ists, setting this flag is harmless.
462 */
463 NFSLOCKMNT(nmp);
464 nmp->nm_privflag |= NFSMNTP_DELEGISSUED;
465 NFSUNLOCKMNT(nmp);
466
467 /* Look for the correct deleg, based upon FH */
468 NFSLOCKCLSTATE();
469 tdp = nfscl_finddeleg(clp, nfhp, fhlen);
470 if (tdp == NULL) {
471 if (dp == NULL) {
472 NFSUNLOCKCLSTATE();
473 return (NFSERR_BADSTATEID);
474 }
475 *dpp = NULL;
476 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
477 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
478 nfsdl_hash);
479 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
480 nfsstatsv1.cldelegates++;
481 nfscl_delegcnt++;
482 } else {
483 /*
484 * Delegation already exists, what do we do if a new one??
485 */
486 if (dp != NULL) {
487 printf("Deleg already exists!\n");
488 free(dp, M_NFSCLDELEG);
489 *dpp = NULL;
490 } else {
491 *dpp = tdp;
492 }
493 }
494 NFSUNLOCKCLSTATE();
495 return (0);
496 }
497
498 /*
499 * Find a delegation for this file handle. Return NULL upon failure.
500 */
501 static struct nfscldeleg *
502 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
503 {
504 struct nfscldeleg *dp;
505
506 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
507 if (dp->nfsdl_fhlen == fhlen &&
508 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
509 break;
510 }
511 return (dp);
512 }
513
514 /*
515 * Get a stateid for an I/O operation. First, look for an open and iff
516 * found, return either a lockowner stateid or the open stateid.
517 * If no Open is found, just return error and the special stateid of all zeros.
518 */
519 int
520 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
521 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
522 void **lckpp)
523 {
524 struct nfsclclient *clp;
525 struct nfsclopen *op = NULL, *top;
526 struct nfsclopenhash *oph;
527 struct nfscllockowner *lp;
528 struct nfscldeleg *dp;
529 struct nfsnode *np;
530 struct nfsmount *nmp;
531 u_int8_t own[NFSV4CL_LOCKNAMELEN], lockown[NFSV4CL_LOCKNAMELEN];
532 int error;
533 bool done;
534
535 *lckpp = NULL;
536 /*
537 * Initially, just set the special stateid of all zeros.
538 * (Don't do this for a DS, since the special stateid can't be used.)
539 */
540 if (fords == 0) {
541 stateidp->seqid = 0;
542 stateidp->other[0] = 0;
543 stateidp->other[1] = 0;
544 stateidp->other[2] = 0;
545 }
546 if (vp->v_type != VREG)
547 return (EISDIR);
548 np = VTONFS(vp);
549 nmp = VFSTONFS(vp->v_mount);
550
551 /*
552 * For "oneopenown" mounts, first check for a cached open in the
553 * NFS vnode, that can be used as a stateid. This can only be
554 * done if no delegations have been issued to the mount and no
555 * byte range file locking has been done for the file.
556 */
557 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && fords == 0) {
558 NFSLOCKMNT(nmp);
559 NFSLOCKNODE(np);
560 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 &&
561 (np->n_flag & NMIGHTBELOCKED) == 0 &&
562 np->n_openstateid != NULL) {
563 stateidp->seqid = 0;
564 stateidp->other[0] =
565 np->n_openstateid->nfso_stateid.other[0];
566 stateidp->other[1] =
567 np->n_openstateid->nfso_stateid.other[1];
568 stateidp->other[2] =
569 np->n_openstateid->nfso_stateid.other[2];
570 NFSUNLOCKNODE(np);
571 NFSUNLOCKMNT(nmp);
572 return (0);
573 }
574 NFSUNLOCKNODE(np);
575 NFSUNLOCKMNT(nmp);
576 }
577
578 NFSLOCKCLSTATE();
579 clp = nfscl_findcl(nmp);
580 if (clp == NULL) {
581 NFSUNLOCKCLSTATE();
582 return (EACCES);
583 }
584
585 /*
586 * Wait for recovery to complete.
587 */
588 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
589 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
590 PZERO, "nfsrecvr", NULL);
591
592 /*
593 * First, look for a delegation.
594 */
595 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
596 if (dp->nfsdl_fhlen == fhlen &&
597 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
598 if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
599 (dp->nfsdl_flags & NFSCLDL_WRITE)) {
600 if (NFSHASNFSV4N(nmp))
601 stateidp->seqid = 0;
602 else
603 stateidp->seqid =
604 dp->nfsdl_stateid.seqid;
605 stateidp->other[0] = dp->nfsdl_stateid.other[0];
606 stateidp->other[1] = dp->nfsdl_stateid.other[1];
607 stateidp->other[2] = dp->nfsdl_stateid.other[2];
608 if (!(np->n_flag & NDELEGRECALL)) {
609 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
610 nfsdl_list);
611 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
612 nfsdl_list);
613 dp->nfsdl_timestamp = NFSD_MONOSEC +
614 120;
615 dp->nfsdl_rwlock.nfslock_usecnt++;
616 *lckpp = (void *)&dp->nfsdl_rwlock;
617 }
618 NFSUNLOCKCLSTATE();
619 return (0);
620 }
621 break;
622 }
623 }
624
625 if (p != NULL) {
626 /*
627 * If p != NULL, we want to search the parentage tree
628 * for a matching OpenOwner and use that.
629 */
630 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
631 nfscl_filllockowner(NULL, own, F_POSIX);
632 else
633 nfscl_filllockowner(p->td_proc, own, F_POSIX);
634 nfscl_filllockowner(p->td_proc, lockown, F_POSIX);
635 lp = NULL;
636 error = nfscl_getopen(NULL, clp->nfsc_openhash, nfhp, fhlen,
637 own, lockown, mode, &lp, &op);
638 if (error == 0 && lp != NULL && fords == 0) {
639 /* Don't return a lock stateid for a DS. */
640 if (NFSHASNFSV4N(nmp))
641 stateidp->seqid = 0;
642 else
643 stateidp->seqid = lp->nfsl_stateid.seqid;
644 stateidp->other[0] =
645 lp->nfsl_stateid.other[0];
646 stateidp->other[1] =
647 lp->nfsl_stateid.other[1];
648 stateidp->other[2] =
649 lp->nfsl_stateid.other[2];
650 NFSUNLOCKCLSTATE();
651 return (0);
652 }
653 }
654 if (op == NULL) {
655 /* If not found, just look for any OpenOwner that will work. */
656 top = NULL;
657 done = false;
658 oph = NFSCLOPENHASH(clp, nfhp, fhlen);
659 LIST_FOREACH(op, oph, nfso_hash) {
660 if (op->nfso_fhlen == fhlen &&
661 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) {
662 if (top == NULL && (op->nfso_mode &
663 NFSV4OPEN_ACCESSWRITE) != 0 &&
664 (mode & NFSV4OPEN_ACCESSREAD) != 0)
665 top = op;
666 if ((mode & op->nfso_mode) == mode) {
667 /* LRU order the hash list. */
668 LIST_REMOVE(op, nfso_hash);
669 LIST_INSERT_HEAD(oph, op, nfso_hash);
670 done = true;
671 break;
672 }
673 }
674 }
675 if (!done) {
676 NFSCL_DEBUG(2, "openmode top=%p\n", top);
677 if (top == NULL || NFSHASOPENMODE(nmp)) {
678 NFSUNLOCKCLSTATE();
679 return (ENOENT);
680 } else
681 op = top;
682 }
683 /*
684 * For read aheads or write behinds, use the open cred.
685 * A read ahead or write behind is indicated by p == NULL.
686 */
687 if (p == NULL)
688 newnfs_copycred(&op->nfso_cred, cred);
689 }
690
691 /*
692 * No lock stateid, so return the open stateid.
693 */
694 if (NFSHASNFSV4N(nmp))
695 stateidp->seqid = 0;
696 else
697 stateidp->seqid = op->nfso_stateid.seqid;
698 stateidp->other[0] = op->nfso_stateid.other[0];
699 stateidp->other[1] = op->nfso_stateid.other[1];
700 stateidp->other[2] = op->nfso_stateid.other[2];
701 NFSUNLOCKCLSTATE();
702 return (0);
703 }
704
705 /*
706 * Search for a matching file, mode and, optionally, lockowner.
707 */
708 static int
709 nfscl_getopen(struct nfsclownerhead *ohp, struct nfsclopenhash *ohashp,
710 u_int8_t *nfhp, int fhlen, u_int8_t *openown, u_int8_t *lockown,
711 u_int32_t mode, struct nfscllockowner **lpp, struct nfsclopen **opp)
712 {
713 struct nfsclowner *owp;
714 struct nfsclopen *op, *rop, *rop2;
715 struct nfsclopenhash *oph;
716 bool keep_looping;
717
718 KASSERT(ohp == NULL || ohashp == NULL, ("nfscl_getopen: "
719 "only one of ohp and ohashp can be set"));
720 if (lpp != NULL)
721 *lpp = NULL;
722 /*
723 * rop will be set to the open to be returned. There are three
724 * variants of this, all for an open of the correct file:
725 * 1 - A match of lockown.
726 * 2 - A match of the openown, when no lockown match exists.
727 * 3 - A match for any open, if no openown or lockown match exists.
728 * Looking for #2 over #3 probably isn't necessary, but since
729 * RFC3530 is vague w.r.t. the relationship between openowners and
730 * lockowners, I think this is the safer way to go.
731 */
732 rop = NULL;
733 rop2 = NULL;
734 keep_looping = true;
735 /* Search the client list */
736 if (ohashp == NULL) {
737 /* Search the local opens on the delegation. */
738 LIST_FOREACH(owp, ohp, nfsow_list) {
739 /* and look for the correct open */
740 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
741 if (op->nfso_fhlen == fhlen &&
742 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
743 && (op->nfso_mode & mode) == mode)
744 keep_looping = nfscl_checkown(owp, op, openown,
745 lockown, lpp, &rop, &rop2);
746 if (!keep_looping)
747 break;
748 }
749 if (!keep_looping)
750 break;
751 }
752 } else {
753 /* Search for matching opens on the hash list. */
754 oph = &ohashp[NFSCLOPENHASHFUNC(nfhp, fhlen)];
755 LIST_FOREACH(op, oph, nfso_hash) {
756 if (op->nfso_fhlen == fhlen &&
757 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
758 && (op->nfso_mode & mode) == mode)
759 keep_looping = nfscl_checkown(op->nfso_own, op,
760 openown, lockown, lpp, &rop, &rop2);
761 if (!keep_looping) {
762 /* LRU order the hash list. */
763 LIST_REMOVE(op, nfso_hash);
764 LIST_INSERT_HEAD(oph, op, nfso_hash);
765 break;
766 }
767 }
768 }
769 if (rop == NULL)
770 rop = rop2;
771 if (rop == NULL)
772 return (EBADF);
773 *opp = rop;
774 return (0);
775 }
776
777 /* Check for an owner match. */
778 static bool
779 nfscl_checkown(struct nfsclowner *owp, struct nfsclopen *op, uint8_t *openown,
780 uint8_t *lockown, struct nfscllockowner **lpp, struct nfsclopen **ropp,
781 struct nfsclopen **ropp2)
782 {
783 struct nfscllockowner *lp;
784 bool keep_looping;
785
786 keep_looping = true;
787 if (lpp != NULL) {
788 /* Now look for a matching lockowner. */
789 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
790 if (!NFSBCMP(lp->nfsl_owner, lockown,
791 NFSV4CL_LOCKNAMELEN)) {
792 *lpp = lp;
793 *ropp = op;
794 return (false);
795 }
796 }
797 }
798 if (*ropp == NULL && !NFSBCMP(owp->nfsow_owner, openown,
799 NFSV4CL_LOCKNAMELEN)) {
800 *ropp = op;
801 if (lpp == NULL)
802 keep_looping = false;
803 }
804 if (*ropp2 == NULL)
805 *ropp2 = op;
806 return (keep_looping);
807 }
808
809 /*
810 * Release use of an open owner. Called when open operations are done
811 * with the open owner.
812 */
813 void
814 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp,
815 __unused int error, __unused int candelete, int unlocked)
816 {
817
818 if (owp == NULL)
819 return;
820 NFSLOCKCLSTATE();
821 if (unlocked == 0) {
822 if (NFSHASONEOPENOWN(nmp))
823 nfsv4_relref(&owp->nfsow_rwlock);
824 else
825 nfscl_lockunlock(&owp->nfsow_rwlock);
826 }
827 nfscl_clrelease(owp->nfsow_clp);
828 NFSUNLOCKCLSTATE();
829 }
830
831 /*
832 * Release use of an open structure under an open owner.
833 */
834 void
835 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error,
836 int candelete)
837 {
838 struct nfsclclient *clp;
839 struct nfsclowner *owp;
840
841 if (op == NULL)
842 return;
843 NFSLOCKCLSTATE();
844 owp = op->nfso_own;
845 if (NFSHASONEOPENOWN(nmp))
846 nfsv4_relref(&owp->nfsow_rwlock);
847 else
848 nfscl_lockunlock(&owp->nfsow_rwlock);
849 clp = owp->nfsow_clp;
850 if (error && candelete && op->nfso_opencnt == 0)
851 nfscl_freeopen(op, 0, true);
852 nfscl_clrelease(clp);
853 NFSUNLOCKCLSTATE();
854 }
855
856 /*
857 * Called to get a clientid structure. It will optionally lock the
858 * client data structures to do the SetClientId/SetClientId_confirm,
859 * but will release that lock and return the clientid with a reference
860 * count on it.
861 * If the "cred" argument is NULL, a new clientid should not be created.
862 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
863 * be done.
864 * It always clpp with a reference count on it, unless returning an error.
865 */
866 int
867 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p,
868 bool tryminvers, bool firstref, struct nfsclclient **clpp)
869 {
870 struct nfsclclient *clp;
871 struct nfsclclient *newclp = NULL;
872 struct nfsmount *nmp;
873 char uuid[HOSTUUIDLEN];
874 int igotlock = 0, error, trystalecnt, clidinusedelay, i;
875 u_int16_t idlen = 0;
876
877 nmp = VFSTONFS(mp);
878 if (cred != NULL) {
879 getcredhostuuid(cred, uuid, sizeof uuid);
880 idlen = strlen(uuid);
881 if (idlen > 0)
882 idlen += sizeof (u_int64_t);
883 else
884 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
885 newclp = malloc(
886 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
887 M_WAITOK | M_ZERO);
888 }
889 NFSLOCKCLSTATE();
890 /*
891 * If a forced dismount is already in progress, don't
892 * allocate a new clientid and get out now. For the case where
893 * clp != NULL, this is a harmless optimization.
894 */
895 if (NFSCL_FORCEDISM(mp)) {
896 NFSUNLOCKCLSTATE();
897 if (newclp != NULL)
898 free(newclp, M_NFSCLCLIENT);
899 return (EBADF);
900 }
901 clp = nmp->nm_clp;
902 if (clp == NULL) {
903 if (newclp == NULL) {
904 NFSUNLOCKCLSTATE();
905 return (EACCES);
906 }
907 clp = newclp;
908 clp->nfsc_idlen = idlen;
909 LIST_INIT(&clp->nfsc_owner);
910 TAILQ_INIT(&clp->nfsc_deleg);
911 TAILQ_INIT(&clp->nfsc_layout);
912 LIST_INIT(&clp->nfsc_devinfo);
913 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
914 LIST_INIT(&clp->nfsc_deleghash[i]);
915 for (i = 0; i < NFSCLOPENHASHSIZE; i++)
916 LIST_INIT(&clp->nfsc_openhash[i]);
917 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
918 LIST_INIT(&clp->nfsc_layouthash[i]);
919 clp->nfsc_flags = NFSCLFLAGS_INITED;
920 clp->nfsc_clientidrev = 1;
921 clp->nfsc_cbident = nfscl_nextcbident();
922 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
923 clp->nfsc_idlen);
924 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
925 nmp->nm_clp = clp;
926 clp->nfsc_nmp = nmp;
927 } else {
928 if (newclp != NULL)
929 free(newclp, M_NFSCLCLIENT);
930 }
931 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
932 !NFSCL_FORCEDISM(mp))
933 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
934 NFSCLSTATEMUTEXPTR, mp);
935 if (igotlock == 0) {
936 /*
937 * Call nfsv4_lock() with "iwantlock == 0" on the firstref so
938 * that it will wait for a pending exclusive lock request.
939 * This gives the exclusive lock request priority over this
940 * shared lock request.
941 * An exclusive lock on nfsc_lock is used mainly for server
942 * crash recoveries and delegation recalls.
943 */
944 if (firstref)
945 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR,
946 mp);
947 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
948 }
949 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) {
950 /*
951 * Both nfsv4_lock() and nfsv4_getref() know to check
952 * for NFSCL_FORCEDISM() and return without sleeping to
953 * wait for the exclusive lock to be released, since it
954 * might be held by nfscl_umount() and we need to get out
955 * now for that case and not wait until nfscl_umount()
956 * releases it.
957 */
958 NFSUNLOCKCLSTATE();
959 return (EBADF);
960 }
961 NFSUNLOCKCLSTATE();
962
963 /*
964 * If it needs a clientid, do the setclientid now.
965 */
966 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
967 if (!igotlock)
968 panic("nfscl_clget");
969 if (p == NULL || cred == NULL) {
970 NFSLOCKCLSTATE();
971 nfsv4_unlock(&clp->nfsc_lock, 0);
972 NFSUNLOCKCLSTATE();
973 return (EACCES);
974 }
975 /*
976 * If RFC3530 Sec. 14.2.33 is taken literally,
977 * NFSERR_CLIDINUSE will be returned persistently for the
978 * case where a new mount of the same file system is using
979 * a different principal. In practice, NFSERR_CLIDINUSE is
980 * only returned when there is outstanding unexpired state
981 * on the clientid. As such, try for twice the lease
982 * interval, if we know what that is. Otherwise, make a
983 * wild ass guess.
984 * The case of returning NFSERR_STALECLIENTID is far less
985 * likely, but might occur if there is a significant delay
986 * between doing the SetClientID and SetClientIDConfirm Ops,
987 * such that the server throws away the clientid before
988 * receiving the SetClientIDConfirm.
989 */
990 if (clp->nfsc_renew > 0)
991 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
992 else
993 clidinusedelay = 120;
994 trystalecnt = 3;
995 do {
996 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
997 if (error == NFSERR_STALECLIENTID ||
998 error == NFSERR_STALEDONTRECOVER ||
999 error == NFSERR_BADSESSION ||
1000 error == NFSERR_CLIDINUSE) {
1001 (void) nfs_catnap(PZERO, error, "nfs_setcl");
1002 } else if (error == NFSERR_MINORVERMISMATCH &&
1003 tryminvers) {
1004 if (nmp->nm_minorvers > 0)
1005 nmp->nm_minorvers--;
1006 else
1007 tryminvers = false;
1008 }
1009 } while (((error == NFSERR_STALECLIENTID ||
1010 error == NFSERR_BADSESSION ||
1011 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
1012 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0) ||
1013 (error == NFSERR_MINORVERMISMATCH && tryminvers));
1014 if (error) {
1015 NFSLOCKCLSTATE();
1016 nfsv4_unlock(&clp->nfsc_lock, 0);
1017 NFSUNLOCKCLSTATE();
1018 return (error);
1019 }
1020 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
1021 }
1022 if (igotlock) {
1023 NFSLOCKCLSTATE();
1024 nfsv4_unlock(&clp->nfsc_lock, 1);
1025 NFSUNLOCKCLSTATE();
1026 }
1027
1028 *clpp = clp;
1029 return (0);
1030 }
1031
1032 /*
1033 * Get a reference to a clientid and return it, if valid.
1034 */
1035 struct nfsclclient *
1036 nfscl_findcl(struct nfsmount *nmp)
1037 {
1038 struct nfsclclient *clp;
1039
1040 clp = nmp->nm_clp;
1041 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
1042 return (NULL);
1043 return (clp);
1044 }
1045
1046 /*
1047 * Release the clientid structure. It may be locked or reference counted.
1048 */
1049 static void
1050 nfscl_clrelease(struct nfsclclient *clp)
1051 {
1052
1053 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
1054 nfsv4_unlock(&clp->nfsc_lock, 0);
1055 else
1056 nfsv4_relref(&clp->nfsc_lock);
1057 }
1058
1059 /*
1060 * External call for nfscl_clrelease.
1061 */
1062 void
1063 nfscl_clientrelease(struct nfsclclient *clp)
1064 {
1065
1066 NFSLOCKCLSTATE();
1067 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
1068 nfsv4_unlock(&clp->nfsc_lock, 0);
1069 else
1070 nfsv4_relref(&clp->nfsc_lock);
1071 NFSUNLOCKCLSTATE();
1072 }
1073
1074 /*
1075 * Called when wanting to lock a byte region.
1076 */
1077 int
1078 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1079 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
1080 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
1081 struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
1082 {
1083 struct nfscllockowner *lp;
1084 struct nfsclopen *op;
1085 struct nfsclclient *clp;
1086 struct nfscllockowner *nlp;
1087 struct nfscllock *nlop, *otherlop;
1088 struct nfscldeleg *dp = NULL, *ldp = NULL;
1089 struct nfscllockownerhead *lhp = NULL;
1090 struct nfsnode *np;
1091 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
1092 u_int8_t *openownp;
1093 int error = 0, ret, donelocally = 0;
1094 u_int32_t mode;
1095
1096 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
1097 mode = 0;
1098 np = VTONFS(vp);
1099 *lpp = NULL;
1100 lp = NULL;
1101 *newonep = 0;
1102 *donelocallyp = 0;
1103
1104 /*
1105 * Might need these, so MALLOC them now, to
1106 * avoid a tsleep() in MALLOC later.
1107 */
1108 nlp = malloc(
1109 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
1110 otherlop = malloc(
1111 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1112 nlop = malloc(
1113 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1114 nlop->nfslo_type = type;
1115 nlop->nfslo_first = off;
1116 if (len == NFS64BITSSET) {
1117 nlop->nfslo_end = NFS64BITSSET;
1118 } else {
1119 nlop->nfslo_end = off + len;
1120 if (nlop->nfslo_end <= nlop->nfslo_first)
1121 error = NFSERR_INVAL;
1122 }
1123
1124 if (!error) {
1125 if (recovery)
1126 clp = rclp;
1127 else
1128 error = nfscl_getcl(vp->v_mount, cred, p, false, true,
1129 &clp);
1130 }
1131 if (error) {
1132 free(nlp, M_NFSCLLOCKOWNER);
1133 free(otherlop, M_NFSCLLOCK);
1134 free(nlop, M_NFSCLLOCK);
1135 return (error);
1136 }
1137
1138 op = NULL;
1139 if (recovery) {
1140 ownp = rownp;
1141 openownp = ropenownp;
1142 } else {
1143 nfscl_filllockowner(id, own, flags);
1144 ownp = own;
1145 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
1146 nfscl_filllockowner(NULL, openown, F_POSIX);
1147 else
1148 nfscl_filllockowner(p->td_proc, openown, F_POSIX);
1149 openownp = openown;
1150 }
1151 if (!recovery) {
1152 NFSLOCKCLSTATE();
1153 /*
1154 * First, search for a delegation. If one exists for this file,
1155 * the lock can be done locally against it, so long as there
1156 * isn't a local lock conflict.
1157 */
1158 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1159 np->n_fhp->nfh_len);
1160 /* Just sanity check for correct type of delegation */
1161 if (dp != NULL && ((dp->nfsdl_flags &
1162 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
1163 (type == F_WRLCK &&
1164 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
1165 dp = NULL;
1166 }
1167 if (dp != NULL) {
1168 /* Now, find an open and maybe a lockowner. */
1169 ret = nfscl_getopen(&dp->nfsdl_owner, NULL, np->n_fhp->nfh_fh,
1170 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
1171 if (ret)
1172 ret = nfscl_getopen(NULL, clp->nfsc_openhash,
1173 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1174 ownp, mode, NULL, &op);
1175 if (!ret) {
1176 lhp = &dp->nfsdl_lock;
1177 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
1178 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
1179 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
1180 donelocally = 1;
1181 } else {
1182 dp = NULL;
1183 }
1184 }
1185 if (!donelocally) {
1186 /*
1187 * Get the related Open and maybe lockowner.
1188 */
1189 error = nfscl_getopen(NULL, clp->nfsc_openhash,
1190 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1191 ownp, mode, &lp, &op);
1192 if (!error)
1193 lhp = &op->nfso_lock;
1194 }
1195 if (!error && !recovery)
1196 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1197 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1198 if (error) {
1199 if (!recovery) {
1200 nfscl_clrelease(clp);
1201 NFSUNLOCKCLSTATE();
1202 }
1203 free(nlp, M_NFSCLLOCKOWNER);
1204 free(otherlop, M_NFSCLLOCK);
1205 free(nlop, M_NFSCLLOCK);
1206 return (error);
1207 }
1208
1209 /*
1210 * Ok, see if a lockowner exists and create one, as required.
1211 */
1212 if (lp == NULL)
1213 LIST_FOREACH(lp, lhp, nfsl_list) {
1214 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1215 break;
1216 }
1217 if (lp == NULL) {
1218 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1219 if (recovery)
1220 NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1221 NFSV4CL_LOCKNAMELEN);
1222 else
1223 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1224 NFSV4CL_LOCKNAMELEN);
1225 nlp->nfsl_seqid = 0;
1226 nlp->nfsl_lockflags = flags;
1227 nlp->nfsl_inprog = NULL;
1228 nfscl_lockinit(&nlp->nfsl_rwlock);
1229 LIST_INIT(&nlp->nfsl_lock);
1230 if (donelocally) {
1231 nlp->nfsl_open = NULL;
1232 nfsstatsv1.cllocallockowners++;
1233 } else {
1234 nlp->nfsl_open = op;
1235 nfsstatsv1.cllockowners++;
1236 }
1237 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1238 lp = nlp;
1239 nlp = NULL;
1240 *newonep = 1;
1241 }
1242
1243 /*
1244 * Now, update the byte ranges for locks.
1245 */
1246 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1247 if (!ret)
1248 donelocally = 1;
1249 if (donelocally) {
1250 *donelocallyp = 1;
1251 if (!recovery)
1252 nfscl_clrelease(clp);
1253 } else {
1254 /*
1255 * Serial modifications on the lock owner for multiple threads
1256 * for the same process using a read/write lock.
1257 */
1258 if (!recovery)
1259 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1260 }
1261 if (!recovery)
1262 NFSUNLOCKCLSTATE();
1263
1264 if (nlp)
1265 free(nlp, M_NFSCLLOCKOWNER);
1266 if (nlop)
1267 free(nlop, M_NFSCLLOCK);
1268 if (otherlop)
1269 free(otherlop, M_NFSCLLOCK);
1270
1271 *lpp = lp;
1272 return (0);
1273 }
1274
1275 /*
1276 * Called to unlock a byte range, for LockU.
1277 */
1278 int
1279 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1280 __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1281 struct nfsclclient *clp, void *id, int flags,
1282 struct nfscllockowner **lpp, int *dorpcp)
1283 {
1284 struct nfscllockowner *lp;
1285 struct nfsclopen *op;
1286 struct nfscllock *nlop, *other_lop = NULL;
1287 struct nfscldeleg *dp;
1288 struct nfsnode *np;
1289 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1290 int ret = 0, fnd;
1291
1292 np = VTONFS(vp);
1293 *lpp = NULL;
1294 *dorpcp = 0;
1295
1296 /*
1297 * Might need these, so MALLOC them now, to
1298 * avoid a tsleep() in MALLOC later.
1299 */
1300 nlop = malloc(
1301 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1302 nlop->nfslo_type = F_UNLCK;
1303 nlop->nfslo_first = off;
1304 if (len == NFS64BITSSET) {
1305 nlop->nfslo_end = NFS64BITSSET;
1306 } else {
1307 nlop->nfslo_end = off + len;
1308 if (nlop->nfslo_end <= nlop->nfslo_first) {
1309 free(nlop, M_NFSCLLOCK);
1310 return (NFSERR_INVAL);
1311 }
1312 }
1313 if (callcnt == 0) {
1314 other_lop = malloc(
1315 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1316 *other_lop = *nlop;
1317 }
1318 nfscl_filllockowner(id, own, flags);
1319 dp = NULL;
1320 NFSLOCKCLSTATE();
1321 if (callcnt == 0)
1322 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1323 np->n_fhp->nfh_len);
1324
1325 /*
1326 * First, unlock any local regions on a delegation.
1327 */
1328 if (dp != NULL) {
1329 /* Look for this lockowner. */
1330 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1331 if (!NFSBCMP(lp->nfsl_owner, own,
1332 NFSV4CL_LOCKNAMELEN))
1333 break;
1334 }
1335 if (lp != NULL)
1336 /* Use other_lop, so nlop is still available */
1337 (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1338 }
1339
1340 /*
1341 * Now, find a matching open/lockowner that hasn't already been done,
1342 * as marked by nfsl_inprog.
1343 */
1344 lp = NULL;
1345 fnd = 0;
1346 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1347 np->n_fhp->nfh_len), nfso_hash) {
1348 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1349 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1350 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1351 if (lp->nfsl_inprog == NULL &&
1352 !NFSBCMP(lp->nfsl_owner, own,
1353 NFSV4CL_LOCKNAMELEN)) {
1354 fnd = 1;
1355 break;
1356 }
1357 }
1358 }
1359 if (fnd)
1360 break;
1361 }
1362
1363 if (lp != NULL) {
1364 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1365 if (ret)
1366 *dorpcp = 1;
1367 /*
1368 * Serial modifications on the lock owner for multiple
1369 * threads for the same process using a read/write lock.
1370 */
1371 lp->nfsl_inprog = p;
1372 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1373 *lpp = lp;
1374 }
1375 NFSUNLOCKCLSTATE();
1376 if (nlop)
1377 free(nlop, M_NFSCLLOCK);
1378 if (other_lop)
1379 free(other_lop, M_NFSCLLOCK);
1380 return (0);
1381 }
1382
1383 /*
1384 * Release all lockowners marked in progess for this process and file.
1385 */
1386 void
1387 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1388 void *id, int flags)
1389 {
1390 struct nfsclopen *op;
1391 struct nfscllockowner *lp;
1392 struct nfsnode *np;
1393 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1394
1395 np = VTONFS(vp);
1396 nfscl_filllockowner(id, own, flags);
1397 NFSLOCKCLSTATE();
1398 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1399 np->n_fhp->nfh_len), nfso_hash) {
1400 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1401 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1402 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1403 if (lp->nfsl_inprog == p &&
1404 !NFSBCMP(lp->nfsl_owner, own,
1405 NFSV4CL_LOCKNAMELEN)) {
1406 lp->nfsl_inprog = NULL;
1407 nfscl_lockunlock(&lp->nfsl_rwlock);
1408 }
1409 }
1410 }
1411 }
1412 nfscl_clrelease(clp);
1413 NFSUNLOCKCLSTATE();
1414 }
1415
1416 /*
1417 * Called to find out if any bytes within the byte range specified are
1418 * write locked by the calling process. Used to determine if flushing
1419 * is required before a LockU.
1420 * If in doubt, return 1, so the flush will occur.
1421 */
1422 int
1423 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1424 struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1425 {
1426 struct nfscllockowner *lp;
1427 struct nfsclopen *op;
1428 struct nfsclclient *clp;
1429 struct nfscllock *lop;
1430 struct nfscldeleg *dp;
1431 struct nfsnode *np;
1432 u_int64_t off, end;
1433 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1434 int error = 0;
1435
1436 np = VTONFS(vp);
1437 switch (fl->l_whence) {
1438 case SEEK_SET:
1439 case SEEK_CUR:
1440 /*
1441 * Caller is responsible for adding any necessary offset
1442 * when SEEK_CUR is used.
1443 */
1444 off = fl->l_start;
1445 break;
1446 case SEEK_END:
1447 off = np->n_size + fl->l_start;
1448 break;
1449 default:
1450 return (1);
1451 }
1452 if (fl->l_len != 0) {
1453 end = off + fl->l_len;
1454 if (end < off)
1455 return (1);
1456 } else {
1457 end = NFS64BITSSET;
1458 }
1459
1460 error = nfscl_getcl(vp->v_mount, cred, p, false, true, &clp);
1461 if (error)
1462 return (1);
1463 nfscl_filllockowner(id, own, flags);
1464 NFSLOCKCLSTATE();
1465
1466 /*
1467 * First check the delegation locks.
1468 */
1469 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1470 if (dp != NULL) {
1471 /* No need to flush if it is a write delegation. */
1472 if ((dp->nfsdl_flags & NFSCLDL_WRITE) != 0) {
1473 nfscl_clrelease(clp);
1474 NFSUNLOCKCLSTATE();
1475 return (0);
1476 }
1477 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1478 if (!NFSBCMP(lp->nfsl_owner, own,
1479 NFSV4CL_LOCKNAMELEN))
1480 break;
1481 }
1482 if (lp != NULL) {
1483 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1484 if (lop->nfslo_first >= end)
1485 break;
1486 if (lop->nfslo_end <= off)
1487 continue;
1488 if (lop->nfslo_type == F_WRLCK) {
1489 nfscl_clrelease(clp);
1490 NFSUNLOCKCLSTATE();
1491 return (1);
1492 }
1493 }
1494 }
1495 }
1496
1497 /*
1498 * Now, check state against the server.
1499 */
1500 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1501 np->n_fhp->nfh_len), nfso_hash) {
1502 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1503 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1504 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1505 if (!NFSBCMP(lp->nfsl_owner, own,
1506 NFSV4CL_LOCKNAMELEN))
1507 break;
1508 }
1509 if (lp != NULL) {
1510 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1511 if (lop->nfslo_first >= end)
1512 break;
1513 if (lop->nfslo_end <= off)
1514 continue;
1515 if (lop->nfslo_type == F_WRLCK) {
1516 nfscl_clrelease(clp);
1517 NFSUNLOCKCLSTATE();
1518 return (1);
1519 }
1520 }
1521 }
1522 }
1523 }
1524 nfscl_clrelease(clp);
1525 NFSUNLOCKCLSTATE();
1526 return (0);
1527 }
1528
1529 /*
1530 * Release a byte range lock owner structure.
1531 */
1532 void
1533 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1534 {
1535 struct nfsclclient *clp;
1536
1537 if (lp == NULL)
1538 return;
1539 NFSLOCKCLSTATE();
1540 clp = lp->nfsl_open->nfso_own->nfsow_clp;
1541 if (error != 0 && candelete &&
1542 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1543 nfscl_freelockowner(lp, 0);
1544 else
1545 nfscl_lockunlock(&lp->nfsl_rwlock);
1546 nfscl_clrelease(clp);
1547 NFSUNLOCKCLSTATE();
1548 }
1549
1550 /*
1551 * Unlink the open structure.
1552 */
1553 static void
1554 nfscl_unlinkopen(struct nfsclopen *op)
1555 {
1556
1557 LIST_REMOVE(op, nfso_list);
1558 if (op->nfso_hash.le_prev != NULL)
1559 LIST_REMOVE(op, nfso_hash);
1560 }
1561
1562 /*
1563 * Free up an open structure and any associated byte range lock structures.
1564 */
1565 void
1566 nfscl_freeopen(struct nfsclopen *op, int local, bool unlink)
1567 {
1568
1569 if (unlink)
1570 nfscl_unlinkopen(op);
1571 nfscl_freealllocks(&op->nfso_lock, local);
1572 free(op, M_NFSCLOPEN);
1573 if (local)
1574 nfsstatsv1.cllocalopens--;
1575 else
1576 nfsstatsv1.clopens--;
1577 }
1578
1579 /*
1580 * Free up all lock owners and associated locks.
1581 */
1582 static void
1583 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1584 {
1585 struct nfscllockowner *lp, *nlp;
1586
1587 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1588 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1589 panic("nfscllckw");
1590 nfscl_freelockowner(lp, local);
1591 }
1592 }
1593
1594 /*
1595 * Called for an Open when NFSERR_EXPIRED is received from the server.
1596 * If there are no byte range locks nor a Share Deny lost, try to do a
1597 * fresh Open. Otherwise, free the open.
1598 */
1599 static int
1600 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1601 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1602 {
1603 struct nfscllockowner *lp;
1604 struct nfscldeleg *dp;
1605 int mustdelete = 0, error;
1606
1607 /*
1608 * Look for any byte range lock(s).
1609 */
1610 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1611 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1612 mustdelete = 1;
1613 break;
1614 }
1615 }
1616
1617 /*
1618 * If no byte range lock(s) nor a Share deny, try to re-open.
1619 */
1620 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1621 newnfs_copycred(&op->nfso_cred, cred);
1622 dp = NULL;
1623 error = nfsrpc_reopen(nmp, op->nfso_fh,
1624 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1625 if (error) {
1626 mustdelete = 1;
1627 if (dp != NULL) {
1628 free(dp, M_NFSCLDELEG);
1629 dp = NULL;
1630 }
1631 }
1632 if (dp != NULL)
1633 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1634 op->nfso_fhlen, cred, p, &dp);
1635 }
1636
1637 /*
1638 * If a byte range lock or Share deny or couldn't re-open, free it.
1639 */
1640 if (mustdelete)
1641 nfscl_freeopen(op, 0, true);
1642 return (mustdelete);
1643 }
1644
1645 /*
1646 * Free up an open owner structure.
1647 */
1648 static void
1649 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1650 {
1651 int owned;
1652
1653 /*
1654 * Make sure the NFSCLSTATE mutex is held, to avoid races with
1655 * calls in nfscl_renewthread() that do not hold a reference
1656 * count on the nfsclclient and just the mutex.
1657 * The mutex will not be held for calls done with the exclusive
1658 * nfsclclient lock held, in particular, nfscl_hasexpired()
1659 * and nfscl_recalldeleg() might do this.
1660 */
1661 owned = mtx_owned(NFSCLSTATEMUTEXPTR);
1662 if (owned == 0)
1663 NFSLOCKCLSTATE();
1664 LIST_REMOVE(owp, nfsow_list);
1665 if (owned == 0)
1666 NFSUNLOCKCLSTATE();
1667 free(owp, M_NFSCLOWNER);
1668 if (local)
1669 nfsstatsv1.cllocalopenowners--;
1670 else
1671 nfsstatsv1.clopenowners--;
1672 }
1673
1674 /*
1675 * Free up a byte range lock owner structure.
1676 */
1677 void
1678 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1679 {
1680 struct nfscllock *lop, *nlop;
1681 int owned;
1682
1683 /*
1684 * Make sure the NFSCLSTATE mutex is held, to avoid races with
1685 * calls in nfscl_renewthread() that do not hold a reference
1686 * count on the nfsclclient and just the mutex.
1687 * The mutex will not be held for calls done with the exclusive
1688 * nfsclclient lock held, in particular, nfscl_hasexpired()
1689 * and nfscl_recalldeleg() might do this.
1690 */
1691 owned = mtx_owned(NFSCLSTATEMUTEXPTR);
1692 if (owned == 0)
1693 NFSLOCKCLSTATE();
1694 LIST_REMOVE(lp, nfsl_list);
1695 if (owned == 0)
1696 NFSUNLOCKCLSTATE();
1697 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1698 nfscl_freelock(lop, local);
1699 }
1700 free(lp, M_NFSCLLOCKOWNER);
1701 if (local)
1702 nfsstatsv1.cllocallockowners--;
1703 else
1704 nfsstatsv1.cllockowners--;
1705 }
1706
1707 /*
1708 * Free up a byte range lock structure.
1709 */
1710 void
1711 nfscl_freelock(struct nfscllock *lop, int local)
1712 {
1713
1714 LIST_REMOVE(lop, nfslo_list);
1715 free(lop, M_NFSCLLOCK);
1716 if (local)
1717 nfsstatsv1.cllocallocks--;
1718 else
1719 nfsstatsv1.cllocks--;
1720 }
1721
1722 /*
1723 * Clean out the state related to a delegation.
1724 */
1725 static void
1726 nfscl_cleandeleg(struct nfscldeleg *dp)
1727 {
1728 struct nfsclowner *owp, *nowp;
1729 struct nfsclopen *op;
1730
1731 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1732 op = LIST_FIRST(&owp->nfsow_open);
1733 if (op != NULL) {
1734 if (LIST_NEXT(op, nfso_list) != NULL)
1735 panic("nfscleandel");
1736 nfscl_freeopen(op, 1, true);
1737 }
1738 nfscl_freeopenowner(owp, 1);
1739 }
1740 nfscl_freealllocks(&dp->nfsdl_lock, 1);
1741 }
1742
1743 /*
1744 * Free a delegation.
1745 */
1746 static void
1747 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp, bool freeit)
1748 {
1749
1750 TAILQ_REMOVE(hdp, dp, nfsdl_list);
1751 LIST_REMOVE(dp, nfsdl_hash);
1752 if (freeit)
1753 free(dp, M_NFSCLDELEG);
1754 nfsstatsv1.cldelegates--;
1755 nfscl_delegcnt--;
1756 }
1757
1758 /*
1759 * Free up all state related to this client structure.
1760 */
1761 static void
1762 nfscl_cleanclient(struct nfsclclient *clp)
1763 {
1764 struct nfsclowner *owp, *nowp;
1765 struct nfsclopen *op, *nop;
1766 struct nfscllayout *lyp, *nlyp;
1767 struct nfscldevinfo *dip, *ndip;
1768
1769 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
1770 nfscl_freelayout(lyp);
1771
1772 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip)
1773 nfscl_freedevinfo(dip);
1774
1775 /* Now, all the OpenOwners, etc. */
1776 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1777 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1778 nfscl_freeopen(op, 0, true);
1779 }
1780 nfscl_freeopenowner(owp, 0);
1781 }
1782 }
1783
1784 /*
1785 * Called when an NFSERR_EXPIRED is received from the server.
1786 */
1787 static void
1788 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1789 struct ucred *cred, NFSPROC_T *p)
1790 {
1791 struct nfsclowner *owp, *nowp, *towp;
1792 struct nfsclopen *op, *nop, *top;
1793 struct nfscldeleg *dp, *ndp;
1794 int ret, printed = 0;
1795
1796 /*
1797 * First, merge locally issued Opens into the list for the server.
1798 */
1799 dp = TAILQ_FIRST(&clp->nfsc_deleg);
1800 while (dp != NULL) {
1801 ndp = TAILQ_NEXT(dp, nfsdl_list);
1802 owp = LIST_FIRST(&dp->nfsdl_owner);
1803 while (owp != NULL) {
1804 nowp = LIST_NEXT(owp, nfsow_list);
1805 op = LIST_FIRST(&owp->nfsow_open);
1806 if (op != NULL) {
1807 if (LIST_NEXT(op, nfso_list) != NULL)
1808 panic("nfsclexp");
1809 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1810 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1811 NFSV4CL_LOCKNAMELEN))
1812 break;
1813 }
1814 if (towp != NULL) {
1815 /* Merge opens in */
1816 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1817 if (top->nfso_fhlen == op->nfso_fhlen &&
1818 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1819 op->nfso_fhlen)) {
1820 top->nfso_mode |= op->nfso_mode;
1821 top->nfso_opencnt += op->nfso_opencnt;
1822 break;
1823 }
1824 }
1825 if (top == NULL) {
1826 /* Just add the open to the owner list */
1827 LIST_REMOVE(op, nfso_list);
1828 op->nfso_own = towp;
1829 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1830 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
1831 op->nfso_fhlen), op, nfso_hash);
1832 nfsstatsv1.cllocalopens--;
1833 nfsstatsv1.clopens++;
1834 }
1835 } else {
1836 /* Just add the openowner to the client list */
1837 LIST_REMOVE(owp, nfsow_list);
1838 owp->nfsow_clp = clp;
1839 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1840 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
1841 op->nfso_fhlen), op, nfso_hash);
1842 nfsstatsv1.cllocalopenowners--;
1843 nfsstatsv1.clopenowners++;
1844 nfsstatsv1.cllocalopens--;
1845 nfsstatsv1.clopens++;
1846 }
1847 }
1848 owp = nowp;
1849 }
1850 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1851 printed = 1;
1852 printf("nfsv4 expired locks lost\n");
1853 }
1854 nfscl_cleandeleg(dp);
1855 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
1856 dp = ndp;
1857 }
1858 if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1859 panic("nfsclexp");
1860
1861 /*
1862 * Now, try and reopen against the server.
1863 */
1864 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1865 owp->nfsow_seqid = 0;
1866 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1867 ret = nfscl_expireopen(clp, op, nmp, cred, p);
1868 if (ret && !printed) {
1869 printed = 1;
1870 printf("nfsv4 expired locks lost\n");
1871 }
1872 }
1873 if (LIST_EMPTY(&owp->nfsow_open))
1874 nfscl_freeopenowner(owp, 0);
1875 }
1876 }
1877
1878 /*
1879 * This function must be called after the process represented by "own" has
1880 * exited. Must be called with CLSTATE lock held.
1881 */
1882 static void
1883 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1884 {
1885 struct nfsclowner *owp, *nowp;
1886 struct nfscllockowner *lp;
1887 struct nfscldeleg *dp;
1888
1889 /* First, get rid of local locks on delegations. */
1890 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1891 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1892 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1893 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1894 panic("nfscllckw");
1895 nfscl_freelockowner(lp, 1);
1896 break;
1897 }
1898 }
1899 }
1900 owp = LIST_FIRST(&clp->nfsc_owner);
1901 while (owp != NULL) {
1902 nowp = LIST_NEXT(owp, nfsow_list);
1903 if (!NFSBCMP(owp->nfsow_owner, own,
1904 NFSV4CL_LOCKNAMELEN)) {
1905 /*
1906 * If there are children that haven't closed the
1907 * file descriptors yet, the opens will still be
1908 * here. For that case, let the renew thread clear
1909 * out the OpenOwner later.
1910 */
1911 if (LIST_EMPTY(&owp->nfsow_open))
1912 nfscl_freeopenowner(owp, 0);
1913 else
1914 owp->nfsow_defunct = 1;
1915 break;
1916 }
1917 owp = nowp;
1918 }
1919 }
1920
1921 /*
1922 * Find open/lock owners for processes that have exited.
1923 */
1924 static void
1925 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1926 {
1927 struct nfsclowner *owp, *nowp;
1928 struct nfsclopen *op;
1929 struct nfscllockowner *lp, *nlp;
1930 struct nfscldeleg *dp;
1931 uint8_t own[NFSV4CL_LOCKNAMELEN];
1932
1933 /*
1934 * All the pidhash locks must be acquired, since they are sx locks
1935 * and must be acquired before the mutexes. The pid(s) that will
1936 * be used aren't known yet, so all the locks need to be acquired.
1937 * Fortunately, this function is only performed once/sec.
1938 */
1939 pidhash_slockall();
1940 NFSLOCKCLSTATE();
1941 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1942 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1943 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1944 if (LIST_EMPTY(&lp->nfsl_lock))
1945 nfscl_emptylockowner(lp, lhp);
1946 }
1947 }
1948 if (nfscl_procdoesntexist(owp->nfsow_owner)) {
1949 memcpy(own, owp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
1950 nfscl_cleanup_common(clp, own);
1951 }
1952 }
1953
1954 /*
1955 * For the single open_owner case, these lock owners need to be
1956 * checked to see if they still exist separately.
1957 * This is because nfscl_procdoesntexist() never returns true for
1958 * the single open_owner so that the above doesn't ever call
1959 * nfscl_cleanup_common().
1960 */
1961 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1962 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1963 if (nfscl_procdoesntexist(lp->nfsl_owner)) {
1964 memcpy(own, lp->nfsl_owner,
1965 NFSV4CL_LOCKNAMELEN);
1966 nfscl_cleanup_common(clp, own);
1967 }
1968 }
1969 }
1970 NFSUNLOCKCLSTATE();
1971 pidhash_sunlockall();
1972 }
1973
1974 /*
1975 * Take the empty lock owner and move it to the local lhp list if the
1976 * associated process no longer exists.
1977 */
1978 static void
1979 nfscl_emptylockowner(struct nfscllockowner *lp,
1980 struct nfscllockownerfhhead *lhp)
1981 {
1982 struct nfscllockownerfh *lfhp, *mylfhp;
1983 struct nfscllockowner *nlp;
1984 int fnd_it;
1985
1986 /* If not a Posix lock owner, just return. */
1987 if ((lp->nfsl_lockflags & F_POSIX) == 0)
1988 return;
1989
1990 fnd_it = 0;
1991 mylfhp = NULL;
1992 /*
1993 * First, search to see if this lock owner is already in the list.
1994 * If it is, then the associated process no longer exists.
1995 */
1996 SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
1997 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
1998 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
1999 lfhp->nfslfh_len))
2000 mylfhp = lfhp;
2001 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
2002 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
2003 NFSV4CL_LOCKNAMELEN))
2004 fnd_it = 1;
2005 }
2006 /* If not found, check if process still exists. */
2007 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
2008 return;
2009
2010 /* Move the lock owner over to the local list. */
2011 if (mylfhp == NULL) {
2012 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
2013 M_NOWAIT);
2014 if (mylfhp == NULL)
2015 return;
2016 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
2017 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
2018 mylfhp->nfslfh_len);
2019 LIST_INIT(&mylfhp->nfslfh_lock);
2020 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
2021 }
2022 LIST_REMOVE(lp, nfsl_list);
2023 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
2024 }
2025
2026 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */
2027 /*
2028 * Called from nfs umount to free up the clientid.
2029 */
2030 void
2031 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p, struct nfscldeleghead *dhp)
2032 {
2033 struct nfsclclient *clp;
2034 struct ucred *cred;
2035 int igotlock;
2036
2037 /*
2038 * For the case that matters, this is the thread that set
2039 * MNTK_UNMOUNTF, so it will see it set. The code that follows is
2040 * done to ensure that any thread executing nfscl_getcl() after
2041 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
2042 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
2043 * explanation, courtesy of Alan Cox.
2044 * What follows is a snippet from Alan Cox's email at:
2045 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
2046 *
2047 * 1. Set MNTK_UNMOUNTF
2048 * 2. Acquire a standard FreeBSD mutex "m".
2049 * 3. Update some data structures.
2050 * 4. Release mutex "m".
2051 *
2052 * Then, other threads that acquire "m" after step 4 has occurred will
2053 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to
2054 * step 2 may or may not see MNTK_UNMOUNTF as set.
2055 */
2056 NFSLOCKCLSTATE();
2057 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
2058 fake_global++;
2059 NFSUNLOCKCLSTATE();
2060 NFSLOCKCLSTATE();
2061 }
2062
2063 clp = nmp->nm_clp;
2064 if (clp != NULL) {
2065 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
2066 panic("nfscl umount");
2067
2068 /*
2069 * First, handshake with the nfscl renew thread, to terminate
2070 * it.
2071 */
2072 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
2073 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
2074 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
2075 "nfsclumnt", hz);
2076
2077 /*
2078 * Now, get the exclusive lock on the client state, so
2079 * that no uses of the state are still in progress.
2080 */
2081 do {
2082 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2083 NFSCLSTATEMUTEXPTR, NULL);
2084 } while (!igotlock);
2085 NFSUNLOCKCLSTATE();
2086
2087 /*
2088 * Free up all the state. It will expire on the server, but
2089 * maybe we should do a SetClientId/SetClientIdConfirm so
2090 * the server throws it away?
2091 */
2092 LIST_REMOVE(clp, nfsc_list);
2093 nfscl_delegreturnall(clp, p, dhp);
2094 cred = newnfs_getcred();
2095 if (NFSHASNFSV4N(nmp)) {
2096 nfsrpc_destroysession(nmp, NULL, cred, p);
2097 nfsrpc_destroyclient(nmp, clp, cred, p);
2098 } else
2099 nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
2100 nfscl_cleanclient(clp);
2101 nmp->nm_clp = NULL;
2102 NFSFREECRED(cred);
2103 free(clp, M_NFSCLCLIENT);
2104 } else
2105 NFSUNLOCKCLSTATE();
2106 }
2107
2108 /*
2109 * This function is called when a server replies with NFSERR_STALECLIENTID
2110 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
2111 * doing Opens and Locks with reclaim. If these fail, it deletes the
2112 * corresponding state.
2113 */
2114 static void
2115 nfscl_recover(struct nfsclclient *clp, bool *retokp, struct ucred *cred,
2116 NFSPROC_T *p)
2117 {
2118 struct nfsclowner *owp, *nowp;
2119 struct nfsclopen *op, *nop;
2120 struct nfscllockowner *lp, *nlp;
2121 struct nfscllock *lop, *nlop;
2122 struct nfscldeleg *dp, *ndp, *tdp;
2123 struct nfsmount *nmp;
2124 struct ucred *tcred;
2125 struct nfsclopenhead extra_open;
2126 struct nfscldeleghead extra_deleg;
2127 struct nfsreq *rep;
2128 u_int64_t len;
2129 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
2130 int i, igotlock = 0, error, trycnt, firstlock;
2131 struct nfscllayout *lyp, *nlyp;
2132 bool recovered_one;
2133
2134 /*
2135 * First, lock the client structure, so everyone else will
2136 * block when trying to use state.
2137 */
2138 NFSLOCKCLSTATE();
2139 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2140 do {
2141 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2142 NFSCLSTATEMUTEXPTR, NULL);
2143 } while (!igotlock);
2144 NFSUNLOCKCLSTATE();
2145
2146 nmp = clp->nfsc_nmp;
2147 if (nmp == NULL)
2148 panic("nfscl recover");
2149
2150 /*
2151 * For now, just get rid of all layouts. There may be a need
2152 * to do LayoutCommit Ops with reclaim == true later.
2153 */
2154 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
2155 nfscl_freelayout(lyp);
2156 TAILQ_INIT(&clp->nfsc_layout);
2157 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
2158 LIST_INIT(&clp->nfsc_layouthash[i]);
2159
2160 trycnt = 5;
2161 tcred = NULL;
2162 do {
2163 error = nfsrpc_setclient(nmp, clp, 1, retokp, cred, p);
2164 } while ((error == NFSERR_STALECLIENTID ||
2165 error == NFSERR_BADSESSION ||
2166 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2167 if (error) {
2168 NFSLOCKCLSTATE();
2169 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
2170 NFSCLFLAGS_RECVRINPROG);
2171 wakeup(&clp->nfsc_flags);
2172 nfsv4_unlock(&clp->nfsc_lock, 0);
2173 NFSUNLOCKCLSTATE();
2174 return;
2175 }
2176 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2177 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2178
2179 /*
2180 * Mark requests already queued on the server, so that they don't
2181 * initiate another recovery cycle. Any requests already in the
2182 * queue that handle state information will have the old stale
2183 * clientid/stateid and will get a NFSERR_STALESTATEID,
2184 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
2185 * This will be translated to NFSERR_STALEDONTRECOVER when
2186 * R_DONTRECOVER is set.
2187 */
2188 NFSLOCKREQ();
2189 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
2190 if (rep->r_nmp == nmp)
2191 rep->r_flags |= R_DONTRECOVER;
2192 }
2193 NFSUNLOCKREQ();
2194
2195 /*
2196 * If nfsrpc_setclient() returns *retokp == true,
2197 * no more recovery is needed.
2198 */
2199 if (*retokp)
2200 goto out;
2201
2202 /*
2203 * Now, mark all delegations "need reclaim".
2204 */
2205 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
2206 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
2207
2208 TAILQ_INIT(&extra_deleg);
2209 LIST_INIT(&extra_open);
2210 /*
2211 * Now traverse the state lists, doing Open and Lock Reclaims.
2212 */
2213 tcred = newnfs_getcred();
2214 recovered_one = false;
2215 owp = LIST_FIRST(&clp->nfsc_owner);
2216 while (owp != NULL) {
2217 nowp = LIST_NEXT(owp, nfsow_list);
2218 owp->nfsow_seqid = 0;
2219 op = LIST_FIRST(&owp->nfsow_open);
2220 while (op != NULL) {
2221 nop = LIST_NEXT(op, nfso_list);
2222 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2223 /* Search for a delegation to reclaim with the open */
2224 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2225 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2226 continue;
2227 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2228 mode = NFSV4OPEN_ACCESSWRITE;
2229 delegtype = NFSV4OPEN_DELEGATEWRITE;
2230 } else {
2231 mode = NFSV4OPEN_ACCESSREAD;
2232 delegtype = NFSV4OPEN_DELEGATEREAD;
2233 }
2234 if ((op->nfso_mode & mode) == mode &&
2235 op->nfso_fhlen == dp->nfsdl_fhlen &&
2236 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
2237 break;
2238 }
2239 ndp = dp;
2240 if (dp == NULL)
2241 delegtype = NFSV4OPEN_DELEGATENONE;
2242 newnfs_copycred(&op->nfso_cred, tcred);
2243 error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
2244 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
2245 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
2246 tcred, p);
2247 if (!error) {
2248 recovered_one = true;
2249 /* Handle any replied delegation */
2250 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
2251 || NFSMNT_RDONLY(nmp->nm_mountp))) {
2252 if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
2253 mode = NFSV4OPEN_ACCESSWRITE;
2254 else
2255 mode = NFSV4OPEN_ACCESSREAD;
2256 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2257 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2258 continue;
2259 if ((op->nfso_mode & mode) == mode &&
2260 op->nfso_fhlen == dp->nfsdl_fhlen &&
2261 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
2262 op->nfso_fhlen)) {
2263 dp->nfsdl_stateid = ndp->nfsdl_stateid;
2264 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
2265 dp->nfsdl_ace = ndp->nfsdl_ace;
2266 dp->nfsdl_change = ndp->nfsdl_change;
2267 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2268 if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
2269 dp->nfsdl_flags |= NFSCLDL_RECALL;
2270 free(ndp, M_NFSCLDELEG);
2271 ndp = NULL;
2272 break;
2273 }
2274 }
2275 }
2276 if (ndp != NULL)
2277 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
2278
2279 /* and reclaim all byte range locks */
2280 lp = LIST_FIRST(&op->nfso_lock);
2281 while (lp != NULL) {
2282 nlp = LIST_NEXT(lp, nfsl_list);
2283 lp->nfsl_seqid = 0;
2284 firstlock = 1;
2285 lop = LIST_FIRST(&lp->nfsl_lock);
2286 while (lop != NULL) {
2287 nlop = LIST_NEXT(lop, nfslo_list);
2288 if (lop->nfslo_end == NFS64BITSSET)
2289 len = NFS64BITSSET;
2290 else
2291 len = lop->nfslo_end - lop->nfslo_first;
2292 error = nfscl_trylock(nmp, NULL,
2293 op->nfso_fh, op->nfso_fhlen, lp,
2294 firstlock, 1, lop->nfslo_first, len,
2295 lop->nfslo_type, tcred, p);
2296 if (error != 0)
2297 nfscl_freelock(lop, 0);
2298 else
2299 firstlock = 0;
2300 lop = nlop;
2301 }
2302 /* If no locks, but a lockowner, just delete it. */
2303 if (LIST_EMPTY(&lp->nfsl_lock))
2304 nfscl_freelockowner(lp, 0);
2305 lp = nlp;
2306 }
2307 } else if (error == NFSERR_NOGRACE && !recovered_one &&
2308 NFSHASNFSV4N(nmp)) {
2309 /*
2310 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will
2311 * actually end up here, since the client will do
2312 * a recovery for NFSERR_BADSESSION, but will get
2313 * an NFSERR_NOGRACE reply for the first "reclaim"
2314 * attempt.
2315 * So, call nfscl_expireclient() to recover the
2316 * opens as best we can and then do a reclaim
2317 * complete and return.
2318 */
2319 nfsrpc_reclaimcomplete(nmp, cred, p);
2320 nfscl_expireclient(clp, nmp, tcred, p);
2321 goto out;
2322 }
2323 }
2324 if (error != 0 && error != NFSERR_BADSESSION)
2325 nfscl_freeopen(op, 0, true);
2326 op = nop;
2327 }
2328 owp = nowp;
2329 }
2330
2331 /*
2332 * Now, try and get any delegations not yet reclaimed by cobbling
2333 * to-gether an appropriate open.
2334 */
2335 nowp = NULL;
2336 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2337 while (dp != NULL) {
2338 ndp = TAILQ_NEXT(dp, nfsdl_list);
2339 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2340 if (nowp == NULL) {
2341 nowp = malloc(
2342 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2343 /*
2344 * Name must be as long an largest possible
2345 * NFSV4CL_LOCKNAMELEN. 12 for now.
2346 */
2347 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2348 NFSV4CL_LOCKNAMELEN);
2349 LIST_INIT(&nowp->nfsow_open);
2350 nowp->nfsow_clp = clp;
2351 nowp->nfsow_seqid = 0;
2352 nowp->nfsow_defunct = 0;
2353 nfscl_lockinit(&nowp->nfsow_rwlock);
2354 }
2355 nop = NULL;
2356 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2357 nop = malloc(sizeof (struct nfsclopen) +
2358 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2359 nop->nfso_own = nowp;
2360 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2361 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2362 delegtype = NFSV4OPEN_DELEGATEWRITE;
2363 } else {
2364 nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2365 delegtype = NFSV4OPEN_DELEGATEREAD;
2366 }
2367 nop->nfso_opencnt = 0;
2368 nop->nfso_posixlock = 1;
2369 nop->nfso_fhlen = dp->nfsdl_fhlen;
2370 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2371 LIST_INIT(&nop->nfso_lock);
2372 nop->nfso_stateid.seqid = 0;
2373 nop->nfso_stateid.other[0] = 0;
2374 nop->nfso_stateid.other[1] = 0;
2375 nop->nfso_stateid.other[2] = 0;
2376 newnfs_copycred(&dp->nfsdl_cred, tcred);
2377 newnfs_copyincred(tcred, &nop->nfso_cred);
2378 tdp = NULL;
2379 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2380 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2381 nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2382 delegtype, tcred, p);
2383 if (tdp != NULL) {
2384 if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2385 mode = NFSV4OPEN_ACCESSWRITE;
2386 else
2387 mode = NFSV4OPEN_ACCESSREAD;
2388 if ((nop->nfso_mode & mode) == mode &&
2389 nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2390 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2391 nop->nfso_fhlen)) {
2392 dp->nfsdl_stateid = tdp->nfsdl_stateid;
2393 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2394 dp->nfsdl_ace = tdp->nfsdl_ace;
2395 dp->nfsdl_change = tdp->nfsdl_change;
2396 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2397 if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2398 dp->nfsdl_flags |= NFSCLDL_RECALL;
2399 free(tdp, M_NFSCLDELEG);
2400 } else {
2401 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2402 }
2403 }
2404 }
2405 if (error) {
2406 if (nop != NULL)
2407 free(nop, M_NFSCLOPEN);
2408 if (error == NFSERR_NOGRACE && !recovered_one &&
2409 NFSHASNFSV4N(nmp)) {
2410 /*
2411 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will
2412 * actually end up here, since the client will do
2413 * a recovery for NFSERR_BADSESSION, but will get
2414 * an NFSERR_NOGRACE reply for the first "reclaim"
2415 * attempt.
2416 * So, call nfscl_expireclient() to recover the
2417 * opens as best we can and then do a reclaim
2418 * complete and return.
2419 */
2420 nfsrpc_reclaimcomplete(nmp, cred, p);
2421 nfscl_expireclient(clp, nmp, tcred, p);
2422 free(nowp, M_NFSCLOWNER);
2423 goto out;
2424 }
2425 /*
2426 * Couldn't reclaim it, so throw the state
2427 * away. Ouch!!
2428 */
2429 nfscl_cleandeleg(dp);
2430 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
2431 } else {
2432 recovered_one = true;
2433 LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2434 }
2435 }
2436 dp = ndp;
2437 }
2438
2439 /*
2440 * Now, get rid of extra Opens and Delegations.
2441 */
2442 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2443 do {
2444 newnfs_copycred(&op->nfso_cred, tcred);
2445 error = nfscl_tryclose(op, tcred, nmp, p, true);
2446 if (error == NFSERR_GRACE)
2447 (void) nfs_catnap(PZERO, error, "nfsexcls");
2448 } while (error == NFSERR_GRACE);
2449 LIST_REMOVE(op, nfso_list);
2450 free(op, M_NFSCLOPEN);
2451 }
2452 if (nowp != NULL)
2453 free(nowp, M_NFSCLOWNER);
2454
2455 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2456 do {
2457 newnfs_copycred(&dp->nfsdl_cred, tcred);
2458 error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2459 if (error == NFSERR_GRACE)
2460 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2461 } while (error == NFSERR_GRACE);
2462 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2463 free(dp, M_NFSCLDELEG);
2464 }
2465
2466 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
2467 if (NFSHASNFSV4N(nmp))
2468 (void)nfsrpc_reclaimcomplete(nmp, cred, p);
2469
2470 out:
2471 NFSLOCKCLSTATE();
2472 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2473 wakeup(&clp->nfsc_flags);
2474 nfsv4_unlock(&clp->nfsc_lock, 0);
2475 NFSUNLOCKCLSTATE();
2476 if (tcred != NULL)
2477 NFSFREECRED(tcred);
2478 }
2479
2480 /*
2481 * This function is called when a server replies with NFSERR_EXPIRED.
2482 * It deletes all state for the client and does a fresh SetClientId/confirm.
2483 * XXX Someday it should post a signal to the process(es) that hold the
2484 * state, so they know that lock state has been lost.
2485 */
2486 int
2487 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2488 {
2489 struct nfsmount *nmp;
2490 struct ucred *cred;
2491 int igotlock = 0, error, trycnt;
2492
2493 /*
2494 * If the clientid has gone away or a new SetClientid has already
2495 * been done, just return ok.
2496 */
2497 if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2498 return (0);
2499
2500 /*
2501 * First, lock the client structure, so everyone else will
2502 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2503 * that only one thread does the work.
2504 */
2505 NFSLOCKCLSTATE();
2506 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2507 do {
2508 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2509 NFSCLSTATEMUTEXPTR, NULL);
2510 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2511 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2512 if (igotlock)
2513 nfsv4_unlock(&clp->nfsc_lock, 0);
2514 NFSUNLOCKCLSTATE();
2515 return (0);
2516 }
2517 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2518 NFSUNLOCKCLSTATE();
2519
2520 nmp = clp->nfsc_nmp;
2521 if (nmp == NULL)
2522 panic("nfscl expired");
2523 cred = newnfs_getcred();
2524 trycnt = 5;
2525 do {
2526 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
2527 } while ((error == NFSERR_STALECLIENTID ||
2528 error == NFSERR_BADSESSION ||
2529 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2530 if (error) {
2531 NFSLOCKCLSTATE();
2532 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2533 } else {
2534 /*
2535 * Expire the state for the client.
2536 */
2537 nfscl_expireclient(clp, nmp, cred, p);
2538 NFSLOCKCLSTATE();
2539 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2540 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2541 }
2542 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2543 wakeup(&clp->nfsc_flags);
2544 nfsv4_unlock(&clp->nfsc_lock, 0);
2545 NFSUNLOCKCLSTATE();
2546 NFSFREECRED(cred);
2547 return (error);
2548 }
2549
2550 /*
2551 * This function inserts a lock in the list after insert_lop.
2552 */
2553 static void
2554 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2555 struct nfscllock *insert_lop, int local)
2556 {
2557
2558 if ((struct nfscllockowner *)insert_lop == lp)
2559 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2560 else
2561 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2562 if (local)
2563 nfsstatsv1.cllocallocks++;
2564 else
2565 nfsstatsv1.cllocks++;
2566 }
2567
2568 /*
2569 * This function updates the locking for a lock owner and given file. It
2570 * maintains a list of lock ranges ordered on increasing file offset that
2571 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2572 * It always adds new_lop to the list and sometimes uses the one pointed
2573 * at by other_lopp.
2574 * Returns 1 if the locks were modified, 0 otherwise.
2575 */
2576 static int
2577 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2578 struct nfscllock **other_lopp, int local)
2579 {
2580 struct nfscllock *new_lop = *new_lopp;
2581 struct nfscllock *lop, *tlop, *ilop;
2582 struct nfscllock *other_lop;
2583 int unlock = 0, modified = 0;
2584 u_int64_t tmp;
2585
2586 /*
2587 * Work down the list until the lock is merged.
2588 */
2589 if (new_lop->nfslo_type == F_UNLCK)
2590 unlock = 1;
2591 ilop = (struct nfscllock *)lp;
2592 lop = LIST_FIRST(&lp->nfsl_lock);
2593 while (lop != NULL) {
2594 /*
2595 * Only check locks for this file that aren't before the start of
2596 * new lock's range.
2597 */
2598 if (lop->nfslo_end >= new_lop->nfslo_first) {
2599 if (new_lop->nfslo_end < lop->nfslo_first) {
2600 /*
2601 * If the new lock ends before the start of the
2602 * current lock's range, no merge, just insert
2603 * the new lock.
2604 */
2605 break;
2606 }
2607 if (new_lop->nfslo_type == lop->nfslo_type ||
2608 (new_lop->nfslo_first <= lop->nfslo_first &&
2609 new_lop->nfslo_end >= lop->nfslo_end)) {
2610 /*
2611 * This lock can be absorbed by the new lock/unlock.
2612 * This happens when it covers the entire range
2613 * of the old lock or is contiguous
2614 * with the old lock and is of the same type or an
2615 * unlock.
2616 */
2617 if (new_lop->nfslo_type != lop->nfslo_type ||
2618 new_lop->nfslo_first != lop->nfslo_first ||
2619 new_lop->nfslo_end != lop->nfslo_end)
2620 modified = 1;
2621 if (lop->nfslo_first < new_lop->nfslo_first)
2622 new_lop->nfslo_first = lop->nfslo_first;
2623 if (lop->nfslo_end > new_lop->nfslo_end)
2624 new_lop->nfslo_end = lop->nfslo_end;
2625 tlop = lop;
2626 lop = LIST_NEXT(lop, nfslo_list);
2627 nfscl_freelock(tlop, local);
2628 continue;
2629 }
2630
2631 /*
2632 * All these cases are for contiguous locks that are not the
2633 * same type, so they can't be merged.
2634 */
2635 if (new_lop->nfslo_first <= lop->nfslo_first) {
2636 /*
2637 * This case is where the new lock overlaps with the
2638 * first part of the old lock. Move the start of the
2639 * old lock to just past the end of the new lock. The
2640 * new lock will be inserted in front of the old, since
2641 * ilop hasn't been updated. (We are done now.)
2642 */
2643 if (lop->nfslo_first != new_lop->nfslo_end) {
2644 lop->nfslo_first = new_lop->nfslo_end;
2645 modified = 1;
2646 }
2647 break;
2648 }
2649 if (new_lop->nfslo_end >= lop->nfslo_end) {
2650 /*
2651 * This case is where the new lock overlaps with the
2652 * end of the old lock's range. Move the old lock's
2653 * end to just before the new lock's first and insert
2654 * the new lock after the old lock.
2655 * Might not be done yet, since the new lock could
2656 * overlap further locks with higher ranges.
2657 */
2658 if (lop->nfslo_end != new_lop->nfslo_first) {
2659 lop->nfslo_end = new_lop->nfslo_first;
2660 modified = 1;
2661 }
2662 ilop = lop;
2663 lop = LIST_NEXT(lop, nfslo_list);
2664 continue;
2665 }
2666 /*
2667 * The final case is where the new lock's range is in the
2668 * middle of the current lock's and splits the current lock
2669 * up. Use *other_lopp to handle the second part of the
2670 * split old lock range. (We are done now.)
2671 * For unlock, we use new_lop as other_lop and tmp, since
2672 * other_lop and new_lop are the same for this case.
2673 * We noted the unlock case above, so we don't need
2674 * new_lop->nfslo_type any longer.
2675 */
2676 tmp = new_lop->nfslo_first;
2677 if (unlock) {
2678 other_lop = new_lop;
2679 *new_lopp = NULL;
2680 } else {
2681 other_lop = *other_lopp;
2682 *other_lopp = NULL;
2683 }
2684 other_lop->nfslo_first = new_lop->nfslo_end;
2685 other_lop->nfslo_end = lop->nfslo_end;
2686 other_lop->nfslo_type = lop->nfslo_type;
2687 lop->nfslo_end = tmp;
2688 nfscl_insertlock(lp, other_lop, lop, local);
2689 ilop = lop;
2690 modified = 1;
2691 break;
2692 }
2693 ilop = lop;
2694 lop = LIST_NEXT(lop, nfslo_list);
2695 if (lop == NULL)
2696 break;
2697 }
2698
2699 /*
2700 * Insert the new lock in the list at the appropriate place.
2701 */
2702 if (!unlock) {
2703 nfscl_insertlock(lp, new_lop, ilop, local);
2704 *new_lopp = NULL;
2705 modified = 1;
2706 }
2707 return (modified);
2708 }
2709
2710 /*
2711 * This function must be run as a kernel thread.
2712 * It does Renew Ops and recovery, when required.
2713 */
2714 void
2715 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2716 {
2717 struct nfsclowner *owp, *nowp;
2718 struct nfsclopen *op;
2719 struct nfscllockowner *lp, *nlp;
2720 struct nfscldeleghead dh;
2721 struct nfscldeleg *dp, *ndp;
2722 struct ucred *cred;
2723 u_int32_t clidrev;
2724 int error, cbpathdown, islept, igotlock, ret, clearok;
2725 uint32_t recover_done_time = 0;
2726 time_t mytime;
2727 static time_t prevsec = 0;
2728 struct nfscllockownerfh *lfhp, *nlfhp;
2729 struct nfscllockownerfhhead lfh;
2730 struct nfscllayout *lyp, *nlyp;
2731 struct nfscldevinfo *dip, *ndip;
2732 struct nfscllayouthead rlh;
2733 struct nfsclrecalllayout *recallp;
2734 struct nfsclds *dsp;
2735 bool retok;
2736 struct mount *mp;
2737 vnode_t vp;
2738
2739 cred = newnfs_getcred();
2740 NFSLOCKCLSTATE();
2741 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2742 mp = clp->nfsc_nmp->nm_mountp;
2743 NFSUNLOCKCLSTATE();
2744 for(;;) {
2745 newnfs_setroot(cred);
2746 cbpathdown = 0;
2747 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2748 /*
2749 * Only allow one full recover within 1/2 of the lease
2750 * duration (nfsc_renew).
2751 * retok is value/result. If passed in set to true,
2752 * it indicates only a CreateSession operation should
2753 * be attempted.
2754 * If it is returned true, it indicates that the
2755 * recovery only required a CreateSession.
2756 */
2757 retok = true;
2758 if (recover_done_time < NFSD_MONOSEC) {
2759 recover_done_time = NFSD_MONOSEC +
2760 clp->nfsc_renew;
2761 retok = false;
2762 }
2763 NFSCL_DEBUG(1, "Doing recovery, only "
2764 "createsession=%d\n", retok);
2765 nfscl_recover(clp, &retok, cred, p);
2766 }
2767 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2768 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2769 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2770 clidrev = clp->nfsc_clientidrev;
2771 error = nfsrpc_renew(clp, NULL, cred, p);
2772 if (error == NFSERR_CBPATHDOWN)
2773 cbpathdown = 1;
2774 else if (error == NFSERR_STALECLIENTID) {
2775 NFSLOCKCLSTATE();
2776 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2777 NFSUNLOCKCLSTATE();
2778 } else if (error == NFSERR_EXPIRED)
2779 (void) nfscl_hasexpired(clp, clidrev, p);
2780 }
2781
2782 checkdsrenew:
2783 if (NFSHASNFSV4N(clp->nfsc_nmp)) {
2784 /* Do renews for any DS sessions. */
2785 NFSLOCKMNT(clp->nfsc_nmp);
2786 /* Skip first entry, since the MDS is handled above. */
2787 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
2788 if (dsp != NULL)
2789 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2790 while (dsp != NULL) {
2791 if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
2792 dsp->nfsclds_sess.nfsess_defunct == 0) {
2793 dsp->nfsclds_expire = NFSD_MONOSEC +
2794 clp->nfsc_renew;
2795 NFSUNLOCKMNT(clp->nfsc_nmp);
2796 (void)nfsrpc_renew(clp, dsp, cred, p);
2797 goto checkdsrenew;
2798 }
2799 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2800 }
2801 NFSUNLOCKMNT(clp->nfsc_nmp);
2802 }
2803
2804 TAILQ_INIT(&dh);
2805 NFSLOCKCLSTATE();
2806 if (cbpathdown)
2807 /* It's a Total Recall! */
2808 nfscl_totalrecall(clp);
2809
2810 /*
2811 * Now, handle defunct owners.
2812 */
2813 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2814 if (LIST_EMPTY(&owp->nfsow_open)) {
2815 if (owp->nfsow_defunct != 0)
2816 nfscl_freeopenowner(owp, 0);
2817 }
2818 }
2819
2820 /*
2821 * Do the recall on any delegations. To avoid trouble, always
2822 * come back up here after having slept.
2823 */
2824 igotlock = 0;
2825 tryagain:
2826 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2827 while (dp != NULL) {
2828 ndp = TAILQ_NEXT(dp, nfsdl_list);
2829 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2830 /*
2831 * Wait for outstanding I/O ops to be done.
2832 */
2833 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2834 if (igotlock) {
2835 nfsv4_unlock(&clp->nfsc_lock, 0);
2836 igotlock = 0;
2837 }
2838 dp->nfsdl_rwlock.nfslock_lock |=
2839 NFSV4LOCK_WANTED;
2840 msleep(&dp->nfsdl_rwlock,
2841 NFSCLSTATEMUTEXPTR, PVFS, "nfscld",
2842 5 * hz);
2843 if (NFSCL_FORCEDISM(mp))
2844 goto terminate;
2845 goto tryagain;
2846 }
2847 while (!igotlock) {
2848 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2849 &islept, NFSCLSTATEMUTEXPTR, mp);
2850 if (igotlock == 0 && NFSCL_FORCEDISM(mp))
2851 goto terminate;
2852 if (islept)
2853 goto tryagain;
2854 }
2855 NFSUNLOCKCLSTATE();
2856 newnfs_copycred(&dp->nfsdl_cred, cred);
2857 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2858 NULL, cred, p, 1, &vp);
2859 if (!ret) {
2860 nfscl_cleandeleg(dp);
2861 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2862 nfsdl_list);
2863 LIST_REMOVE(dp, nfsdl_hash);
2864 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2865 nfscl_delegcnt--;
2866 nfsstatsv1.cldelegates--;
2867 }
2868 NFSLOCKCLSTATE();
2869 /*
2870 * The nfsc_lock must be released before doing
2871 * vrele(), since it might call nfs_inactive().
2872 * For the unlikely case where the vnode failed
2873 * to be acquired by nfscl_recalldeleg(), a
2874 * VOP_RECLAIM() should be in progress and it
2875 * will return the delegation.
2876 */
2877 nfsv4_unlock(&clp->nfsc_lock, 0);
2878 igotlock = 0;
2879 if (vp != NULL) {
2880 NFSUNLOCKCLSTATE();
2881 vrele(vp);
2882 NFSLOCKCLSTATE();
2883 }
2884 goto tryagain;
2885 }
2886 dp = ndp;
2887 }
2888
2889 /*
2890 * Clear out old delegations, if we are above the high water
2891 * mark. Only clear out ones with no state related to them.
2892 * The tailq list is in LRU order.
2893 */
2894 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2895 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2896 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2897 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2898 dp->nfsdl_rwlock.nfslock_lock == 0 &&
2899 dp->nfsdl_timestamp < NFSD_MONOSEC &&
2900 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2901 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2902 clearok = 1;
2903 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2904 op = LIST_FIRST(&owp->nfsow_open);
2905 if (op != NULL) {
2906 clearok = 0;
2907 break;
2908 }
2909 }
2910 if (clearok) {
2911 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2912 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2913 clearok = 0;
2914 break;
2915 }
2916 }
2917 }
2918 if (clearok) {
2919 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2920 LIST_REMOVE(dp, nfsdl_hash);
2921 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2922 nfscl_delegcnt--;
2923 nfsstatsv1.cldelegates--;
2924 }
2925 }
2926 dp = ndp;
2927 }
2928 if (igotlock)
2929 nfsv4_unlock(&clp->nfsc_lock, 0);
2930
2931 /*
2932 * Do the recall on any layouts. To avoid trouble, always
2933 * come back up here after having slept.
2934 */
2935 TAILQ_INIT(&rlh);
2936 tryagain2:
2937 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
2938 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
2939 /*
2940 * Wait for outstanding I/O ops to be done.
2941 */
2942 if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
2943 (lyp->nfsly_lock.nfslock_lock &
2944 NFSV4LOCK_LOCK) != 0) {
2945 lyp->nfsly_lock.nfslock_lock |=
2946 NFSV4LOCK_WANTED;
2947 msleep(&lyp->nfsly_lock.nfslock_lock,
2948 NFSCLSTATEMUTEXPTR, PVFS, "nfslyp",
2949 5 * hz);
2950 if (NFSCL_FORCEDISM(mp))
2951 goto terminate;
2952 goto tryagain2;
2953 }
2954 /* Move the layout to the recall list. */
2955 TAILQ_REMOVE(&clp->nfsc_layout, lyp,
2956 nfsly_list);
2957 LIST_REMOVE(lyp, nfsly_hash);
2958 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
2959
2960 /* Handle any layout commits. */
2961 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
2962 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
2963 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
2964 NFSUNLOCKCLSTATE();
2965 NFSCL_DEBUG(3, "do layoutcommit\n");
2966 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
2967 cred, p);
2968 NFSLOCKCLSTATE();
2969 goto tryagain2;
2970 }
2971 }
2972 }
2973
2974 /* Now, look for stale layouts. */
2975 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
2976 while (lyp != NULL) {
2977 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
2978 if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
2979 (lyp->nfsly_flags & (NFSLY_RECALL |
2980 NFSLY_RETONCLOSE)) == 0 &&
2981 lyp->nfsly_lock.nfslock_usecnt == 0 &&
2982 lyp->nfsly_lock.nfslock_lock == 0) {
2983 NFSCL_DEBUG(4, "ret stale lay=%d\n",
2984 nfscl_layoutcnt);
2985 recallp = malloc(sizeof(*recallp),
2986 M_NFSLAYRECALL, M_NOWAIT);
2987 if (recallp == NULL)
2988 break;
2989 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
2990 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
2991 lyp->nfsly_stateid.seqid, 0, 0, NULL,
2992 recallp);
2993 }
2994 lyp = nlyp;
2995 }
2996
2997 /*
2998 * Free up any unreferenced device info structures.
2999 */
3000 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
3001 if (dip->nfsdi_layoutrefs == 0 &&
3002 dip->nfsdi_refcnt == 0) {
3003 NFSCL_DEBUG(4, "freeing devinfo\n");
3004 LIST_REMOVE(dip, nfsdi_list);
3005 nfscl_freedevinfo(dip);
3006 }
3007 }
3008 NFSUNLOCKCLSTATE();
3009
3010 /* Do layout return(s), as required. */
3011 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
3012 TAILQ_REMOVE(&rlh, lyp, nfsly_list);
3013 NFSCL_DEBUG(4, "ret layout\n");
3014 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
3015 if ((lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) {
3016 NFSLOCKCLSTATE();
3017 lyp->nfsly_flags |= NFSLY_RETURNED;
3018 wakeup(lyp);
3019 NFSUNLOCKCLSTATE();
3020 } else
3021 nfscl_freelayout(lyp);
3022 }
3023
3024 /*
3025 * Delegreturn any delegations cleaned out or recalled.
3026 */
3027 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
3028 newnfs_copycred(&dp->nfsdl_cred, cred);
3029 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3030 TAILQ_REMOVE(&dh, dp, nfsdl_list);
3031 free(dp, M_NFSCLDELEG);
3032 }
3033
3034 SLIST_INIT(&lfh);
3035 /*
3036 * Call nfscl_cleanupkext() once per second to check for
3037 * open/lock owners where the process has exited.
3038 */
3039 mytime = NFSD_MONOSEC;
3040 if (prevsec != mytime) {
3041 prevsec = mytime;
3042 nfscl_cleanupkext(clp, &lfh);
3043 }
3044
3045 /*
3046 * Do a ReleaseLockOwner for all lock owners where the
3047 * associated process no longer exists, as found by
3048 * nfscl_cleanupkext().
3049 */
3050 newnfs_setroot(cred);
3051 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
3052 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
3053 nlp) {
3054 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
3055 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
3056 p);
3057 nfscl_freelockowner(lp, 0);
3058 }
3059 free(lfhp, M_TEMP);
3060 }
3061 SLIST_INIT(&lfh);
3062
3063 NFSLOCKCLSTATE();
3064 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
3065 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
3066 hz);
3067 terminate:
3068 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
3069 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
3070 NFSUNLOCKCLSTATE();
3071 NFSFREECRED(cred);
3072 wakeup((caddr_t)clp);
3073 return;
3074 }
3075 NFSUNLOCKCLSTATE();
3076 }
3077 }
3078
3079 /*
3080 * Initiate state recovery. Called when NFSERR_STALECLIENTID,
3081 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
3082 */
3083 void
3084 nfscl_initiate_recovery(struct nfsclclient *clp)
3085 {
3086
3087 if (clp == NULL)
3088 return;
3089 NFSLOCKCLSTATE();
3090 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
3091 NFSUNLOCKCLSTATE();
3092 wakeup((caddr_t)clp);
3093 }
3094
3095 /*
3096 * Dump out the state stuff for debugging.
3097 */
3098 void
3099 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
3100 int lockowner, int locks)
3101 {
3102 struct nfsclclient *clp;
3103 struct nfsclowner *owp;
3104 struct nfsclopen *op;
3105 struct nfscllockowner *lp;
3106 struct nfscllock *lop;
3107 struct nfscldeleg *dp;
3108
3109 clp = nmp->nm_clp;
3110 if (clp == NULL) {
3111 printf("nfscl dumpstate NULL clp\n");
3112 return;
3113 }
3114 NFSLOCKCLSTATE();
3115 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
3116 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3117 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
3118 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
3119 owp->nfsow_owner[0], owp->nfsow_owner[1],
3120 owp->nfsow_owner[2], owp->nfsow_owner[3],
3121 owp->nfsow_seqid);
3122 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3123 if (opens)
3124 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
3125 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
3126 op->nfso_stateid.other[2], op->nfso_opencnt,
3127 op->nfso_fh[12]);
3128 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
3129 if (lockowner)
3130 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
3131 lp->nfsl_owner[0], lp->nfsl_owner[1],
3132 lp->nfsl_owner[2], lp->nfsl_owner[3],
3133 lp->nfsl_seqid,
3134 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
3135 lp->nfsl_stateid.other[2]);
3136 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3137 if (locks)
3138 #ifdef __FreeBSD__
3139 printf("lck typ=%d fst=%ju end=%ju\n",
3140 lop->nfslo_type, (intmax_t)lop->nfslo_first,
3141 (intmax_t)lop->nfslo_end);
3142 #else
3143 printf("lck typ=%d fst=%qd end=%qd\n",
3144 lop->nfslo_type, lop->nfslo_first,
3145 lop->nfslo_end);
3146 #endif
3147 }
3148 }
3149 }
3150 }
3151 }
3152 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3153 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
3154 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
3155 owp->nfsow_owner[0], owp->nfsow_owner[1],
3156 owp->nfsow_owner[2], owp->nfsow_owner[3],
3157 owp->nfsow_seqid);
3158 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3159 if (opens)
3160 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
3161 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
3162 op->nfso_stateid.other[2], op->nfso_opencnt,
3163 op->nfso_fh[12]);
3164 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
3165 if (lockowner)
3166 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
3167 lp->nfsl_owner[0], lp->nfsl_owner[1],
3168 lp->nfsl_owner[2], lp->nfsl_owner[3],
3169 lp->nfsl_seqid,
3170 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
3171 lp->nfsl_stateid.other[2]);
3172 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3173 if (locks)
3174 #ifdef __FreeBSD__
3175 printf("lck typ=%d fst=%ju end=%ju\n",
3176 lop->nfslo_type, (intmax_t)lop->nfslo_first,
3177 (intmax_t)lop->nfslo_end);
3178 #else
3179 printf("lck typ=%d fst=%qd end=%qd\n",
3180 lop->nfslo_type, lop->nfslo_first,
3181 lop->nfslo_end);
3182 #endif
3183 }
3184 }
3185 }
3186 }
3187 NFSUNLOCKCLSTATE();
3188 }
3189
3190 /*
3191 * Check for duplicate open owners and opens.
3192 * (Only used as a diagnostic aid.)
3193 */
3194 void
3195 nfscl_dupopen(vnode_t vp, int dupopens)
3196 {
3197 struct nfsclclient *clp;
3198 struct nfsclowner *owp, *owp2;
3199 struct nfsclopen *op, *op2;
3200 struct nfsfh *nfhp;
3201
3202 clp = VFSTONFS(vp->v_mount)->nm_clp;
3203 if (clp == NULL) {
3204 printf("nfscl dupopen NULL clp\n");
3205 return;
3206 }
3207 nfhp = VTONFS(vp)->n_fhp;
3208 NFSLOCKCLSTATE();
3209
3210 /*
3211 * First, search for duplicate owners.
3212 * These should never happen!
3213 */
3214 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3215 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3216 if (owp != owp2 &&
3217 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
3218 NFSV4CL_LOCKNAMELEN)) {
3219 NFSUNLOCKCLSTATE();
3220 printf("DUP OWNER\n");
3221 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
3222 return;
3223 }
3224 }
3225 }
3226
3227 /*
3228 * Now, search for duplicate stateids.
3229 * These shouldn't happen, either.
3230 */
3231 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3232 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3233 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3234 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3235 if (op != op2 &&
3236 (op->nfso_stateid.other[0] != 0 ||
3237 op->nfso_stateid.other[1] != 0 ||
3238 op->nfso_stateid.other[2] != 0) &&
3239 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
3240 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
3241 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
3242 NFSUNLOCKCLSTATE();
3243 printf("DUP STATEID\n");
3244 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
3245 return;
3246 }
3247 }
3248 }
3249 }
3250 }
3251
3252 /*
3253 * Now search for duplicate opens.
3254 * Duplicate opens for the same owner
3255 * should never occur. Other duplicates are
3256 * possible and are checked for if "dupopens"
3257 * is true.
3258 */
3259 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3260 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3261 if (nfhp->nfh_len == op2->nfso_fhlen &&
3262 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
3263 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3264 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3265 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
3266 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
3267 (!NFSBCMP(op->nfso_own->nfsow_owner,
3268 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
3269 dupopens)) {
3270 if (!NFSBCMP(op->nfso_own->nfsow_owner,
3271 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3272 NFSUNLOCKCLSTATE();
3273 printf("BADDUP OPEN\n");
3274 } else {
3275 NFSUNLOCKCLSTATE();
3276 printf("DUP OPEN\n");
3277 }
3278 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0,
3279 0);
3280 return;
3281 }
3282 }
3283 }
3284 }
3285 }
3286 }
3287 NFSUNLOCKCLSTATE();
3288 }
3289
3290 /*
3291 * During close, find an open that needs to be dereferenced and
3292 * dereference it. If there are no more opens for this file,
3293 * log a message to that effect.
3294 * Opens aren't actually Close'd until VOP_INACTIVE() is performed
3295 * on the file's vnode.
3296 * This is the safe way, since it is difficult to identify
3297 * which open the close is for and I/O can be performed after the
3298 * close(2) system call when a file is mmap'd.
3299 * If it returns 0 for success, there will be a referenced
3300 * clp returned via clpp.
3301 */
3302 int
3303 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
3304 {
3305 struct nfsclclient *clp;
3306 struct nfsclowner *owp;
3307 struct nfsclopen *op;
3308 struct nfscldeleg *dp;
3309 struct nfsfh *nfhp;
3310 int error, notdecr;
3311
3312 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
3313 if (error)
3314 return (error);
3315 *clpp = clp;
3316
3317 nfhp = VTONFS(vp)->n_fhp;
3318 notdecr = 1;
3319 NFSLOCKCLSTATE();
3320 /*
3321 * First, look for one under a delegation that was locally issued
3322 * and just decrement the opencnt for it. Since all my Opens against
3323 * the server are DENY_NONE, I don't see a problem with hanging
3324 * onto them. (It is much easier to use one of the extant Opens
3325 * that I already have on the server when a Delegation is recalled
3326 * than to do fresh Opens.) Someday, I might need to rethink this, but.
3327 */
3328 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3329 if (dp != NULL) {
3330 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3331 op = LIST_FIRST(&owp->nfsow_open);
3332 if (op != NULL) {
3333 /*
3334 * Since a delegation is for a file, there
3335 * should never be more than one open for
3336 * each openowner.
3337 */
3338 if (LIST_NEXT(op, nfso_list) != NULL)
3339 panic("nfscdeleg opens");
3340 if (notdecr && op->nfso_opencnt > 0) {
3341 notdecr = 0;
3342 op->nfso_opencnt--;
3343 break;
3344 }
3345 }
3346 }
3347 }
3348
3349 /* Now process the opens against the server. */
3350 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
3351 nfso_hash) {
3352 if (op->nfso_fhlen == nfhp->nfh_len &&
3353 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3354 nfhp->nfh_len)) {
3355 /* Found an open, decrement cnt if possible */
3356 if (notdecr && op->nfso_opencnt > 0) {
3357 notdecr = 0;
3358 op->nfso_opencnt--;
3359 }
3360 /*
3361 * There are more opens, so just return.
3362 */
3363 if (op->nfso_opencnt > 0) {
3364 NFSUNLOCKCLSTATE();
3365 return (0);
3366 }
3367 }
3368 }
3369 NFSUNLOCKCLSTATE();
3370 if (notdecr)
3371 printf("nfscl: never fnd open\n");
3372 return (0);
3373 }
3374
3375 int
3376 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
3377 {
3378 struct nfsclclient *clp;
3379 struct nfsmount *nmp;
3380 struct nfsclowner *owp, *nowp;
3381 struct nfsclopen *op, *nop;
3382 struct nfsclopenhead delayed;
3383 struct nfscldeleg *dp;
3384 struct nfsfh *nfhp;
3385 struct nfsclrecalllayout *recallp;
3386 struct nfscllayout *lyp;
3387 int error;
3388
3389 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
3390 if (error)
3391 return (error);
3392 *clpp = clp;
3393
3394 nmp = VFSTONFS(vp->v_mount);
3395 nfhp = VTONFS(vp)->n_fhp;
3396 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
3397 NFSLOCKCLSTATE();
3398 /*
3399 * First get rid of the local Open structures, which should be no
3400 * longer in use.
3401 */
3402 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3403 if (dp != NULL) {
3404 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
3405 op = LIST_FIRST(&owp->nfsow_open);
3406 if (op != NULL) {
3407 KASSERT((op->nfso_opencnt == 0),
3408 ("nfscl: bad open cnt on deleg"));
3409 nfscl_freeopen(op, 1, true);
3410 }
3411 nfscl_freeopenowner(owp, 1);
3412 }
3413 }
3414
3415 /* Return any layouts marked return on close. */
3416 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp,
3417 &lyp);
3418
3419 /* Now process the opens against the server. */
3420 LIST_INIT(&delayed);
3421 lookformore:
3422 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
3423 nfso_hash) {
3424 if (op->nfso_fhlen == nfhp->nfh_len &&
3425 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3426 nfhp->nfh_len)) {
3427 /* Found an open, close it. */
3428 #ifdef DIAGNOSTIC
3429 KASSERT((op->nfso_opencnt == 0),
3430 ("nfscl: bad open cnt on server (%d)",
3431 op->nfso_opencnt));
3432 #endif
3433 NFSUNLOCKCLSTATE();
3434 if (NFSHASNFSV4N(nmp))
3435 error = nfsrpc_doclose(nmp, op, p, false, true);
3436 else
3437 error = nfsrpc_doclose(nmp, op, p, true, true);
3438 NFSLOCKCLSTATE();
3439 if (error == NFSERR_DELAY) {
3440 nfscl_unlinkopen(op);
3441 op->nfso_own = NULL;
3442 LIST_INSERT_HEAD(&delayed, op, nfso_list);
3443 }
3444 goto lookformore;
3445 }
3446 }
3447 nfscl_clrelease(clp);
3448
3449 /* Now, wait for any layout that is returned upon close. */
3450 if (lyp != NULL) {
3451 while ((lyp->nfsly_flags & NFSLY_RETURNED) == 0) {
3452 if (NFSCL_FORCEDISM(nmp->nm_mountp)) {
3453 lyp = NULL;
3454 break;
3455 }
3456 msleep(lyp, NFSCLSTATEMUTEXPTR, PZERO, "nfslroc", hz);
3457 }
3458 if (lyp != NULL)
3459 nfscl_freelayout(lyp);
3460 }
3461
3462 NFSUNLOCKCLSTATE();
3463 /*
3464 * recallp has been set NULL by nfscl_retoncloselayout() if it was
3465 * used by the function, but calling free() with a NULL pointer is ok.
3466 */
3467 free(recallp, M_NFSLAYRECALL);
3468
3469 /* Now, loop retrying the delayed closes. */
3470 LIST_FOREACH_SAFE(op, &delayed, nfso_list, nop) {
3471 nfsrpc_doclose(nmp, op, p, true, false);
3472 LIST_REMOVE(op, nfso_list);
3473 nfscl_freeopen(op, 0, false);
3474 }
3475 return (0);
3476 }
3477
3478 /*
3479 * Return all delegations on this client.
3480 * (Must be called with client sleep lock.)
3481 */
3482 static void
3483 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p,
3484 struct nfscldeleghead *dhp)
3485 {
3486 struct nfscldeleg *dp, *ndp;
3487 struct ucred *cred;
3488
3489 cred = newnfs_getcred();
3490 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3491 nfscl_cleandeleg(dp);
3492 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3493 if (dhp != NULL) {
3494 nfscl_freedeleg(&clp->nfsc_deleg, dp, false);
3495 TAILQ_INSERT_HEAD(dhp, dp, nfsdl_list);
3496 } else
3497 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
3498 }
3499 NFSFREECRED(cred);
3500 }
3501
3502 /*
3503 * Return any delegation for this vp.
3504 */
3505 void
3506 nfscl_delegreturnvp(vnode_t vp, NFSPROC_T *p)
3507 {
3508 struct nfsclclient *clp;
3509 struct nfscldeleg *dp;
3510 struct ucred *cred;
3511 struct nfsnode *np;
3512 struct nfsmount *nmp;
3513
3514 nmp = VFSTONFS(vp->v_mount);
3515 NFSLOCKMNT(nmp);
3516 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
3517 NFSUNLOCKMNT(nmp);
3518 return;
3519 }
3520 NFSUNLOCKMNT(nmp);
3521 np = VTONFS(vp);
3522 cred = newnfs_getcred();
3523 dp = NULL;
3524 NFSLOCKCLSTATE();
3525 clp = nmp->nm_clp;
3526 if (clp != NULL)
3527 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
3528 np->n_fhp->nfh_len);
3529 if (dp != NULL) {
3530 nfscl_cleandeleg(dp);
3531 nfscl_freedeleg(&clp->nfsc_deleg, dp, false);
3532 NFSUNLOCKCLSTATE();
3533 newnfs_copycred(&dp->nfsdl_cred, cred);
3534 nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3535 free(dp, M_NFSCLDELEG);
3536 } else
3537 NFSUNLOCKCLSTATE();
3538 NFSFREECRED(cred);
3539 }
3540
3541 /*
3542 * Do a callback RPC.
3543 */
3544 void
3545 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3546 {
3547 int clist, gotseq_ok, i, j, k, op, rcalls;
3548 u_int32_t *tl;
3549 struct nfsclclient *clp;
3550 struct nfscldeleg *dp = NULL;
3551 int numops, taglen = -1, error = 0, trunc __unused;
3552 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
3553 u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3554 vnode_t vp = NULL;
3555 struct nfsnode *np;
3556 struct vattr va;
3557 struct nfsfh *nfhp;
3558 mount_t mp;
3559 nfsattrbit_t attrbits, rattrbits;
3560 nfsv4stateid_t stateid;
3561 uint32_t seqid, slotid = 0, highslot, cachethis __unused;
3562 uint8_t sessionid[NFSX_V4SESSIONID];
3563 struct mbuf *rep;
3564 struct nfscllayout *lyp;
3565 uint64_t filesid[2], len, off;
3566 int changed, gotone, laytype, recalltype;
3567 uint32_t iomode;
3568 struct nfsclrecalllayout *recallp = NULL;
3569 struct nfsclsession *tsep;
3570
3571 gotseq_ok = 0;
3572 nfsrvd_rephead(nd);
3573 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3574 taglen = fxdr_unsigned(int, *tl);
3575 if (taglen < 0 || taglen > NFSV4_OPAQUELIMIT) {
3576 error = EBADRPC;
3577 taglen = -1;
3578 goto nfsmout;
3579 }
3580 if (taglen <= NFSV4_SMALLSTR)
3581 tagstr = tag;
3582 else
3583 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3584 error = nfsrv_mtostr(nd, tagstr, taglen);
3585 if (error) {
3586 if (taglen > NFSV4_SMALLSTR)
3587 free(tagstr, M_TEMP);
3588 taglen = -1;
3589 goto nfsmout;
3590 }
3591 (void) nfsm_strtom(nd, tag, taglen);
3592 if (taglen > NFSV4_SMALLSTR) {
3593 free(tagstr, M_TEMP);
3594 }
3595 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3596 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3597 minorvers = fxdr_unsigned(u_int32_t, *tl++);
3598 if (minorvers != NFSV4_MINORVERSION &&
3599 minorvers != NFSV41_MINORVERSION &&
3600 minorvers != NFSV42_MINORVERSION)
3601 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3602 cbident = fxdr_unsigned(u_int32_t, *tl++);
3603 if (nd->nd_repstat)
3604 numops = 0;
3605 else
3606 numops = fxdr_unsigned(int, *tl);
3607 /*
3608 * Loop around doing the sub ops.
3609 */
3610 for (i = 0; i < numops; i++) {
3611 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3612 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3613 *repp++ = *tl;
3614 op = fxdr_unsigned(int, *tl);
3615 nd->nd_procnum = op;
3616 if (i == 0 && op != NFSV4OP_CBSEQUENCE && minorvers !=
3617 NFSV4_MINORVERSION) {
3618 nd->nd_repstat = NFSERR_OPNOTINSESS;
3619 *repp = nfscl_errmap(nd, minorvers);
3620 retops++;
3621 break;
3622 }
3623 if (op < NFSV4OP_CBGETATTR ||
3624 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
3625 (op > NFSV4OP_CBNOTIFYDEVID &&
3626 minorvers == NFSV41_MINORVERSION) ||
3627 (op > NFSV4OP_CBOFFLOAD &&
3628 minorvers == NFSV42_MINORVERSION)) {
3629 nd->nd_repstat = NFSERR_OPILLEGAL;
3630 *repp = nfscl_errmap(nd, minorvers);
3631 retops++;
3632 break;
3633 }
3634 if (op < NFSV42_CBNOPS)
3635 nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
3636 switch (op) {
3637 case NFSV4OP_CBGETATTR:
3638 NFSCL_DEBUG(4, "cbgetattr\n");
3639 mp = NULL;
3640 vp = NULL;
3641 error = nfsm_getfh(nd, &nfhp);
3642 if (!error)
3643 error = nfsrv_getattrbits(nd, &attrbits,
3644 NULL, NULL);
3645 if (!error) {
3646 mp = nfscl_getmnt(minorvers, sessionid, cbident,
3647 &clp);
3648 if (mp == NULL)
3649 error = NFSERR_SERVERFAULT;
3650 }
3651 if (!error) {
3652 error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3653 nfhp->nfh_len, p, &np);
3654 if (!error)
3655 vp = NFSTOV(np);
3656 }
3657 if (!error) {
3658 NFSZERO_ATTRBIT(&rattrbits);
3659 NFSLOCKCLSTATE();
3660 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3661 nfhp->nfh_len);
3662 if (dp != NULL) {
3663 if (NFSISSET_ATTRBIT(&attrbits,
3664 NFSATTRBIT_SIZE)) {
3665 if (vp != NULL)
3666 va.va_size = np->n_size;
3667 else
3668 va.va_size =
3669 dp->nfsdl_size;
3670 NFSSETBIT_ATTRBIT(&rattrbits,
3671 NFSATTRBIT_SIZE);
3672 }
3673 if (NFSISSET_ATTRBIT(&attrbits,
3674 NFSATTRBIT_CHANGE)) {
3675 va.va_filerev =
3676 dp->nfsdl_change;
3677 if (vp == NULL ||
3678 (np->n_flag & NDELEGMOD))
3679 va.va_filerev++;
3680 NFSSETBIT_ATTRBIT(&rattrbits,
3681 NFSATTRBIT_CHANGE);
3682 }
3683 } else
3684 error = NFSERR_SERVERFAULT;
3685 NFSUNLOCKCLSTATE();
3686 }
3687 if (vp != NULL)
3688 vrele(vp);
3689 if (mp != NULL)
3690 vfs_unbusy(mp);
3691 if (nfhp != NULL)
3692 free(nfhp, M_NFSFH);
3693 if (!error)
3694 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3695 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
3696 (uint64_t)0, NULL);
3697 break;
3698 case NFSV4OP_CBRECALL:
3699 NFSCL_DEBUG(4, "cbrecall\n");
3700 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3701 NFSX_UNSIGNED);
3702 stateid.seqid = *tl++;
3703 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3704 NFSX_STATEIDOTHER);
3705 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3706 trunc = fxdr_unsigned(int, *tl);
3707 error = nfsm_getfh(nd, &nfhp);
3708 if (!error) {
3709 NFSLOCKCLSTATE();
3710 if (minorvers == NFSV4_MINORVERSION)
3711 clp = nfscl_getclnt(cbident);
3712 else
3713 clp = nfscl_getclntsess(sessionid);
3714 if (clp != NULL) {
3715 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3716 nfhp->nfh_len);
3717 if (dp != NULL && (dp->nfsdl_flags &
3718 NFSCLDL_DELEGRET) == 0) {
3719 dp->nfsdl_flags |=
3720 NFSCLDL_RECALL;
3721 wakeup((caddr_t)clp);
3722 }
3723 } else {
3724 error = NFSERR_SERVERFAULT;
3725 }
3726 NFSUNLOCKCLSTATE();
3727 }
3728 if (nfhp != NULL)
3729 free(nfhp, M_NFSFH);
3730 break;
3731 case NFSV4OP_CBLAYOUTRECALL:
3732 NFSCL_DEBUG(4, "cblayrec\n");
3733 nfhp = NULL;
3734 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
3735 laytype = fxdr_unsigned(int, *tl++);
3736 iomode = fxdr_unsigned(uint32_t, *tl++);
3737 if (newnfs_true == *tl++)
3738 changed = 1;
3739 else
3740 changed = 0;
3741 recalltype = fxdr_unsigned(int, *tl);
3742 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n",
3743 laytype, iomode, changed, recalltype);
3744 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
3745 M_WAITOK);
3746 if (laytype != NFSLAYOUT_NFSV4_1_FILES &&
3747 laytype != NFSLAYOUT_FLEXFILE)
3748 error = NFSERR_NOMATCHLAYOUT;
3749 else if (recalltype == NFSLAYOUTRETURN_FILE) {
3750 error = nfsm_getfh(nd, &nfhp);
3751 NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
3752 if (error != 0)
3753 goto nfsmout;
3754 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
3755 NFSX_STATEID);
3756 off = fxdr_hyper(tl); tl += 2;
3757 len = fxdr_hyper(tl); tl += 2;
3758 stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
3759 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
3760 if (minorvers == NFSV4_MINORVERSION)
3761 error = NFSERR_NOTSUPP;
3762 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n",
3763 (uintmax_t)off, (uintmax_t)len,
3764 stateid.seqid, error);
3765 if (error == 0) {
3766 NFSLOCKCLSTATE();
3767 clp = nfscl_getclntsess(sessionid);
3768 NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
3769 if (clp != NULL) {
3770 lyp = nfscl_findlayout(clp,
3771 nfhp->nfh_fh,
3772 nfhp->nfh_len);
3773 NFSCL_DEBUG(4, "cblyp=%p\n",
3774 lyp);
3775 if (lyp != NULL &&
3776 (lyp->nfsly_flags &
3777 (NFSLY_FILES |
3778 NFSLY_FLEXFILE)) != 0 &&
3779 !NFSBCMP(stateid.other,
3780 lyp->nfsly_stateid.other,
3781 NFSX_STATEIDOTHER)) {
3782 error =
3783 nfscl_layoutrecall(
3784 recalltype,
3785 lyp, iomode, off,
3786 len, stateid.seqid,
3787 0, 0, NULL,
3788 recallp);
3789 if (error == 0 &&
3790 stateid.seqid >
3791 lyp->nfsly_stateid.seqid)
3792 lyp->nfsly_stateid.seqid =
3793 stateid.seqid;
3794 recallp = NULL;
3795 wakeup(clp);
3796 NFSCL_DEBUG(4,
3797 "aft layrcal=%d "
3798 "layseqid=%d\n",
3799 error,
3800 lyp->nfsly_stateid.seqid);
3801 } else
3802 error =
3803 NFSERR_NOMATCHLAYOUT;
3804 } else
3805 error = NFSERR_NOMATCHLAYOUT;
3806 NFSUNLOCKCLSTATE();
3807 }
3808 free(nfhp, M_NFSFH);
3809 } else if (recalltype == NFSLAYOUTRETURN_FSID) {
3810 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
3811 filesid[0] = fxdr_hyper(tl); tl += 2;
3812 filesid[1] = fxdr_hyper(tl); tl += 2;
3813 gotone = 0;
3814 NFSLOCKCLSTATE();
3815 clp = nfscl_getclntsess(sessionid);
3816 if (clp != NULL) {
3817 TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3818 nfsly_list) {
3819 if (lyp->nfsly_filesid[0] ==
3820 filesid[0] &&
3821 lyp->nfsly_filesid[1] ==
3822 filesid[1]) {
3823 error =
3824 nfscl_layoutrecall(
3825 recalltype,
3826 lyp, iomode, 0,
3827 UINT64_MAX,
3828 lyp->nfsly_stateid.seqid,
3829 0, 0, NULL,
3830 recallp);
3831 recallp = NULL;
3832 gotone = 1;
3833 }
3834 }
3835 if (gotone != 0)
3836 wakeup(clp);
3837 else
3838 error = NFSERR_NOMATCHLAYOUT;
3839 } else
3840 error = NFSERR_NOMATCHLAYOUT;
3841 NFSUNLOCKCLSTATE();
3842 } else if (recalltype == NFSLAYOUTRETURN_ALL) {
3843 gotone = 0;
3844 NFSLOCKCLSTATE();
3845 clp = nfscl_getclntsess(sessionid);
3846 if (clp != NULL) {
3847 TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3848 nfsly_list) {
3849 error = nfscl_layoutrecall(
3850 recalltype, lyp, iomode, 0,
3851 UINT64_MAX,
3852 lyp->nfsly_stateid.seqid,
3853 0, 0, NULL, recallp);
3854 recallp = NULL;
3855 gotone = 1;
3856 }
3857 if (gotone != 0)
3858 wakeup(clp);
3859 else
3860 error = NFSERR_NOMATCHLAYOUT;
3861 } else
3862 error = NFSERR_NOMATCHLAYOUT;
3863 NFSUNLOCKCLSTATE();
3864 } else
3865 error = NFSERR_NOMATCHLAYOUT;
3866 if (recallp != NULL) {
3867 free(recallp, M_NFSLAYRECALL);
3868 recallp = NULL;
3869 }
3870 break;
3871 case NFSV4OP_CBSEQUENCE:
3872 if (i != 0) {
3873 error = NFSERR_SEQUENCEPOS;
3874 break;
3875 }
3876 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3877 5 * NFSX_UNSIGNED);
3878 bcopy(tl, sessionid, NFSX_V4SESSIONID);
3879 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3880 seqid = fxdr_unsigned(uint32_t, *tl++);
3881 slotid = fxdr_unsigned(uint32_t, *tl++);
3882 highslot = fxdr_unsigned(uint32_t, *tl++);
3883 cachethis = *tl++;
3884 /* Throw away the referring call stuff. */
3885 clist = fxdr_unsigned(int, *tl);
3886 for (j = 0; j < clist; j++) {
3887 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3888 NFSX_UNSIGNED);
3889 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3890 rcalls = fxdr_unsigned(int, *tl);
3891 for (k = 0; k < rcalls; k++) {
3892 NFSM_DISSECT(tl, uint32_t *,
3893 2 * NFSX_UNSIGNED);
3894 }
3895 }
3896 NFSLOCKCLSTATE();
3897 clp = nfscl_getclntsess(sessionid);
3898 if (clp == NULL)
3899 error = NFSERR_SERVERFAULT;
3900 if (error == 0) {
3901 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3902 error = nfsv4_seqsession(seqid, slotid,
3903 highslot, tsep->nfsess_cbslots, &rep,
3904 tsep->nfsess_backslots);
3905 }
3906 NFSUNLOCKCLSTATE();
3907 if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
3908 gotseq_ok = 1;
3909 if (rep != NULL) {
3910 /*
3911 * Handle a reply for a retried
3912 * callback. The reply will be
3913 * re-inserted in the session cache
3914 * by the nfsv4_seqsess_cacherep() call
3915 * after out:
3916 */
3917 KASSERT(error == NFSERR_REPLYFROMCACHE,
3918 ("cbsequence: non-NULL rep"));
3919 NFSCL_DEBUG(4, "Got cbretry\n");
3920 m_freem(nd->nd_mreq);
3921 nd->nd_mreq = rep;
3922 rep = NULL;
3923 goto out;
3924 }
3925 NFSM_BUILD(tl, uint32_t *,
3926 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
3927 bcopy(sessionid, tl, NFSX_V4SESSIONID);
3928 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3929 *tl++ = txdr_unsigned(seqid);
3930 *tl++ = txdr_unsigned(slotid);
3931 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
3932 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
3933 }
3934 break;
3935 default:
3936 if (i == 0 && minorvers != NFSV4_MINORVERSION)
3937 error = NFSERR_OPNOTINSESS;
3938 else {
3939 NFSCL_DEBUG(1, "unsupp callback %d\n", op);
3940 error = NFSERR_NOTSUPP;
3941 }
3942 break;
3943 }
3944 if (error) {
3945 if (error == EBADRPC || error == NFSERR_BADXDR) {
3946 nd->nd_repstat = NFSERR_BADXDR;
3947 } else {
3948 nd->nd_repstat = error;
3949 }
3950 error = 0;
3951 }
3952 retops++;
3953 if (nd->nd_repstat) {
3954 *repp = nfscl_errmap(nd, minorvers);
3955 break;
3956 } else
3957 *repp = 0; /* NFS4_OK */
3958 }
3959 nfsmout:
3960 if (recallp != NULL)
3961 free(recallp, M_NFSLAYRECALL);
3962 if (error) {
3963 if (error == EBADRPC || error == NFSERR_BADXDR)
3964 nd->nd_repstat = NFSERR_BADXDR;
3965 else
3966 printf("nfsv4 comperr1=%d\n", error);
3967 }
3968 if (taglen == -1) {
3969 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3970 *tl++ = 0;
3971 *tl = 0;
3972 } else {
3973 *retopsp = txdr_unsigned(retops);
3974 }
3975 *nd->nd_errp = nfscl_errmap(nd, minorvers);
3976 out:
3977 if (gotseq_ok != 0) {
3978 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
3979 NFSLOCKCLSTATE();
3980 clp = nfscl_getclntsess(sessionid);
3981 if (clp != NULL) {
3982 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3983 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
3984 NFSERR_OK, &rep);
3985 NFSUNLOCKCLSTATE();
3986 } else {
3987 NFSUNLOCKCLSTATE();
3988 m_freem(rep);
3989 }
3990 }
3991 }
3992
3993 /*
3994 * Generate the next cbident value. Basically just increment a static value
3995 * and then check that it isn't already in the list, if it has wrapped around.
3996 */
3997 static u_int32_t
3998 nfscl_nextcbident(void)
3999 {
4000 struct nfsclclient *clp;
4001 int matched;
4002 static u_int32_t nextcbident = 0;
4003 static int haswrapped = 0;
4004
4005 nextcbident++;
4006 if (nextcbident == 0)
4007 haswrapped = 1;
4008 if (haswrapped) {
4009 /*
4010 * Search the clientid list for one already using this cbident.
4011 */
4012 do {
4013 matched = 0;
4014 NFSLOCKCLSTATE();
4015 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4016 if (clp->nfsc_cbident == nextcbident) {
4017 matched = 1;
4018 break;
4019 }
4020 }
4021 NFSUNLOCKCLSTATE();
4022 if (matched == 1)
4023 nextcbident++;
4024 } while (matched);
4025 }
4026 return (nextcbident);
4027 }
4028
4029 /*
4030 * Get the mount point related to a given cbident or session and busy it.
4031 */
4032 static mount_t
4033 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
4034 struct nfsclclient **clpp)
4035 {
4036 struct nfsclclient *clp;
4037 mount_t mp;
4038 int error;
4039 struct nfsclsession *tsep;
4040
4041 *clpp = NULL;
4042 NFSLOCKCLSTATE();
4043 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4044 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
4045 if (minorvers == NFSV4_MINORVERSION) {
4046 if (clp->nfsc_cbident == cbident)
4047 break;
4048 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
4049 NFSX_V4SESSIONID))
4050 break;
4051 }
4052 if (clp == NULL) {
4053 NFSUNLOCKCLSTATE();
4054 return (NULL);
4055 }
4056 mp = clp->nfsc_nmp->nm_mountp;
4057 vfs_ref(mp);
4058 NFSUNLOCKCLSTATE();
4059 error = vfs_busy(mp, 0);
4060 vfs_rel(mp);
4061 if (error != 0)
4062 return (NULL);
4063 *clpp = clp;
4064 return (mp);
4065 }
4066
4067 /*
4068 * Get the clientid pointer related to a given cbident.
4069 */
4070 static struct nfsclclient *
4071 nfscl_getclnt(u_int32_t cbident)
4072 {
4073 struct nfsclclient *clp;
4074
4075 LIST_FOREACH(clp, &nfsclhead, nfsc_list)
4076 if (clp->nfsc_cbident == cbident)
4077 break;
4078 return (clp);
4079 }
4080
4081 /*
4082 * Get the clientid pointer related to a given sessionid.
4083 */
4084 static struct nfsclclient *
4085 nfscl_getclntsess(uint8_t *sessionid)
4086 {
4087 struct nfsclclient *clp;
4088 struct nfsclsession *tsep;
4089
4090 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4091 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
4092 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
4093 NFSX_V4SESSIONID))
4094 break;
4095 }
4096 return (clp);
4097 }
4098
4099 /*
4100 * Search for a lock conflict locally on the client. A conflict occurs if
4101 * - not same owner and overlapping byte range and at least one of them is
4102 * a write lock or this is an unlock.
4103 */
4104 static int
4105 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
4106 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
4107 struct nfscllock **lopp)
4108 {
4109 struct nfsclopen *op;
4110 int ret;
4111
4112 if (dp != NULL) {
4113 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
4114 if (ret)
4115 return (ret);
4116 }
4117 LIST_FOREACH(op, NFSCLOPENHASH(clp, fhp, fhlen), nfso_hash) {
4118 if (op->nfso_fhlen == fhlen &&
4119 !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
4120 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
4121 own, lopp);
4122 if (ret)
4123 return (ret);
4124 }
4125 }
4126 return (0);
4127 }
4128
4129 static int
4130 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
4131 u_int8_t *own, struct nfscllock **lopp)
4132 {
4133 struct nfscllockowner *lp;
4134 struct nfscllock *lop;
4135
4136 LIST_FOREACH(lp, lhp, nfsl_list) {
4137 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
4138 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
4139 if (lop->nfslo_first >= nlop->nfslo_end)
4140 break;
4141 if (lop->nfslo_end <= nlop->nfslo_first)
4142 continue;
4143 if (lop->nfslo_type == F_WRLCK ||
4144 nlop->nfslo_type == F_WRLCK ||
4145 nlop->nfslo_type == F_UNLCK) {
4146 if (lopp != NULL)
4147 *lopp = lop;
4148 return (NFSERR_DENIED);
4149 }
4150 }
4151 }
4152 }
4153 return (0);
4154 }
4155
4156 /*
4157 * Check for a local conflicting lock.
4158 */
4159 int
4160 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
4161 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
4162 {
4163 struct nfscllock *lop, nlck;
4164 struct nfscldeleg *dp;
4165 struct nfsnode *np;
4166 u_int8_t own[NFSV4CL_LOCKNAMELEN];
4167 int error;
4168
4169 nlck.nfslo_type = fl->l_type;
4170 nlck.nfslo_first = off;
4171 if (len == NFS64BITSSET) {
4172 nlck.nfslo_end = NFS64BITSSET;
4173 } else {
4174 nlck.nfslo_end = off + len;
4175 if (nlck.nfslo_end <= nlck.nfslo_first)
4176 return (NFSERR_INVAL);
4177 }
4178 np = VTONFS(vp);
4179 nfscl_filllockowner(id, own, flags);
4180 NFSLOCKCLSTATE();
4181 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4182 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
4183 &nlck, own, dp, &lop);
4184 if (error != 0) {
4185 fl->l_whence = SEEK_SET;
4186 fl->l_start = lop->nfslo_first;
4187 if (lop->nfslo_end == NFS64BITSSET)
4188 fl->l_len = 0;
4189 else
4190 fl->l_len = lop->nfslo_end - lop->nfslo_first;
4191 fl->l_pid = (pid_t)0;
4192 fl->l_type = lop->nfslo_type;
4193 error = -1; /* no RPC required */
4194 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
4195 fl->l_type == F_RDLCK)) {
4196 /*
4197 * The delegation ensures that there isn't a conflicting
4198 * lock on the server, so return -1 to indicate an RPC
4199 * isn't required.
4200 */
4201 fl->l_type = F_UNLCK;
4202 error = -1;
4203 }
4204 NFSUNLOCKCLSTATE();
4205 return (error);
4206 }
4207
4208 /*
4209 * Handle Recall of a delegation.
4210 * The clp must be exclusive locked when this is called.
4211 */
4212 static int
4213 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
4214 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
4215 int called_from_renewthread, vnode_t *vpp)
4216 {
4217 struct nfsclowner *owp, *lowp, *nowp;
4218 struct nfsclopen *op, *lop;
4219 struct nfscllockowner *lp;
4220 struct nfscllock *lckp;
4221 struct nfsnode *np;
4222 int error = 0, ret;
4223
4224 if (vp == NULL) {
4225 KASSERT(vpp != NULL, ("nfscl_recalldeleg: vpp NULL"));
4226 *vpp = NULL;
4227 /*
4228 * First, get a vnode for the file. This is needed to do RPCs.
4229 */
4230 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
4231 dp->nfsdl_fhlen, p, &np);
4232 if (ret) {
4233 /*
4234 * File isn't open, so nothing to move over to the
4235 * server.
4236 */
4237 return (0);
4238 }
4239 vp = NFSTOV(np);
4240 *vpp = vp;
4241 } else {
4242 np = VTONFS(vp);
4243 }
4244 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
4245
4246 /*
4247 * Ok, if it's a write delegation, flush data to the server, so
4248 * that close/open consistency is retained.
4249 */
4250 ret = 0;
4251 NFSLOCKNODE(np);
4252 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
4253 np->n_flag |= NDELEGRECALL;
4254 NFSUNLOCKNODE(np);
4255 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
4256 NFSLOCKNODE(np);
4257 np->n_flag &= ~NDELEGRECALL;
4258 }
4259 NFSINVALATTRCACHE(np);
4260 NFSUNLOCKNODE(np);
4261 if (ret == EIO && called_from_renewthread != 0) {
4262 /*
4263 * If the flush failed with EIO for the renew thread,
4264 * return now, so that the dirty buffer will be flushed
4265 * later.
4266 */
4267 return (ret);
4268 }
4269
4270 /*
4271 * Now, for each openowner with opens issued locally, move them
4272 * over to state against the server.
4273 */
4274 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
4275 lop = LIST_FIRST(&lowp->nfsow_open);
4276 if (lop != NULL) {
4277 if (LIST_NEXT(lop, nfso_list) != NULL)
4278 panic("nfsdlg mult opens");
4279 /*
4280 * Look for the same openowner against the server.
4281 */
4282 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
4283 if (!NFSBCMP(lowp->nfsow_owner,
4284 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
4285 newnfs_copycred(&dp->nfsdl_cred, cred);
4286 ret = nfscl_moveopen(vp, clp, nmp, lop,
4287 owp, dp, cred, p);
4288 if (ret == NFSERR_STALECLIENTID ||
4289 ret == NFSERR_STALEDONTRECOVER ||
4290 ret == NFSERR_BADSESSION)
4291 return (ret);
4292 if (ret) {
4293 nfscl_freeopen(lop, 1, true);
4294 if (!error)
4295 error = ret;
4296 }
4297 break;
4298 }
4299 }
4300
4301 /*
4302 * If no openowner found, create one and get an open
4303 * for it.
4304 */
4305 if (owp == NULL) {
4306 nowp = malloc(
4307 sizeof (struct nfsclowner), M_NFSCLOWNER,
4308 M_WAITOK);
4309 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
4310 NULL, lowp->nfsow_owner, dp->nfsdl_fh,
4311 dp->nfsdl_fhlen, NULL, NULL);
4312 newnfs_copycred(&dp->nfsdl_cred, cred);
4313 ret = nfscl_moveopen(vp, clp, nmp, lop,
4314 owp, dp, cred, p);
4315 if (ret) {
4316 nfscl_freeopenowner(owp, 0);
4317 if (ret == NFSERR_STALECLIENTID ||
4318 ret == NFSERR_STALEDONTRECOVER ||
4319 ret == NFSERR_BADSESSION)
4320 return (ret);
4321 if (ret) {
4322 nfscl_freeopen(lop, 1, true);
4323 if (!error)
4324 error = ret;
4325 }
4326 }
4327 }
4328 }
4329 }
4330
4331 /*
4332 * Now, get byte range locks for any locks done locally.
4333 */
4334 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4335 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
4336 newnfs_copycred(&dp->nfsdl_cred, cred);
4337 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
4338 if (ret == NFSERR_STALESTATEID ||
4339 ret == NFSERR_STALEDONTRECOVER ||
4340 ret == NFSERR_STALECLIENTID ||
4341 ret == NFSERR_BADSESSION)
4342 return (ret);
4343 if (ret && !error)
4344 error = ret;
4345 }
4346 }
4347 return (error);
4348 }
4349
4350 /*
4351 * Move a locally issued open over to an owner on the state list.
4352 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
4353 * returns with it unlocked.
4354 */
4355 static int
4356 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4357 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
4358 struct ucred *cred, NFSPROC_T *p)
4359 {
4360 struct nfsclopen *op, *nop;
4361 struct nfscldeleg *ndp;
4362 struct nfsnode *np;
4363 int error = 0, newone;
4364
4365 /*
4366 * First, look for an appropriate open, If found, just increment the
4367 * opencnt in it.
4368 */
4369 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
4370 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
4371 op->nfso_fhlen == lop->nfso_fhlen &&
4372 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
4373 op->nfso_opencnt += lop->nfso_opencnt;
4374 nfscl_freeopen(lop, 1, true);
4375 return (0);
4376 }
4377 }
4378
4379 /* No appropriate open, so we have to do one against the server. */
4380 np = VTONFS(vp);
4381 nop = malloc(sizeof (struct nfsclopen) +
4382 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
4383 nop->nfso_hash.le_prev = NULL;
4384 newone = 0;
4385 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
4386 lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
4387 ndp = dp;
4388 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
4389 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
4390 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
4391 if (error) {
4392 if (newone)
4393 nfscl_freeopen(op, 0, true);
4394 } else {
4395 op->nfso_mode |= lop->nfso_mode;
4396 op->nfso_opencnt += lop->nfso_opencnt;
4397 nfscl_freeopen(lop, 1, true);
4398 }
4399 if (nop != NULL)
4400 free(nop, M_NFSCLOPEN);
4401 if (ndp != NULL) {
4402 /*
4403 * What should I do with the returned delegation, since the
4404 * delegation is being recalled? For now, just printf and
4405 * through it away.
4406 */
4407 printf("Moveopen returned deleg\n");
4408 free(ndp, M_NFSCLDELEG);
4409 }
4410 return (error);
4411 }
4412
4413 /*
4414 * Recall all delegations on this client.
4415 */
4416 static void
4417 nfscl_totalrecall(struct nfsclclient *clp)
4418 {
4419 struct nfscldeleg *dp;
4420
4421 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
4422 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
4423 dp->nfsdl_flags |= NFSCLDL_RECALL;
4424 }
4425 }
4426
4427 /*
4428 * Relock byte ranges. Called for delegation recall and state expiry.
4429 */
4430 static int
4431 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4432 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
4433 NFSPROC_T *p)
4434 {
4435 struct nfscllockowner *nlp;
4436 struct nfsfh *nfhp;
4437 struct nfsnode *np;
4438 u_int64_t off, len;
4439 int error, newone, donelocally;
4440
4441 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
4442 np = VTONFS(vp);
4443 NFSLOCKNODE(np);
4444 np->n_flag |= NMIGHTBELOCKED;
4445 NFSUNLOCKNODE(np);
4446 }
4447
4448 off = lop->nfslo_first;
4449 len = lop->nfslo_end - lop->nfslo_first;
4450 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
4451 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
4452 lp->nfsl_openowner, &nlp, &newone, &donelocally);
4453 if (error || donelocally)
4454 return (error);
4455 nfhp = VTONFS(vp)->n_fhp;
4456 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
4457 nfhp->nfh_len, nlp, newone, 0, off,
4458 len, lop->nfslo_type, cred, p);
4459 if (error)
4460 nfscl_freelockowner(nlp, 0);
4461 return (error);
4462 }
4463
4464 /*
4465 * Called to re-open a file. Basically get a vnode for the file handle
4466 * and then call nfsrpc_openrpc() to do the rest.
4467 */
4468 static int
4469 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
4470 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
4471 struct ucred *cred, NFSPROC_T *p)
4472 {
4473 struct nfsnode *np;
4474 vnode_t vp;
4475 int error;
4476
4477 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
4478 if (error)
4479 return (error);
4480 vp = NFSTOV(np);
4481 if (np->n_v4 != NULL) {
4482 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4483 np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
4484 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
4485 cred, p);
4486 } else {
4487 error = EINVAL;
4488 }
4489 vrele(vp);
4490 return (error);
4491 }
4492
4493 /*
4494 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
4495 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
4496 * fail.
4497 */
4498 static int
4499 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4500 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
4501 u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
4502 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
4503 {
4504 int error;
4505
4506 do {
4507 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
4508 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
4509 0, 0);
4510 if (error == NFSERR_DELAY)
4511 (void) nfs_catnap(PZERO, error, "nfstryop");
4512 } while (error == NFSERR_DELAY);
4513 if (error == EAUTH || error == EACCES) {
4514 /* Try again using system credentials */
4515 newnfs_setroot(cred);
4516 do {
4517 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
4518 newfhlen, mode, op, name, namelen, ndpp, reclaim,
4519 delegtype, cred, p, 1, 0);
4520 if (error == NFSERR_DELAY)
4521 (void) nfs_catnap(PZERO, error, "nfstryop");
4522 } while (error == NFSERR_DELAY);
4523 }
4524 return (error);
4525 }
4526
4527 /*
4528 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
4529 * NFSERR_DELAY. Also, retry with system credentials, if the provided
4530 * cred don't work.
4531 */
4532 static int
4533 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
4534 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
4535 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
4536 {
4537 struct nfsrv_descript nfsd, *nd = &nfsd;
4538 int error;
4539
4540 do {
4541 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
4542 reclaim, off, len, type, cred, p, 0);
4543 if (!error && nd->nd_repstat == NFSERR_DELAY)
4544 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4545 "nfstrylck");
4546 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4547 if (!error)
4548 error = nd->nd_repstat;
4549 if (error == EAUTH || error == EACCES) {
4550 /* Try again using root credentials */
4551 newnfs_setroot(cred);
4552 do {
4553 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
4554 newone, reclaim, off, len, type, cred, p, 1);
4555 if (!error && nd->nd_repstat == NFSERR_DELAY)
4556 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4557 "nfstrylck");
4558 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4559 if (!error)
4560 error = nd->nd_repstat;
4561 }
4562 return (error);
4563 }
4564
4565 /*
4566 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
4567 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4568 * credentials fail.
4569 */
4570 int
4571 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
4572 struct nfsmount *nmp, NFSPROC_T *p)
4573 {
4574 int error;
4575
4576 do {
4577 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
4578 if (error == NFSERR_DELAY)
4579 (void) nfs_catnap(PZERO, error, "nfstrydp");
4580 } while (error == NFSERR_DELAY);
4581 if (error == EAUTH || error == EACCES) {
4582 /* Try again using system credentials */
4583 newnfs_setroot(cred);
4584 do {
4585 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
4586 if (error == NFSERR_DELAY)
4587 (void) nfs_catnap(PZERO, error, "nfstrydp");
4588 } while (error == NFSERR_DELAY);
4589 }
4590 return (error);
4591 }
4592
4593 /*
4594 * Try a close against the server. Just call nfsrpc_closerpc(),
4595 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4596 * credentials fail.
4597 */
4598 int
4599 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
4600 struct nfsmount *nmp, NFSPROC_T *p, bool loop_on_delayed)
4601 {
4602 struct nfsrv_descript nfsd, *nd = &nfsd;
4603 int error;
4604
4605 do {
4606 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
4607 if (loop_on_delayed && error == NFSERR_DELAY)
4608 (void) nfs_catnap(PZERO, error, "nfstrycl");
4609 } while (loop_on_delayed && error == NFSERR_DELAY);
4610 if (error == EAUTH || error == EACCES) {
4611 /* Try again using system credentials */
4612 newnfs_setroot(cred);
4613 do {
4614 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
4615 if (loop_on_delayed && error == NFSERR_DELAY)
4616 (void) nfs_catnap(PZERO, error, "nfstrycl");
4617 } while (loop_on_delayed && error == NFSERR_DELAY);
4618 }
4619 return (error);
4620 }
4621
4622 /*
4623 * Decide if a delegation on a file permits close without flushing writes
4624 * to the server. This might be a big performance win in some environments.
4625 * (Not useful until the client does caching on local stable storage.)
4626 */
4627 int
4628 nfscl_mustflush(vnode_t vp)
4629 {
4630 struct nfsclclient *clp;
4631 struct nfscldeleg *dp;
4632 struct nfsnode *np;
4633 struct nfsmount *nmp;
4634
4635 np = VTONFS(vp);
4636 nmp = VFSTONFS(vp->v_mount);
4637 if (!NFSHASNFSV4(nmp))
4638 return (1);
4639 NFSLOCKMNT(nmp);
4640 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4641 NFSUNLOCKMNT(nmp);
4642 return (1);
4643 }
4644 NFSUNLOCKMNT(nmp);
4645 NFSLOCKCLSTATE();
4646 clp = nfscl_findcl(nmp);
4647 if (clp == NULL) {
4648 NFSUNLOCKCLSTATE();
4649 return (1);
4650 }
4651 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4652 if (dp != NULL && (dp->nfsdl_flags &
4653 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
4654 NFSCLDL_WRITE &&
4655 (dp->nfsdl_sizelimit >= np->n_size ||
4656 !NFSHASSTRICT3530(nmp))) {
4657 NFSUNLOCKCLSTATE();
4658 return (0);
4659 }
4660 NFSUNLOCKCLSTATE();
4661 return (1);
4662 }
4663
4664 /*
4665 * See if a (write) delegation exists for this file.
4666 */
4667 int
4668 nfscl_nodeleg(vnode_t vp, int writedeleg)
4669 {
4670 struct nfsclclient *clp;
4671 struct nfscldeleg *dp;
4672 struct nfsnode *np;
4673 struct nfsmount *nmp;
4674
4675 np = VTONFS(vp);
4676 nmp = VFSTONFS(vp->v_mount);
4677 if (!NFSHASNFSV4(nmp))
4678 return (1);
4679 NFSLOCKMNT(nmp);
4680 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4681 NFSUNLOCKMNT(nmp);
4682 return (1);
4683 }
4684 NFSUNLOCKMNT(nmp);
4685 NFSLOCKCLSTATE();
4686 clp = nfscl_findcl(nmp);
4687 if (clp == NULL) {
4688 NFSUNLOCKCLSTATE();
4689 return (1);
4690 }
4691 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4692 if (dp != NULL &&
4693 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
4694 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
4695 NFSCLDL_WRITE)) {
4696 NFSUNLOCKCLSTATE();
4697 return (0);
4698 }
4699 NFSUNLOCKCLSTATE();
4700 return (1);
4701 }
4702
4703 /*
4704 * Look for an associated delegation that should be DelegReturned.
4705 */
4706 int
4707 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
4708 {
4709 struct nfsclclient *clp;
4710 struct nfscldeleg *dp;
4711 struct nfsclowner *owp;
4712 struct nfscllockowner *lp;
4713 struct nfsmount *nmp;
4714 struct mount *mp;
4715 struct ucred *cred;
4716 struct nfsnode *np;
4717 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4718
4719 nmp = VFSTONFS(vp->v_mount);
4720 if (NFSHASPNFS(nmp))
4721 return (retcnt);
4722 NFSLOCKMNT(nmp);
4723 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4724 NFSUNLOCKMNT(nmp);
4725 return (retcnt);
4726 }
4727 NFSUNLOCKMNT(nmp);
4728 np = VTONFS(vp);
4729 mp = nmp->nm_mountp;
4730 NFSLOCKCLSTATE();
4731 /*
4732 * Loop around waiting for:
4733 * - outstanding I/O operations on delegations to complete
4734 * - for a delegation on vp that has state, lock the client and
4735 * do a recall
4736 * - return delegation with no state
4737 */
4738 while (1) {
4739 clp = nfscl_findcl(nmp);
4740 if (clp == NULL) {
4741 NFSUNLOCKCLSTATE();
4742 return (retcnt);
4743 }
4744 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4745 np->n_fhp->nfh_len);
4746 if (dp != NULL) {
4747 /*
4748 * Wait for outstanding I/O ops to be done.
4749 */
4750 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4751 if (igotlock) {
4752 nfsv4_unlock(&clp->nfsc_lock, 0);
4753 igotlock = 0;
4754 }
4755 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4756 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4757 "nfscld", hz);
4758 if (NFSCL_FORCEDISM(mp)) {
4759 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4760 NFSUNLOCKCLSTATE();
4761 return (0);
4762 }
4763 continue;
4764 }
4765 needsrecall = 0;
4766 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4767 if (!LIST_EMPTY(&owp->nfsow_open)) {
4768 needsrecall = 1;
4769 break;
4770 }
4771 }
4772 if (!needsrecall) {
4773 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4774 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4775 needsrecall = 1;
4776 break;
4777 }
4778 }
4779 }
4780 if (needsrecall && !triedrecall) {
4781 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4782 islept = 0;
4783 while (!igotlock) {
4784 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4785 &islept, NFSCLSTATEMUTEXPTR, mp);
4786 if (NFSCL_FORCEDISM(mp)) {
4787 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4788 if (igotlock)
4789 nfsv4_unlock(&clp->nfsc_lock, 0);
4790 NFSUNLOCKCLSTATE();
4791 return (0);
4792 }
4793 if (islept)
4794 break;
4795 }
4796 if (islept)
4797 continue;
4798 NFSUNLOCKCLSTATE();
4799 cred = newnfs_getcred();
4800 newnfs_copycred(&dp->nfsdl_cred, cred);
4801 nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0, NULL);
4802 NFSFREECRED(cred);
4803 triedrecall = 1;
4804 NFSLOCKCLSTATE();
4805 nfsv4_unlock(&clp->nfsc_lock, 0);
4806 igotlock = 0;
4807 continue;
4808 }
4809 *stp = dp->nfsdl_stateid;
4810 retcnt = 1;
4811 nfscl_cleandeleg(dp);
4812 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4813 }
4814 if (igotlock)
4815 nfsv4_unlock(&clp->nfsc_lock, 0);
4816 NFSUNLOCKCLSTATE();
4817 return (retcnt);
4818 }
4819 }
4820
4821 /*
4822 * Look for associated delegation(s) that should be DelegReturned.
4823 */
4824 int
4825 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
4826 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
4827 {
4828 struct nfsclclient *clp;
4829 struct nfscldeleg *dp;
4830 struct nfsclowner *owp;
4831 struct nfscllockowner *lp;
4832 struct nfsmount *nmp;
4833 struct mount *mp;
4834 struct ucred *cred;
4835 struct nfsnode *np;
4836 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4837
4838 nmp = VFSTONFS(fvp->v_mount);
4839 *gotfdp = 0;
4840 *gottdp = 0;
4841 if (NFSHASPNFS(nmp))
4842 return (retcnt);
4843 NFSLOCKMNT(nmp);
4844 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4845 NFSUNLOCKMNT(nmp);
4846 return (retcnt);
4847 }
4848 NFSUNLOCKMNT(nmp);
4849 mp = nmp->nm_mountp;
4850 NFSLOCKCLSTATE();
4851 /*
4852 * Loop around waiting for:
4853 * - outstanding I/O operations on delegations to complete
4854 * - for a delegation on fvp that has state, lock the client and
4855 * do a recall
4856 * - return delegation(s) with no state.
4857 */
4858 while (1) {
4859 clp = nfscl_findcl(nmp);
4860 if (clp == NULL) {
4861 NFSUNLOCKCLSTATE();
4862 return (retcnt);
4863 }
4864 np = VTONFS(fvp);
4865 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4866 np->n_fhp->nfh_len);
4867 if (dp != NULL && *gotfdp == 0) {
4868 /*
4869 * Wait for outstanding I/O ops to be done.
4870 */
4871 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4872 if (igotlock) {
4873 nfsv4_unlock(&clp->nfsc_lock, 0);
4874 igotlock = 0;
4875 }
4876 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4877 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4878 "nfscld", hz);
4879 if (NFSCL_FORCEDISM(mp)) {
4880 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4881 NFSUNLOCKCLSTATE();
4882 *gotfdp = 0;
4883 *gottdp = 0;
4884 return (0);
4885 }
4886 continue;
4887 }
4888 needsrecall = 0;
4889 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4890 if (!LIST_EMPTY(&owp->nfsow_open)) {
4891 needsrecall = 1;
4892 break;
4893 }
4894 }
4895 if (!needsrecall) {
4896 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4897 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4898 needsrecall = 1;
4899 break;
4900 }
4901 }
4902 }
4903 if (needsrecall && !triedrecall) {
4904 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4905 islept = 0;
4906 while (!igotlock) {
4907 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4908 &islept, NFSCLSTATEMUTEXPTR, mp);
4909 if (NFSCL_FORCEDISM(mp)) {
4910 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4911 if (igotlock)
4912 nfsv4_unlock(&clp->nfsc_lock, 0);
4913 NFSUNLOCKCLSTATE();
4914 *gotfdp = 0;
4915 *gottdp = 0;
4916 return (0);
4917 }
4918 if (islept)
4919 break;
4920 }
4921 if (islept)
4922 continue;
4923 NFSUNLOCKCLSTATE();
4924 cred = newnfs_getcred();
4925 newnfs_copycred(&dp->nfsdl_cred, cred);
4926 nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0, NULL);
4927 NFSFREECRED(cred);
4928 triedrecall = 1;
4929 NFSLOCKCLSTATE();
4930 nfsv4_unlock(&clp->nfsc_lock, 0);
4931 igotlock = 0;
4932 continue;
4933 }
4934 *fstp = dp->nfsdl_stateid;
4935 retcnt++;
4936 *gotfdp = 1;
4937 nfscl_cleandeleg(dp);
4938 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4939 }
4940 if (igotlock) {
4941 nfsv4_unlock(&clp->nfsc_lock, 0);
4942 igotlock = 0;
4943 }
4944 if (tvp != NULL) {
4945 np = VTONFS(tvp);
4946 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4947 np->n_fhp->nfh_len);
4948 if (dp != NULL && *gottdp == 0) {
4949 /*
4950 * Wait for outstanding I/O ops to be done.
4951 */
4952 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4953 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4954 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4955 "nfscld", hz);
4956 if (NFSCL_FORCEDISM(mp)) {
4957 NFSUNLOCKCLSTATE();
4958 *gotfdp = 0;
4959 *gottdp = 0;
4960 return (0);
4961 }
4962 continue;
4963 }
4964 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4965 if (!LIST_EMPTY(&owp->nfsow_open)) {
4966 NFSUNLOCKCLSTATE();
4967 return (retcnt);
4968 }
4969 }
4970 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4971 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4972 NFSUNLOCKCLSTATE();
4973 return (retcnt);
4974 }
4975 }
4976 *tstp = dp->nfsdl_stateid;
4977 retcnt++;
4978 *gottdp = 1;
4979 nfscl_cleandeleg(dp);
4980 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4981 }
4982 }
4983 NFSUNLOCKCLSTATE();
4984 return (retcnt);
4985 }
4986 }
4987
4988 /*
4989 * Get a reference on the clientid associated with the mount point.
4990 * Return 1 if success, 0 otherwise.
4991 */
4992 int
4993 nfscl_getref(struct nfsmount *nmp)
4994 {
4995 struct nfsclclient *clp;
4996 int ret;
4997
4998 NFSLOCKCLSTATE();
4999 clp = nfscl_findcl(nmp);
5000 if (clp == NULL) {
5001 NFSUNLOCKCLSTATE();
5002 return (0);
5003 }
5004 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, nmp->nm_mountp);
5005 ret = 1;
5006 if (NFSCL_FORCEDISM(nmp->nm_mountp))
5007 ret = 0;
5008 NFSUNLOCKCLSTATE();
5009 return (ret);
5010 }
5011
5012 /*
5013 * Release a reference on a clientid acquired with the above call.
5014 */
5015 void
5016 nfscl_relref(struct nfsmount *nmp)
5017 {
5018 struct nfsclclient *clp;
5019
5020 NFSLOCKCLSTATE();
5021 clp = nfscl_findcl(nmp);
5022 if (clp == NULL) {
5023 NFSUNLOCKCLSTATE();
5024 return;
5025 }
5026 nfsv4_relref(&clp->nfsc_lock);
5027 NFSUNLOCKCLSTATE();
5028 }
5029
5030 /*
5031 * Save the size attribute in the delegation, since the nfsnode
5032 * is going away.
5033 */
5034 void
5035 nfscl_reclaimnode(vnode_t vp)
5036 {
5037 struct nfsclclient *clp;
5038 struct nfscldeleg *dp;
5039 struct nfsnode *np = VTONFS(vp);
5040 struct nfsmount *nmp;
5041
5042 nmp = VFSTONFS(vp->v_mount);
5043 if (!NFSHASNFSV4(nmp))
5044 return;
5045 NFSLOCKCLSTATE();
5046 clp = nfscl_findcl(nmp);
5047 if (clp == NULL) {
5048 NFSUNLOCKCLSTATE();
5049 return;
5050 }
5051 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5052 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
5053 dp->nfsdl_size = np->n_size;
5054 NFSUNLOCKCLSTATE();
5055 }
5056
5057 /*
5058 * Get the saved size attribute in the delegation, since it is a
5059 * newly allocated nfsnode.
5060 */
5061 void
5062 nfscl_newnode(vnode_t vp)
5063 {
5064 struct nfsclclient *clp;
5065 struct nfscldeleg *dp;
5066 struct nfsnode *np = VTONFS(vp);
5067 struct nfsmount *nmp;
5068
5069 nmp = VFSTONFS(vp->v_mount);
5070 if (!NFSHASNFSV4(nmp))
5071 return;
5072 NFSLOCKCLSTATE();
5073 clp = nfscl_findcl(nmp);
5074 if (clp == NULL) {
5075 NFSUNLOCKCLSTATE();
5076 return;
5077 }
5078 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5079 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
5080 np->n_size = dp->nfsdl_size;
5081 NFSUNLOCKCLSTATE();
5082 }
5083
5084 /*
5085 * If there is a valid write delegation for this file, set the modtime
5086 * to the local clock time.
5087 */
5088 void
5089 nfscl_delegmodtime(vnode_t vp)
5090 {
5091 struct nfsclclient *clp;
5092 struct nfscldeleg *dp;
5093 struct nfsnode *np = VTONFS(vp);
5094 struct nfsmount *nmp;
5095
5096 nmp = VFSTONFS(vp->v_mount);
5097 if (!NFSHASNFSV4(nmp))
5098 return;
5099 NFSLOCKMNT(nmp);
5100 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
5101 NFSUNLOCKMNT(nmp);
5102 return;
5103 }
5104 NFSUNLOCKMNT(nmp);
5105 NFSLOCKCLSTATE();
5106 clp = nfscl_findcl(nmp);
5107 if (clp == NULL) {
5108 NFSUNLOCKCLSTATE();
5109 return;
5110 }
5111 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5112 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
5113 nanotime(&dp->nfsdl_modtime);
5114 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
5115 }
5116 NFSUNLOCKCLSTATE();
5117 }
5118
5119 /*
5120 * If there is a valid write delegation for this file with a modtime set,
5121 * put that modtime in mtime.
5122 */
5123 void
5124 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
5125 {
5126 struct nfsclclient *clp;
5127 struct nfscldeleg *dp;
5128 struct nfsnode *np = VTONFS(vp);
5129 struct nfsmount *nmp;
5130
5131 nmp = VFSTONFS(vp->v_mount);
5132 if (!NFSHASNFSV4(nmp))
5133 return;
5134 NFSLOCKMNT(nmp);
5135 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
5136 NFSUNLOCKMNT(nmp);
5137 return;
5138 }
5139 NFSUNLOCKMNT(nmp);
5140 NFSLOCKCLSTATE();
5141 clp = nfscl_findcl(nmp);
5142 if (clp == NULL) {
5143 NFSUNLOCKCLSTATE();
5144 return;
5145 }
5146 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5147 if (dp != NULL &&
5148 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
5149 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
5150 *mtime = dp->nfsdl_modtime;
5151 NFSUNLOCKCLSTATE();
5152 }
5153
5154 static int
5155 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
5156 {
5157 short *defaulterrp, *errp;
5158
5159 if (!nd->nd_repstat)
5160 return (0);
5161 if (nd->nd_procnum == NFSPROC_NOOP)
5162 return (txdr_unsigned(nd->nd_repstat & 0xffff));
5163 if (nd->nd_repstat == EBADRPC)
5164 return (txdr_unsigned(NFSERR_BADXDR));
5165 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
5166 nd->nd_repstat == NFSERR_OPILLEGAL)
5167 return (txdr_unsigned(nd->nd_repstat));
5168 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
5169 minorvers > NFSV4_MINORVERSION) {
5170 /* NFSv4.n error. */
5171 return (txdr_unsigned(nd->nd_repstat));
5172 }
5173 if (nd->nd_procnum < NFSV4OP_CBNOPS)
5174 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
5175 else
5176 return (txdr_unsigned(nd->nd_repstat));
5177 while (*++errp)
5178 if (*errp == (short)nd->nd_repstat)
5179 return (txdr_unsigned(nd->nd_repstat));
5180 return (txdr_unsigned(*defaulterrp));
5181 }
5182
5183 /*
5184 * Called to find/add a layout to a client.
5185 * This function returns the layout with a refcnt (shared lock) upon
5186 * success (returns 0) or with no lock/refcnt on the layout when an
5187 * error is returned.
5188 * If a layout is passed in via lypp, it is locked (exclusively locked).
5189 */
5190 int
5191 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
5192 nfsv4stateid_t *stateidp, int layouttype, int retonclose,
5193 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
5194 struct ucred *cred, NFSPROC_T *p)
5195 {
5196 struct nfsclclient *clp;
5197 struct nfscllayout *lyp, *tlyp;
5198 struct nfsclflayout *flp;
5199 struct nfsnode *np = VTONFS(vp);
5200 mount_t mp;
5201 int layout_passed_in;
5202
5203 mp = nmp->nm_mountp;
5204 layout_passed_in = 1;
5205 tlyp = NULL;
5206 lyp = *lypp;
5207 if (lyp == NULL) {
5208 layout_passed_in = 0;
5209 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
5210 M_WAITOK | M_ZERO);
5211 }
5212
5213 NFSLOCKCLSTATE();
5214 clp = nmp->nm_clp;
5215 if (clp == NULL) {
5216 if (layout_passed_in != 0)
5217 nfsv4_unlock(&lyp->nfsly_lock, 0);
5218 NFSUNLOCKCLSTATE();
5219 if (tlyp != NULL)
5220 free(tlyp, M_NFSLAYOUT);
5221 return (EPERM);
5222 }
5223 if (lyp == NULL) {
5224 /*
5225 * Although no lyp was passed in, another thread might have
5226 * allocated one. If one is found, just increment it's ref
5227 * count and return it.
5228 */
5229 lyp = nfscl_findlayout(clp, fhp, fhlen);
5230 if (lyp == NULL) {
5231 lyp = tlyp;
5232 tlyp = NULL;
5233 lyp->nfsly_stateid.seqid = stateidp->seqid;
5234 lyp->nfsly_stateid.other[0] = stateidp->other[0];
5235 lyp->nfsly_stateid.other[1] = stateidp->other[1];
5236 lyp->nfsly_stateid.other[2] = stateidp->other[2];
5237 lyp->nfsly_lastbyte = 0;
5238 LIST_INIT(&lyp->nfsly_flayread);
5239 LIST_INIT(&lyp->nfsly_flayrw);
5240 LIST_INIT(&lyp->nfsly_recall);
5241 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
5242 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
5243 lyp->nfsly_clp = clp;
5244 if (layouttype == NFSLAYOUT_FLEXFILE)
5245 lyp->nfsly_flags = NFSLY_FLEXFILE;
5246 else
5247 lyp->nfsly_flags = NFSLY_FILES;
5248 if (retonclose != 0)
5249 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
5250 lyp->nfsly_fhlen = fhlen;
5251 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
5252 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5253 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
5254 nfsly_hash);
5255 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5256 nfscl_layoutcnt++;
5257 nfsstatsv1.cllayouts++;
5258 } else {
5259 if (retonclose != 0)
5260 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
5261 if (stateidp->seqid > lyp->nfsly_stateid.seqid)
5262 lyp->nfsly_stateid.seqid = stateidp->seqid;
5263 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
5264 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5265 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5266 }
5267 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5268 if (NFSCL_FORCEDISM(mp)) {
5269 NFSUNLOCKCLSTATE();
5270 if (tlyp != NULL)
5271 free(tlyp, M_NFSLAYOUT);
5272 return (EPERM);
5273 }
5274 *lypp = lyp;
5275 } else if (stateidp->seqid > lyp->nfsly_stateid.seqid)
5276 lyp->nfsly_stateid.seqid = stateidp->seqid;
5277
5278 /* Merge the new list of File Layouts into the list. */
5279 flp = LIST_FIRST(fhlp);
5280 if (flp != NULL) {
5281 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
5282 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
5283 else
5284 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
5285 }
5286 if (layout_passed_in != 0)
5287 nfsv4_unlock(&lyp->nfsly_lock, 1);
5288 NFSUNLOCKCLSTATE();
5289 if (tlyp != NULL)
5290 free(tlyp, M_NFSLAYOUT);
5291 return (0);
5292 }
5293
5294 /*
5295 * Search for a layout by MDS file handle.
5296 * If one is found, it is returned with a refcnt (shared lock) iff
5297 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
5298 * returned NULL.
5299 */
5300 struct nfscllayout *
5301 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
5302 uint64_t off, uint32_t rwaccess, struct nfsclflayout **retflpp,
5303 int *recalledp)
5304 {
5305 struct nfscllayout *lyp;
5306 mount_t mp;
5307 int error, igotlock;
5308
5309 mp = clp->nfsc_nmp->nm_mountp;
5310 *recalledp = 0;
5311 *retflpp = NULL;
5312 NFSLOCKCLSTATE();
5313 lyp = nfscl_findlayout(clp, fhp, fhlen);
5314 if (lyp != NULL) {
5315 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5316 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
5317 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5318 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5319 error = nfscl_findlayoutforio(lyp, off, rwaccess,
5320 retflpp);
5321 if (error == 0)
5322 nfsv4_getref(&lyp->nfsly_lock, NULL,
5323 NFSCLSTATEMUTEXPTR, mp);
5324 else {
5325 do {
5326 igotlock = nfsv4_lock(&lyp->nfsly_lock,
5327 1, NULL, NFSCLSTATEMUTEXPTR, mp);
5328 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
5329 *retflpp = NULL;
5330 }
5331 if (NFSCL_FORCEDISM(mp)) {
5332 lyp = NULL;
5333 *recalledp = 1;
5334 }
5335 } else {
5336 lyp = NULL;
5337 *recalledp = 1;
5338 }
5339 }
5340 NFSUNLOCKCLSTATE();
5341 return (lyp);
5342 }
5343
5344 /*
5345 * Search for a layout by MDS file handle. If one is found, mark in to be
5346 * recalled, if it already marked "return on close".
5347 */
5348 static void
5349 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
5350 int fhlen, struct nfsclrecalllayout **recallpp, struct nfscllayout **lypp)
5351 {
5352 struct nfscllayout *lyp;
5353 uint32_t iomode;
5354
5355 *lypp = NULL;
5356 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vp->v_mount)) ||
5357 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
5358 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
5359 return;
5360 lyp = nfscl_findlayout(clp, fhp, fhlen);
5361 if (lyp != NULL && (lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) {
5362 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5363 iomode = 0;
5364 if (!LIST_EMPTY(&lyp->nfsly_flayread))
5365 iomode |= NFSLAYOUTIOMODE_READ;
5366 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
5367 iomode |= NFSLAYOUTIOMODE_RW;
5368 nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
5369 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL,
5370 *recallpp);
5371 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
5372 *recallpp = NULL;
5373 }
5374
5375 /* Now, wake up renew thread to do LayoutReturn. */
5376 wakeup(clp);
5377 *lypp = lyp;
5378 }
5379 }
5380
5381 /*
5382 * Mark the layout to be recalled and with an error.
5383 * Also, disable the dsp from further use.
5384 */
5385 void
5386 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp,
5387 struct nfscllayout *lyp, struct nfsclds *dsp)
5388 {
5389 struct nfsclrecalllayout *recallp;
5390 uint32_t iomode;
5391
5392 printf("DS being disabled, error=%d\n", stat);
5393 /* Set up the return of the layout. */
5394 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
5395 iomode = 0;
5396 NFSLOCKCLSTATE();
5397 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5398 if (!LIST_EMPTY(&lyp->nfsly_flayread))
5399 iomode |= NFSLAYOUTIOMODE_READ;
5400 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
5401 iomode |= NFSLAYOUTIOMODE_RW;
5402 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
5403 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op,
5404 dp->nfsdi_deviceid, recallp);
5405 NFSUNLOCKCLSTATE();
5406 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode);
5407 } else {
5408 NFSUNLOCKCLSTATE();
5409 free(recallp, M_NFSLAYRECALL);
5410 }
5411
5412 /* And shut the TCP connection down. */
5413 nfscl_cancelreqs(dsp);
5414 }
5415
5416 /*
5417 * Cancel all RPCs for this "dsp" by closing the connection.
5418 * Also, mark the session as defunct.
5419 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and
5420 * cannot be shut down.
5421 */
5422 void
5423 nfscl_cancelreqs(struct nfsclds *dsp)
5424 {
5425 struct __rpc_client *cl;
5426 static int non_event;
5427
5428 NFSLOCKDS(dsp);
5429 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 &&
5430 dsp->nfsclds_sockp != NULL &&
5431 dsp->nfsclds_sockp->nr_client != NULL) {
5432 dsp->nfsclds_flags |= NFSCLDS_CLOSED;
5433 cl = dsp->nfsclds_sockp->nr_client;
5434 dsp->nfsclds_sess.nfsess_defunct = 1;
5435 NFSUNLOCKDS(dsp);
5436 CLNT_CLOSE(cl);
5437 /*
5438 * This 1sec sleep is done to reduce the number of reconnect
5439 * attempts made on the DS while it has failed.
5440 */
5441 tsleep(&non_event, PVFS, "ndscls", hz);
5442 return;
5443 }
5444 NFSUNLOCKDS(dsp);
5445 }
5446
5447 /*
5448 * Dereference a layout.
5449 */
5450 void
5451 nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
5452 {
5453
5454 NFSLOCKCLSTATE();
5455 if (exclocked != 0)
5456 nfsv4_unlock(&lyp->nfsly_lock, 0);
5457 else
5458 nfsv4_relref(&lyp->nfsly_lock);
5459 NFSUNLOCKCLSTATE();
5460 }
5461
5462 /*
5463 * Search for a devinfo by deviceid. If one is found, return it after
5464 * acquiring a reference count on it.
5465 */
5466 struct nfscldevinfo *
5467 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
5468 struct nfscldevinfo *dip)
5469 {
5470
5471 NFSLOCKCLSTATE();
5472 if (dip == NULL)
5473 dip = nfscl_finddevinfo(clp, deviceid);
5474 if (dip != NULL)
5475 dip->nfsdi_refcnt++;
5476 NFSUNLOCKCLSTATE();
5477 return (dip);
5478 }
5479
5480 /*
5481 * Dereference a devinfo structure.
5482 */
5483 static void
5484 nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
5485 {
5486
5487 dip->nfsdi_refcnt--;
5488 if (dip->nfsdi_refcnt == 0)
5489 wakeup(&dip->nfsdi_refcnt);
5490 }
5491
5492 /*
5493 * Dereference a devinfo structure.
5494 */
5495 void
5496 nfscl_reldevinfo(struct nfscldevinfo *dip)
5497 {
5498
5499 NFSLOCKCLSTATE();
5500 nfscl_reldevinfo_locked(dip);
5501 NFSUNLOCKCLSTATE();
5502 }
5503
5504 /*
5505 * Find a layout for this file handle. Return NULL upon failure.
5506 */
5507 static struct nfscllayout *
5508 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
5509 {
5510 struct nfscllayout *lyp;
5511
5512 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
5513 if (lyp->nfsly_fhlen == fhlen &&
5514 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
5515 break;
5516 return (lyp);
5517 }
5518
5519 /*
5520 * Find a devinfo for this deviceid. Return NULL upon failure.
5521 */
5522 static struct nfscldevinfo *
5523 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
5524 {
5525 struct nfscldevinfo *dip;
5526
5527 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
5528 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
5529 == 0)
5530 break;
5531 return (dip);
5532 }
5533
5534 /*
5535 * Merge the new file layout list into the main one, maintaining it in
5536 * increasing offset order.
5537 */
5538 static void
5539 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
5540 struct nfsclflayouthead *newfhlp)
5541 {
5542 struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
5543
5544 flp = LIST_FIRST(fhlp);
5545 prevflp = NULL;
5546 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
5547 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
5548 prevflp = flp;
5549 flp = LIST_NEXT(flp, nfsfl_list);
5550 }
5551 if (prevflp == NULL)
5552 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
5553 else
5554 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
5555 prevflp = nflp;
5556 }
5557 }
5558
5559 /*
5560 * Add this nfscldevinfo to the client, if it doesn't already exist.
5561 * This function consumes the structure pointed at by dip, if not NULL.
5562 */
5563 int
5564 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind,
5565 struct nfsclflayout *flp)
5566 {
5567 struct nfsclclient *clp;
5568 struct nfscldevinfo *tdip;
5569 uint8_t *dev;
5570
5571 NFSLOCKCLSTATE();
5572 clp = nmp->nm_clp;
5573 if (clp == NULL) {
5574 NFSUNLOCKCLSTATE();
5575 if (dip != NULL)
5576 free(dip, M_NFSDEVINFO);
5577 return (ENODEV);
5578 }
5579 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5580 dev = flp->nfsfl_dev;
5581 else
5582 dev = flp->nfsfl_ffm[ind].dev;
5583 tdip = nfscl_finddevinfo(clp, dev);
5584 if (tdip != NULL) {
5585 tdip->nfsdi_layoutrefs++;
5586 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5587 flp->nfsfl_devp = tdip;
5588 else
5589 flp->nfsfl_ffm[ind].devp = tdip;
5590 nfscl_reldevinfo_locked(tdip);
5591 NFSUNLOCKCLSTATE();
5592 if (dip != NULL)
5593 free(dip, M_NFSDEVINFO);
5594 return (0);
5595 }
5596 if (dip != NULL) {
5597 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
5598 dip->nfsdi_layoutrefs = 1;
5599 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5600 flp->nfsfl_devp = dip;
5601 else
5602 flp->nfsfl_ffm[ind].devp = dip;
5603 }
5604 NFSUNLOCKCLSTATE();
5605 if (dip == NULL)
5606 return (ENODEV);
5607 return (0);
5608 }
5609
5610 /*
5611 * Free up a layout structure and associated file layout structure(s).
5612 */
5613 void
5614 nfscl_freelayout(struct nfscllayout *layp)
5615 {
5616 struct nfsclflayout *flp, *nflp;
5617 struct nfsclrecalllayout *rp, *nrp;
5618
5619 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
5620 LIST_REMOVE(flp, nfsfl_list);
5621 nfscl_freeflayout(flp);
5622 }
5623 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
5624 LIST_REMOVE(flp, nfsfl_list);
5625 nfscl_freeflayout(flp);
5626 }
5627 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
5628 LIST_REMOVE(rp, nfsrecly_list);
5629 free(rp, M_NFSLAYRECALL);
5630 }
5631 nfscl_layoutcnt--;
5632 nfsstatsv1.cllayouts--;
5633 free(layp, M_NFSLAYOUT);
5634 }
5635
5636 /*
5637 * Free up a file layout structure.
5638 */
5639 void
5640 nfscl_freeflayout(struct nfsclflayout *flp)
5641 {
5642 int i, j;
5643
5644 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) {
5645 for (i = 0; i < flp->nfsfl_fhcnt; i++)
5646 free(flp->nfsfl_fh[i], M_NFSFH);
5647 if (flp->nfsfl_devp != NULL)
5648 flp->nfsfl_devp->nfsdi_layoutrefs--;
5649 }
5650 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0)
5651 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) {
5652 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++)
5653 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH);
5654 if (flp->nfsfl_ffm[i].devp != NULL)
5655 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--;
5656 }
5657 free(flp, M_NFSFLAYOUT);
5658 }
5659
5660 /*
5661 * Free up a file layout devinfo structure.
5662 */
5663 void
5664 nfscl_freedevinfo(struct nfscldevinfo *dip)
5665 {
5666
5667 free(dip, M_NFSDEVINFO);
5668 }
5669
5670 /*
5671 * Mark any layouts that match as recalled.
5672 */
5673 static int
5674 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
5675 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op,
5676 char *devid, struct nfsclrecalllayout *recallp)
5677 {
5678 struct nfsclrecalllayout *rp, *orp;
5679
5680 recallp->nfsrecly_recalltype = recalltype;
5681 recallp->nfsrecly_iomode = iomode;
5682 recallp->nfsrecly_stateseqid = stateseqid;
5683 recallp->nfsrecly_off = off;
5684 recallp->nfsrecly_len = len;
5685 recallp->nfsrecly_stat = stat;
5686 recallp->nfsrecly_op = op;
5687 if (devid != NULL)
5688 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID);
5689 /*
5690 * Order the list as file returns first, followed by fsid and any
5691 * returns, both in increasing stateseqid order.
5692 * Note that the seqids wrap around, so 1 is after 0xffffffff.
5693 * (I'm not sure this is correct because I find RFC5661 confusing
5694 * on this, but hopefully it will work ok.)
5695 */
5696 orp = NULL;
5697 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5698 orp = rp;
5699 if ((recalltype == NFSLAYOUTRETURN_FILE &&
5700 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
5701 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
5702 (recalltype != NFSLAYOUTRETURN_FILE &&
5703 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
5704 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
5705 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
5706 break;
5707 }
5708
5709 /*
5710 * Put any error return on all the file returns that will
5711 * preceed this one.
5712 */
5713 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE &&
5714 stat != 0 && rp->nfsrecly_stat == 0) {
5715 rp->nfsrecly_stat = stat;
5716 rp->nfsrecly_op = op;
5717 if (devid != NULL)
5718 NFSBCOPY(devid, rp->nfsrecly_devid,
5719 NFSX_V4DEVICEID);
5720 }
5721 }
5722 if (rp == NULL) {
5723 if (orp == NULL)
5724 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
5725 nfsrecly_list);
5726 else
5727 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
5728 }
5729 lyp->nfsly_flags |= NFSLY_RECALL;
5730 wakeup(lyp->nfsly_clp);
5731 return (0);
5732 }
5733
5734 /*
5735 * Compare the two seqids for ordering. The trick is that the seqids can
5736 * wrap around from 0xffffffff->0, so check for the cases where one
5737 * has wrapped around.
5738 * Return 1 if seqid1 comes before seqid2, 0 otherwise.
5739 */
5740 static int
5741 nfscl_seq(uint32_t seqid1, uint32_t seqid2)
5742 {
5743
5744 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
5745 /* seqid2 has wrapped around. */
5746 return (0);
5747 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
5748 /* seqid1 has wrapped around. */
5749 return (1);
5750 if (seqid1 <= seqid2)
5751 return (1);
5752 return (0);
5753 }
5754
5755 /*
5756 * Do a layout return for each of the recalls.
5757 */
5758 static void
5759 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
5760 struct ucred *cred, NFSPROC_T *p)
5761 {
5762 struct nfsclrecalllayout *rp;
5763 nfsv4stateid_t stateid;
5764 int layouttype;
5765
5766 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
5767 stateid.seqid = lyp->nfsly_stateid.seqid;
5768 if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5769 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5770 else
5771 layouttype = NFSLAYOUT_FLEXFILE;
5772 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5773 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
5774 lyp->nfsly_fhlen, 0, layouttype,
5775 rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
5776 rp->nfsrecly_off, rp->nfsrecly_len,
5777 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op,
5778 rp->nfsrecly_devid);
5779 }
5780 }
5781
5782 /*
5783 * Do the layout commit for a file layout.
5784 */
5785 static void
5786 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
5787 struct ucred *cred, NFSPROC_T *p)
5788 {
5789 struct nfsclflayout *flp;
5790 uint64_t len;
5791 int error, layouttype;
5792
5793 if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5794 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5795 else
5796 layouttype = NFSLAYOUT_FLEXFILE;
5797 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
5798 if (layouttype == NFSLAYOUT_FLEXFILE &&
5799 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) {
5800 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n");
5801 /* If not supported, don't bother doing it. */
5802 NFSLOCKMNT(nmp);
5803 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5804 NFSUNLOCKMNT(nmp);
5805 break;
5806 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
5807 len = flp->nfsfl_end - flp->nfsfl_off;
5808 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
5809 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
5810 lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
5811 layouttype, cred, p);
5812 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
5813 if (error == NFSERR_NOTSUPP) {
5814 /* If not supported, don't bother doing it. */
5815 NFSLOCKMNT(nmp);
5816 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5817 NFSUNLOCKMNT(nmp);
5818 break;
5819 }
5820 }
5821 }
5822 }
5823
5824 /*
5825 * Commit all layouts for a file (vnode).
5826 */
5827 int
5828 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
5829 {
5830 struct nfsclclient *clp;
5831 struct nfscllayout *lyp;
5832 struct nfsnode *np = VTONFS(vp);
5833 mount_t mp;
5834 struct nfsmount *nmp;
5835
5836 mp = vp->v_mount;
5837 nmp = VFSTONFS(mp);
5838 if (NFSHASNOLAYOUTCOMMIT(nmp))
5839 return (0);
5840 NFSLOCKCLSTATE();
5841 clp = nmp->nm_clp;
5842 if (clp == NULL) {
5843 NFSUNLOCKCLSTATE();
5844 return (EPERM);
5845 }
5846 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5847 if (lyp == NULL) {
5848 NFSUNLOCKCLSTATE();
5849 return (EPERM);
5850 }
5851 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5852 if (NFSCL_FORCEDISM(mp)) {
5853 NFSUNLOCKCLSTATE();
5854 return (EPERM);
5855 }
5856 tryagain:
5857 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
5858 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
5859 NFSUNLOCKCLSTATE();
5860 NFSCL_DEBUG(4, "do layoutcommit2\n");
5861 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
5862 NFSLOCKCLSTATE();
5863 goto tryagain;
5864 }
5865 nfsv4_relref(&lyp->nfsly_lock);
5866 NFSUNLOCKCLSTATE();
5867 return (0);
5868 }
Cache object: 767fbadfb09aaf80140ad9fb877485da
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