1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 /*
32 * These functions implement the client side state handling for NFSv4.
33 * NFSv4 state handling:
34 * - A lockowner is used to determine lock contention, so it
35 * corresponds directly to a Posix pid. (1 to 1 mapping)
36 * - The correct granularity of an OpenOwner is not nearly so
37 * obvious. An OpenOwner does the following:
38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
39 * - is used to check for Open/Share contention (not applicable to
40 * this client, since all Opens are Deny_None)
41 * As such, I considered both extreme.
42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes
43 * all Open, Close and Lock (with a new lockowner) Ops.
44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for
45 * every Open, for most servers.
46 * So, I chose to use the same mapping as I did for LockOwnwers.
47 * The main concern here is that you can end up with multiple Opens
48 * for the same File Handle, but on different OpenOwners (opens
49 * inherited from parents, grandparents...) and you do not know
50 * which of these the vnodeop close applies to. This is handled by
51 * delaying the Close Op(s) until all of the Opens have been closed.
52 * (It is not yet obvious if this is the correct granularity.)
53 * - How the code handles serialization:
54 * - For the ClientId, it uses an exclusive lock while getting its
55 * SetClientId and during recovery. Otherwise, it uses a shared
56 * lock via a reference count.
57 * - For the rest of the data structures, it uses an SMP mutex
58 * (once the nfs client is SMP safe) and doesn't sleep while
59 * manipulating the linked lists.
60 * - The serialization of Open/Close/Lock/LockU falls out in the
61 * "wash", since OpenOwners and LockOwners are both mapped from
62 * Posix pid. In other words, there is only one Posix pid using
63 * any given owner, so that owner is serialized. (If you change
64 * the granularity of the OpenOwner, then code must be added to
65 * serialize Ops on the OpenOwner.)
66 * - When to get rid of OpenOwners and LockOwners.
67 * - The function nfscl_cleanup_common() is executed after a process exits.
68 * It goes through the client list looking for all Open and Lock Owners.
69 * When one is found, it is marked "defunct" or in the case of
70 * an OpenOwner without any Opens, freed.
71 * The renew thread scans for defunct Owners and gets rid of them,
72 * if it can. The LockOwners will also be deleted when the
73 * associated Open is closed.
74 * - If the LockU or Close Op(s) fail during close in a way
75 * that could be recovered upon retry, they are relinked to the
76 * ClientId's defunct open list and retried by the renew thread
77 * until they succeed or an unmount/recovery occurs.
78 * (Since we are done with them, they do not need to be recovered.)
79 */
80
81 #include <fs/nfs/nfsport.h>
82
83 /*
84 * Global variables
85 */
86 extern struct nfsstatsv1 nfsstatsv1;
87 extern struct nfsreqhead nfsd_reqq;
88 extern u_int32_t newnfs_false, newnfs_true;
89 extern int nfscl_debuglevel;
90 extern int nfscl_enablecallb;
91 extern int nfs_numnfscbd;
92 NFSREQSPINLOCK;
93 NFSCLSTATEMUTEX;
94 int nfscl_inited = 0;
95 struct nfsclhead nfsclhead; /* Head of clientid list */
96
97 static int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
98 static int nfscl_delegcnt = 0;
99 static int nfscl_layoutcnt = 0;
100 static int nfscl_getopen(struct nfsclownerhead *, struct nfsclopenhash *,
101 u_int8_t *, int, u_int8_t *, u_int8_t *, u_int32_t,
102 struct nfscllockowner **, struct nfsclopen **);
103 static bool nfscl_checkown(struct nfsclowner *, struct nfsclopen *, uint8_t *,
104 uint8_t *, struct nfscllockowner **, struct nfsclopen **,
105 struct nfsclopen **);
106 static void nfscl_clrelease(struct nfsclclient *);
107 static void nfscl_unlinkopen(struct nfsclopen *);
108 static void nfscl_cleanclient(struct nfsclclient *);
109 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
110 struct ucred *, NFSPROC_T *);
111 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
112 struct nfsmount *, struct ucred *, NFSPROC_T *);
113 static void nfscl_recover(struct nfsclclient *, bool *, struct ucred *,
114 NFSPROC_T *);
115 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
116 struct nfscllock *, int);
117 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
118 struct nfscllock **, int);
119 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *,
120 struct nfscldeleghead *);
121 static u_int32_t nfscl_nextcbident(void);
122 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **);
123 static struct nfsclclient *nfscl_getclnt(u_int32_t);
124 static struct nfsclclient *nfscl_getclntsess(uint8_t *);
125 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
126 int);
127 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *,
128 int, struct nfsclrecalllayout **, struct nfscllayout **);
129 static void nfscl_reldevinfo_locked(struct nfscldevinfo *);
130 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *,
131 int);
132 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *);
133 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
134 u_int8_t *, struct nfscllock **);
135 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
136 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
137 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
138 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
139 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
140 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *);
141 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
142 struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
143 struct nfscldeleg *, struct ucred *, NFSPROC_T *);
144 static void nfscl_totalrecall(struct nfsclclient *);
145 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
146 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
147 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
148 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
149 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
150 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
151 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
152 struct ucred *, NFSPROC_T *);
153 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
154 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
155 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *,
156 bool);
157 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t);
158 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
159 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
160 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int,
161 vnode_t *);
162 static void nfscl_freeopenowner(struct nfsclowner *, int);
163 static void nfscl_cleandeleg(struct nfscldeleg *);
164 static void nfscl_emptylockowner(struct nfscllockowner *,
165 struct nfscllockownerfhhead *);
166 static void nfscl_mergeflayouts(struct nfsclflayouthead *,
167 struct nfsclflayouthead *);
168 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t,
169 uint64_t, uint32_t, uint32_t, uint32_t, char *, struct nfsclrecalllayout *);
170 static int nfscl_seq(uint32_t, uint32_t);
171 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *,
172 struct ucred *, NFSPROC_T *);
173 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *,
174 struct ucred *, NFSPROC_T *);
175
176 static short nfscberr_null[] = {
177 0,
178 0,
179 };
180
181 static short nfscberr_getattr[] = {
182 NFSERR_RESOURCE,
183 NFSERR_BADHANDLE,
184 NFSERR_BADXDR,
185 NFSERR_RESOURCE,
186 NFSERR_SERVERFAULT,
187 0,
188 };
189
190 static short nfscberr_recall[] = {
191 NFSERR_RESOURCE,
192 NFSERR_BADHANDLE,
193 NFSERR_BADSTATEID,
194 NFSERR_BADXDR,
195 NFSERR_RESOURCE,
196 NFSERR_SERVERFAULT,
197 0,
198 };
199
200 static short *nfscl_cberrmap[] = {
201 nfscberr_null,
202 nfscberr_null,
203 nfscberr_null,
204 nfscberr_getattr,
205 nfscberr_recall
206 };
207
208 #define NETFAMILY(clp) \
209 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
210
211 /*
212 * Called for an open operation.
213 * If the nfhp argument is NULL, just get an openowner.
214 */
215 int
nfscl_open(vnode_t vp,u_int8_t * nfhp,int fhlen,u_int32_t amode,int usedeleg,struct ucred * cred,NFSPROC_T * p,struct nfsclowner ** owpp,struct nfsclopen ** opp,int * newonep,int * retp,int lockit,bool firstref)216 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
217 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
218 struct nfsclopen **opp, int *newonep, int *retp, int lockit, bool firstref)
219 {
220 struct nfsclclient *clp;
221 struct nfsclowner *owp, *nowp;
222 struct nfsclopen *op = NULL, *nop = NULL;
223 struct nfscldeleg *dp;
224 struct nfsclownerhead *ohp;
225 u_int8_t own[NFSV4CL_LOCKNAMELEN];
226 int ret;
227
228 if (newonep != NULL)
229 *newonep = 0;
230 if (opp != NULL)
231 *opp = NULL;
232 if (owpp != NULL)
233 *owpp = NULL;
234
235 /*
236 * Might need one or both of these, so MALLOC them now, to
237 * avoid a tsleep() in MALLOC later.
238 */
239 nowp = malloc(sizeof (struct nfsclowner),
240 M_NFSCLOWNER, M_WAITOK);
241 if (nfhp != NULL) {
242 nop = malloc(sizeof (struct nfsclopen) +
243 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
244 nop->nfso_hash.le_prev = NULL;
245 }
246 ret = nfscl_getcl(vp->v_mount, cred, p, false, firstref, &clp);
247 if (ret != 0) {
248 free(nowp, M_NFSCLOWNER);
249 if (nop != NULL)
250 free(nop, M_NFSCLOPEN);
251 return (ret);
252 }
253
254 /*
255 * Get the Open iff it already exists.
256 * If none found, add the new one or return error, depending upon
257 * "create".
258 */
259 NFSLOCKCLSTATE();
260 dp = NULL;
261 /* First check the delegation list */
262 if (nfhp != NULL && usedeleg) {
263 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
264 if (dp->nfsdl_fhlen == fhlen &&
265 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
266 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
267 (dp->nfsdl_flags & NFSCLDL_WRITE))
268 break;
269 dp = NULL;
270 break;
271 }
272 }
273 }
274
275 /* For NFSv4.1/4.2 and this option, use a single open_owner. */
276 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
277 nfscl_filllockowner(NULL, own, F_POSIX);
278 else
279 nfscl_filllockowner(p->td_proc, own, F_POSIX);
280 if (dp != NULL)
281 ohp = &dp->nfsdl_owner;
282 else
283 ohp = &clp->nfsc_owner;
284 /* Now, search for an openowner */
285 LIST_FOREACH(owp, ohp, nfsow_list) {
286 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
287 break;
288 }
289
290 /*
291 * Create a new open, as required.
292 */
293 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
294 cred, newonep);
295
296 /*
297 * Now, check the mode on the open and return the appropriate
298 * value.
299 */
300 if (retp != NULL) {
301 if (nfhp != NULL && dp != NULL && nop == NULL)
302 /* new local open on delegation */
303 *retp = NFSCLOPEN_SETCRED;
304 else
305 *retp = NFSCLOPEN_OK;
306 }
307 if (op != NULL && (amode & ~(op->nfso_mode))) {
308 op->nfso_mode |= amode;
309 if (retp != NULL && dp == NULL)
310 *retp = NFSCLOPEN_DOOPEN;
311 }
312
313 /*
314 * Serialize modifications to the open owner for multiple threads
315 * within the same process using a read/write sleep lock.
316 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations
317 * by acquiring a shared lock. The close operations still use an
318 * exclusive lock for this case.
319 */
320 if (lockit != 0) {
321 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) {
322 /*
323 * Get a shared lock on the OpenOwner, but first
324 * wait for any pending exclusive lock, so that the
325 * exclusive locker gets priority.
326 */
327 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL,
328 NFSCLSTATEMUTEXPTR, NULL);
329 nfsv4_getref(&owp->nfsow_rwlock, NULL,
330 NFSCLSTATEMUTEXPTR, NULL);
331 } else
332 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
333 }
334 NFSUNLOCKCLSTATE();
335 if (nowp != NULL)
336 free(nowp, M_NFSCLOWNER);
337 if (nop != NULL)
338 free(nop, M_NFSCLOPEN);
339 if (owpp != NULL)
340 *owpp = owp;
341 if (opp != NULL)
342 *opp = op;
343 return (0);
344 }
345
346 /*
347 * Create a new open, as required.
348 */
349 static void
nfscl_newopen(struct nfsclclient * clp,struct nfscldeleg * dp,struct nfsclowner ** owpp,struct nfsclowner ** nowpp,struct nfsclopen ** opp,struct nfsclopen ** nopp,u_int8_t * own,u_int8_t * fhp,int fhlen,struct ucred * cred,int * newonep)350 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
351 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
352 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
353 struct ucred *cred, int *newonep)
354 {
355 struct nfsclowner *owp = *owpp, *nowp;
356 struct nfsclopen *op, *nop;
357
358 if (nowpp != NULL)
359 nowp = *nowpp;
360 else
361 nowp = NULL;
362 if (nopp != NULL)
363 nop = *nopp;
364 else
365 nop = NULL;
366 if (owp == NULL && nowp != NULL) {
367 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
368 LIST_INIT(&nowp->nfsow_open);
369 nowp->nfsow_clp = clp;
370 nowp->nfsow_seqid = 0;
371 nowp->nfsow_defunct = 0;
372 nfscl_lockinit(&nowp->nfsow_rwlock);
373 if (dp != NULL) {
374 nfsstatsv1.cllocalopenowners++;
375 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
376 } else {
377 nfsstatsv1.clopenowners++;
378 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
379 }
380 owp = *owpp = nowp;
381 *nowpp = NULL;
382 if (newonep != NULL)
383 *newonep = 1;
384 }
385
386 /* If an fhp has been specified, create an Open as well. */
387 if (fhp != NULL) {
388 /* and look for the correct open, based upon FH */
389 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
390 if (op->nfso_fhlen == fhlen &&
391 !NFSBCMP(op->nfso_fh, fhp, fhlen))
392 break;
393 }
394 if (op == NULL && nop != NULL) {
395 nop->nfso_own = owp;
396 nop->nfso_mode = 0;
397 nop->nfso_opencnt = 0;
398 nop->nfso_posixlock = 1;
399 nop->nfso_fhlen = fhlen;
400 NFSBCOPY(fhp, nop->nfso_fh, fhlen);
401 LIST_INIT(&nop->nfso_lock);
402 nop->nfso_stateid.seqid = 0;
403 nop->nfso_stateid.other[0] = 0;
404 nop->nfso_stateid.other[1] = 0;
405 nop->nfso_stateid.other[2] = 0;
406 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__));
407 newnfs_copyincred(cred, &nop->nfso_cred);
408 if (dp != NULL) {
409 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
410 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
411 nfsdl_list);
412 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
413 nfsstatsv1.cllocalopens++;
414 } else {
415 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, fhp, fhlen),
416 nop, nfso_hash);
417 nfsstatsv1.clopens++;
418 }
419 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
420 *opp = nop;
421 *nopp = NULL;
422 if (newonep != NULL)
423 *newonep = 1;
424 } else {
425 *opp = op;
426 }
427 }
428 }
429
430 /*
431 * Called to find/add a delegation to a client.
432 */
433 int
nfscl_deleg(mount_t mp,struct nfsclclient * clp,u_int8_t * nfhp,int fhlen,struct ucred * cred,NFSPROC_T * p,struct nfscldeleg ** dpp)434 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
435 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
436 {
437 struct nfscldeleg *dp = *dpp, *tdp;
438 struct nfsmount *nmp;
439
440 KASSERT(mp != NULL, ("nfscl_deleg: mp NULL"));
441 nmp = VFSTONFS(mp);
442
443 /*
444 * Since a delegation might be added to the mount,
445 * set NFSMNTP_DELEGISSUED now. If a delegation already
446 * exagain ists, setting this flag is harmless.
447 */
448 NFSLOCKMNT(nmp);
449 nmp->nm_privflag |= NFSMNTP_DELEGISSUED;
450 NFSUNLOCKMNT(nmp);
451
452 /* Look for the correct deleg, based upon FH */
453 NFSLOCKCLSTATE();
454 tdp = nfscl_finddeleg(clp, nfhp, fhlen);
455 if (tdp == NULL) {
456 if (dp == NULL) {
457 NFSUNLOCKCLSTATE();
458 return (NFSERR_BADSTATEID);
459 }
460 *dpp = NULL;
461 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
462 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
463 nfsdl_hash);
464 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
465 nfsstatsv1.cldelegates++;
466 nfscl_delegcnt++;
467 } else {
468 /*
469 * A delegation already exists. If the new one is a Write
470 * delegation and the old one a Read delegation, return the
471 * Read delegation. Otherwise, return the new delegation.
472 */
473 if (dp != NULL) {
474 if ((dp->nfsdl_flags & NFSCLDL_WRITE) != 0 &&
475 (tdp->nfsdl_flags & NFSCLDL_READ) != 0) {
476 TAILQ_REMOVE(&clp->nfsc_deleg, tdp, nfsdl_list);
477 LIST_REMOVE(tdp, nfsdl_hash);
478 *dpp = NULL;
479 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
480 nfsdl_list);
481 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp,
482 fhlen), dp, nfsdl_hash);
483 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
484 } else {
485 *dpp = NULL;
486 tdp = dp; /* Return this one. */
487 }
488 } else {
489 *dpp = tdp;
490 tdp = NULL;
491 }
492 }
493 NFSUNLOCKCLSTATE();
494 if (tdp != NULL) {
495 nfscl_trydelegreturn(tdp, cred, nmp, p);
496 free(tdp, M_NFSCLDELEG);
497 }
498 return (0);
499 }
500
501 /*
502 * Find a delegation for this file handle. Return NULL upon failure.
503 */
504 static struct nfscldeleg *
nfscl_finddeleg(struct nfsclclient * clp,u_int8_t * fhp,int fhlen)505 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
506 {
507 struct nfscldeleg *dp;
508
509 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
510 if (dp->nfsdl_fhlen == fhlen &&
511 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
512 break;
513 }
514 return (dp);
515 }
516
517 /*
518 * Get a stateid for an I/O operation. First, look for an open and iff
519 * found, return either a lockowner stateid or the open stateid.
520 * If no Open is found, just return error and the special stateid of all zeros.
521 */
522 int
nfscl_getstateid(vnode_t vp,u_int8_t * nfhp,int fhlen,u_int32_t mode,int fords,struct ucred * cred,NFSPROC_T * p,nfsv4stateid_t * stateidp,void ** lckpp)523 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
524 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
525 void **lckpp)
526 {
527 struct nfsclclient *clp;
528 struct nfsclopen *op = NULL, *top;
529 struct nfsclopenhash *oph;
530 struct nfscllockowner *lp;
531 struct nfscldeleg *dp;
532 struct nfsnode *np;
533 struct nfsmount *nmp;
534 struct nfscred ncr;
535 u_int8_t own[NFSV4CL_LOCKNAMELEN], lockown[NFSV4CL_LOCKNAMELEN];
536 int error;
537 bool done;
538
539 *lckpp = NULL;
540 /*
541 * Initially, just set the special stateid of all zeros.
542 * (Don't do this for a DS, since the special stateid can't be used.)
543 */
544 if (fords == 0) {
545 stateidp->seqid = 0;
546 stateidp->other[0] = 0;
547 stateidp->other[1] = 0;
548 stateidp->other[2] = 0;
549 }
550 if (vp->v_type != VREG)
551 return (EISDIR);
552 np = VTONFS(vp);
553 nmp = VFSTONFS(vp->v_mount);
554
555 /*
556 * For "oneopenown" mounts, first check for a cached open in the
557 * NFS vnode, that can be used as a stateid. This can only be
558 * done if no delegations have been issued to the mount and no
559 * byte range file locking has been done for the file.
560 */
561 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && fords == 0) {
562 NFSLOCKMNT(nmp);
563 NFSLOCKNODE(np);
564 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 &&
565 (np->n_flag & NMIGHTBELOCKED) == 0 &&
566 np->n_openstateid != NULL) {
567 stateidp->seqid = 0;
568 stateidp->other[0] =
569 np->n_openstateid->nfso_stateid.other[0];
570 stateidp->other[1] =
571 np->n_openstateid->nfso_stateid.other[1];
572 stateidp->other[2] =
573 np->n_openstateid->nfso_stateid.other[2];
574 NFSUNLOCKNODE(np);
575 NFSUNLOCKMNT(nmp);
576 return (0);
577 }
578 NFSUNLOCKNODE(np);
579 NFSUNLOCKMNT(nmp);
580 }
581
582 NFSLOCKCLSTATE();
583 clp = nfscl_findcl(nmp);
584 if (clp == NULL) {
585 NFSUNLOCKCLSTATE();
586 return (EACCES);
587 }
588
589 /*
590 * Wait for recovery to complete.
591 */
592 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
593 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
594 PZERO, "nfsrecvr", NULL);
595
596 /*
597 * First, look for a delegation.
598 */
599 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
600 if (dp->nfsdl_fhlen == fhlen &&
601 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
602 if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
603 (dp->nfsdl_flags & NFSCLDL_WRITE)) {
604 if (NFSHASNFSV4N(nmp))
605 stateidp->seqid = 0;
606 else
607 stateidp->seqid =
608 dp->nfsdl_stateid.seqid;
609 stateidp->other[0] = dp->nfsdl_stateid.other[0];
610 stateidp->other[1] = dp->nfsdl_stateid.other[1];
611 stateidp->other[2] = dp->nfsdl_stateid.other[2];
612 if (!(np->n_flag & NDELEGRECALL)) {
613 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
614 nfsdl_list);
615 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
616 nfsdl_list);
617 dp->nfsdl_timestamp = NFSD_MONOSEC +
618 120;
619 dp->nfsdl_rwlock.nfslock_usecnt++;
620 *lckpp = (void *)&dp->nfsdl_rwlock;
621 }
622 NFSUNLOCKCLSTATE();
623 return (0);
624 }
625 break;
626 }
627 }
628
629 if (p != NULL) {
630 /*
631 * If p != NULL, we want to search the parentage tree
632 * for a matching OpenOwner and use that.
633 */
634 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
635 nfscl_filllockowner(NULL, own, F_POSIX);
636 else
637 nfscl_filllockowner(p->td_proc, own, F_POSIX);
638 nfscl_filllockowner(p->td_proc, lockown, F_POSIX);
639 lp = NULL;
640 error = nfscl_getopen(NULL, clp->nfsc_openhash, nfhp, fhlen,
641 own, lockown, mode, &lp, &op);
642 if (error == 0 && lp != NULL && fords == 0) {
643 /* Don't return a lock stateid for a DS. */
644 if (NFSHASNFSV4N(nmp))
645 stateidp->seqid = 0;
646 else
647 stateidp->seqid = lp->nfsl_stateid.seqid;
648 stateidp->other[0] =
649 lp->nfsl_stateid.other[0];
650 stateidp->other[1] =
651 lp->nfsl_stateid.other[1];
652 stateidp->other[2] =
653 lp->nfsl_stateid.other[2];
654 NFSUNLOCKCLSTATE();
655 return (0);
656 }
657 }
658 if (op == NULL) {
659 /* If not found, just look for any OpenOwner that will work. */
660 top = NULL;
661 done = false;
662 oph = NFSCLOPENHASH(clp, nfhp, fhlen);
663 LIST_FOREACH(op, oph, nfso_hash) {
664 if (op->nfso_fhlen == fhlen &&
665 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) {
666 if (top == NULL && (op->nfso_mode &
667 NFSV4OPEN_ACCESSWRITE) != 0 &&
668 (mode & NFSV4OPEN_ACCESSREAD) != 0)
669 top = op;
670 if ((mode & op->nfso_mode) == mode) {
671 /* LRU order the hash list. */
672 LIST_REMOVE(op, nfso_hash);
673 LIST_INSERT_HEAD(oph, op, nfso_hash);
674 done = true;
675 break;
676 }
677 }
678 }
679 if (!done) {
680 NFSCL_DEBUG(2, "openmode top=%p\n", top);
681 if (top == NULL || NFSHASOPENMODE(nmp)) {
682 NFSUNLOCKCLSTATE();
683 return (ENOENT);
684 } else
685 op = top;
686 }
687 /*
688 * For read aheads or write behinds, use the open cred.
689 * A read ahead or write behind is indicated by p == NULL.
690 */
691 if (p == NULL)
692 memcpy(&ncr, &op->nfso_cred, sizeof(ncr));
693 }
694
695 /*
696 * No lock stateid, so return the open stateid.
697 */
698 if (NFSHASNFSV4N(nmp))
699 stateidp->seqid = 0;
700 else
701 stateidp->seqid = op->nfso_stateid.seqid;
702 stateidp->other[0] = op->nfso_stateid.other[0];
703 stateidp->other[1] = op->nfso_stateid.other[1];
704 stateidp->other[2] = op->nfso_stateid.other[2];
705 NFSUNLOCKCLSTATE();
706 if (p == NULL)
707 newnfs_copycred(&ncr, cred);
708 return (0);
709 }
710
711 /*
712 * Search for a matching file, mode and, optionally, lockowner.
713 */
714 static int
nfscl_getopen(struct nfsclownerhead * ohp,struct nfsclopenhash * ohashp,u_int8_t * nfhp,int fhlen,u_int8_t * openown,u_int8_t * lockown,u_int32_t mode,struct nfscllockowner ** lpp,struct nfsclopen ** opp)715 nfscl_getopen(struct nfsclownerhead *ohp, struct nfsclopenhash *ohashp,
716 u_int8_t *nfhp, int fhlen, u_int8_t *openown, u_int8_t *lockown,
717 u_int32_t mode, struct nfscllockowner **lpp, struct nfsclopen **opp)
718 {
719 struct nfsclowner *owp;
720 struct nfsclopen *op, *rop, *rop2;
721 struct nfsclopenhash *oph;
722 bool keep_looping;
723
724 KASSERT(ohp == NULL || ohashp == NULL, ("nfscl_getopen: "
725 "only one of ohp and ohashp can be set"));
726 if (lpp != NULL)
727 *lpp = NULL;
728 /*
729 * rop will be set to the open to be returned. There are three
730 * variants of this, all for an open of the correct file:
731 * 1 - A match of lockown.
732 * 2 - A match of the openown, when no lockown match exists.
733 * 3 - A match for any open, if no openown or lockown match exists.
734 * Looking for #2 over #3 probably isn't necessary, but since
735 * RFC3530 is vague w.r.t. the relationship between openowners and
736 * lockowners, I think this is the safer way to go.
737 */
738 rop = NULL;
739 rop2 = NULL;
740 keep_looping = true;
741 /* Search the client list */
742 if (ohashp == NULL) {
743 /* Search the local opens on the delegation. */
744 LIST_FOREACH(owp, ohp, nfsow_list) {
745 /* and look for the correct open */
746 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
747 if (op->nfso_fhlen == fhlen &&
748 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
749 && (op->nfso_mode & mode) == mode)
750 keep_looping = nfscl_checkown(owp, op, openown,
751 lockown, lpp, &rop, &rop2);
752 if (!keep_looping)
753 break;
754 }
755 if (!keep_looping)
756 break;
757 }
758 } else {
759 /* Search for matching opens on the hash list. */
760 oph = &ohashp[NFSCLOPENHASHFUNC(nfhp, fhlen)];
761 LIST_FOREACH(op, oph, nfso_hash) {
762 if (op->nfso_fhlen == fhlen &&
763 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
764 && (op->nfso_mode & mode) == mode)
765 keep_looping = nfscl_checkown(op->nfso_own, op,
766 openown, lockown, lpp, &rop, &rop2);
767 if (!keep_looping) {
768 /* LRU order the hash list. */
769 LIST_REMOVE(op, nfso_hash);
770 LIST_INSERT_HEAD(oph, op, nfso_hash);
771 break;
772 }
773 }
774 }
775 if (rop == NULL)
776 rop = rop2;
777 if (rop == NULL)
778 return (EBADF);
779 *opp = rop;
780 return (0);
781 }
782
783 /* Check for an owner match. */
784 static bool
nfscl_checkown(struct nfsclowner * owp,struct nfsclopen * op,uint8_t * openown,uint8_t * lockown,struct nfscllockowner ** lpp,struct nfsclopen ** ropp,struct nfsclopen ** ropp2)785 nfscl_checkown(struct nfsclowner *owp, struct nfsclopen *op, uint8_t *openown,
786 uint8_t *lockown, struct nfscllockowner **lpp, struct nfsclopen **ropp,
787 struct nfsclopen **ropp2)
788 {
789 struct nfscllockowner *lp;
790 bool keep_looping;
791
792 keep_looping = true;
793 if (lpp != NULL) {
794 /* Now look for a matching lockowner. */
795 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
796 if (!NFSBCMP(lp->nfsl_owner, lockown,
797 NFSV4CL_LOCKNAMELEN)) {
798 *lpp = lp;
799 *ropp = op;
800 return (false);
801 }
802 }
803 }
804 if (*ropp == NULL && !NFSBCMP(owp->nfsow_owner, openown,
805 NFSV4CL_LOCKNAMELEN)) {
806 *ropp = op;
807 if (lpp == NULL)
808 keep_looping = false;
809 }
810 if (*ropp2 == NULL)
811 *ropp2 = op;
812 return (keep_looping);
813 }
814
815 /*
816 * Release use of an open owner. Called when open operations are done
817 * with the open owner.
818 */
819 void
nfscl_ownerrelease(struct nfsmount * nmp,struct nfsclowner * owp,__unused int error,__unused int candelete,int unlocked)820 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp,
821 __unused int error, __unused int candelete, int unlocked)
822 {
823
824 if (owp == NULL)
825 return;
826 NFSLOCKCLSTATE();
827 if (unlocked == 0) {
828 if (NFSHASONEOPENOWN(nmp))
829 nfsv4_relref(&owp->nfsow_rwlock);
830 else
831 nfscl_lockunlock(&owp->nfsow_rwlock);
832 }
833 nfscl_clrelease(owp->nfsow_clp);
834 NFSUNLOCKCLSTATE();
835 }
836
837 /*
838 * Release use of an open structure under an open owner.
839 */
840 void
nfscl_openrelease(struct nfsmount * nmp,struct nfsclopen * op,int error,int candelete)841 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error,
842 int candelete)
843 {
844 struct nfsclclient *clp;
845 struct nfsclowner *owp;
846
847 if (op == NULL)
848 return;
849 NFSLOCKCLSTATE();
850 owp = op->nfso_own;
851 if (NFSHASONEOPENOWN(nmp))
852 nfsv4_relref(&owp->nfsow_rwlock);
853 else
854 nfscl_lockunlock(&owp->nfsow_rwlock);
855 clp = owp->nfsow_clp;
856 if (error && candelete && op->nfso_opencnt == 0)
857 nfscl_freeopen(op, 0, true);
858 nfscl_clrelease(clp);
859 NFSUNLOCKCLSTATE();
860 }
861
862 /*
863 * Called to get a clientid structure. It will optionally lock the
864 * client data structures to do the SetClientId/SetClientId_confirm,
865 * but will release that lock and return the clientid with a reference
866 * count on it.
867 * If the "cred" argument is NULL, a new clientid should not be created.
868 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
869 * be done.
870 * It always clpp with a reference count on it, unless returning an error.
871 */
872 int
nfscl_getcl(struct mount * mp,struct ucred * cred,NFSPROC_T * p,bool tryminvers,bool firstref,struct nfsclclient ** clpp)873 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p,
874 bool tryminvers, bool firstref, struct nfsclclient **clpp)
875 {
876 struct nfsclclient *clp;
877 struct nfsclclient *newclp = NULL;
878 struct nfsmount *nmp;
879 char uuid[HOSTUUIDLEN];
880 int igotlock = 0, error, trystalecnt, clidinusedelay, i;
881 u_int16_t idlen = 0;
882
883 nmp = VFSTONFS(mp);
884 if (cred != NULL) {
885 getcredhostuuid(cred, uuid, sizeof uuid);
886 idlen = strlen(uuid);
887 if (idlen > 0)
888 idlen += sizeof (u_int64_t);
889 else
890 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
891 newclp = malloc(
892 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
893 M_WAITOK | M_ZERO);
894 }
895 NFSLOCKCLSTATE();
896 /*
897 * If a forced dismount is already in progress, don't
898 * allocate a new clientid and get out now. For the case where
899 * clp != NULL, this is a harmless optimization.
900 */
901 if (NFSCL_FORCEDISM(mp)) {
902 NFSUNLOCKCLSTATE();
903 if (newclp != NULL)
904 free(newclp, M_NFSCLCLIENT);
905 return (EBADF);
906 }
907 clp = nmp->nm_clp;
908 if (clp == NULL) {
909 if (newclp == NULL) {
910 NFSUNLOCKCLSTATE();
911 return (EACCES);
912 }
913 clp = newclp;
914 clp->nfsc_idlen = idlen;
915 LIST_INIT(&clp->nfsc_owner);
916 TAILQ_INIT(&clp->nfsc_deleg);
917 TAILQ_INIT(&clp->nfsc_layout);
918 LIST_INIT(&clp->nfsc_devinfo);
919 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
920 LIST_INIT(&clp->nfsc_deleghash[i]);
921 for (i = 0; i < NFSCLOPENHASHSIZE; i++)
922 LIST_INIT(&clp->nfsc_openhash[i]);
923 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
924 LIST_INIT(&clp->nfsc_layouthash[i]);
925 clp->nfsc_flags = NFSCLFLAGS_INITED;
926 clp->nfsc_clientidrev = 1;
927 clp->nfsc_cbident = nfscl_nextcbident();
928 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
929 clp->nfsc_idlen);
930 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
931 nmp->nm_clp = clp;
932 clp->nfsc_nmp = nmp;
933 } else {
934 if (newclp != NULL)
935 free(newclp, M_NFSCLCLIENT);
936 }
937 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
938 !NFSCL_FORCEDISM(mp))
939 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
940 NFSCLSTATEMUTEXPTR, mp);
941 if (igotlock == 0) {
942 /*
943 * Call nfsv4_lock() with "iwantlock == 0" on the firstref so
944 * that it will wait for a pending exclusive lock request.
945 * This gives the exclusive lock request priority over this
946 * shared lock request.
947 * An exclusive lock on nfsc_lock is used mainly for server
948 * crash recoveries and delegation recalls.
949 */
950 if (firstref)
951 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR,
952 mp);
953 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
954 }
955 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) {
956 /*
957 * Both nfsv4_lock() and nfsv4_getref() know to check
958 * for NFSCL_FORCEDISM() and return without sleeping to
959 * wait for the exclusive lock to be released, since it
960 * might be held by nfscl_umount() and we need to get out
961 * now for that case and not wait until nfscl_umount()
962 * releases it.
963 */
964 NFSUNLOCKCLSTATE();
965 return (EBADF);
966 }
967 NFSUNLOCKCLSTATE();
968
969 /*
970 * If it needs a clientid, do the setclientid now.
971 */
972 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
973 if (!igotlock)
974 panic("nfscl_clget");
975 if (p == NULL || cred == NULL) {
976 NFSLOCKCLSTATE();
977 nfsv4_unlock(&clp->nfsc_lock, 0);
978 NFSUNLOCKCLSTATE();
979 return (EACCES);
980 }
981 /*
982 * If RFC3530 Sec. 14.2.33 is taken literally,
983 * NFSERR_CLIDINUSE will be returned persistently for the
984 * case where a new mount of the same file system is using
985 * a different principal. In practice, NFSERR_CLIDINUSE is
986 * only returned when there is outstanding unexpired state
987 * on the clientid. As such, try for twice the lease
988 * interval, if we know what that is. Otherwise, make a
989 * wild ass guess.
990 * The case of returning NFSERR_STALECLIENTID is far less
991 * likely, but might occur if there is a significant delay
992 * between doing the SetClientID and SetClientIDConfirm Ops,
993 * such that the server throws away the clientid before
994 * receiving the SetClientIDConfirm.
995 */
996 if (clp->nfsc_renew > 0)
997 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
998 else
999 clidinusedelay = 120;
1000 trystalecnt = 3;
1001 do {
1002 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
1003 if (error == NFSERR_STALECLIENTID ||
1004 error == NFSERR_STALEDONTRECOVER ||
1005 error == NFSERR_BADSESSION ||
1006 error == NFSERR_CLIDINUSE) {
1007 (void) nfs_catnap(PZERO, error, "nfs_setcl");
1008 } else if (error == NFSERR_MINORVERMISMATCH &&
1009 tryminvers) {
1010 if (nmp->nm_minorvers > 0)
1011 nmp->nm_minorvers--;
1012 else
1013 tryminvers = false;
1014 }
1015 } while (((error == NFSERR_STALECLIENTID ||
1016 error == NFSERR_BADSESSION ||
1017 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
1018 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0) ||
1019 (error == NFSERR_MINORVERMISMATCH && tryminvers));
1020 if (error) {
1021 NFSLOCKCLSTATE();
1022 nfsv4_unlock(&clp->nfsc_lock, 0);
1023 NFSUNLOCKCLSTATE();
1024 return (error);
1025 }
1026 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
1027 }
1028 if (igotlock) {
1029 NFSLOCKCLSTATE();
1030 nfsv4_unlock(&clp->nfsc_lock, 1);
1031 NFSUNLOCKCLSTATE();
1032 }
1033
1034 *clpp = clp;
1035 return (0);
1036 }
1037
1038 /*
1039 * Get a reference to a clientid and return it, if valid.
1040 */
1041 struct nfsclclient *
nfscl_findcl(struct nfsmount * nmp)1042 nfscl_findcl(struct nfsmount *nmp)
1043 {
1044 struct nfsclclient *clp;
1045
1046 clp = nmp->nm_clp;
1047 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
1048 return (NULL);
1049 return (clp);
1050 }
1051
1052 /*
1053 * Release the clientid structure. It may be locked or reference counted.
1054 */
1055 static void
nfscl_clrelease(struct nfsclclient * clp)1056 nfscl_clrelease(struct nfsclclient *clp)
1057 {
1058
1059 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
1060 nfsv4_unlock(&clp->nfsc_lock, 0);
1061 else
1062 nfsv4_relref(&clp->nfsc_lock);
1063 }
1064
1065 /*
1066 * External call for nfscl_clrelease.
1067 */
1068 void
nfscl_clientrelease(struct nfsclclient * clp)1069 nfscl_clientrelease(struct nfsclclient *clp)
1070 {
1071
1072 NFSLOCKCLSTATE();
1073 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
1074 nfsv4_unlock(&clp->nfsc_lock, 0);
1075 else
1076 nfsv4_relref(&clp->nfsc_lock);
1077 NFSUNLOCKCLSTATE();
1078 }
1079
1080 /*
1081 * Called when wanting to lock a byte region.
1082 */
1083 int
nfscl_getbytelock(vnode_t vp,u_int64_t off,u_int64_t len,short type,struct ucred * cred,NFSPROC_T * p,struct nfsclclient * rclp,int recovery,void * id,int flags,u_int8_t * rownp,u_int8_t * ropenownp,struct nfscllockowner ** lpp,int * newonep,int * donelocallyp)1084 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1085 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
1086 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
1087 struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
1088 {
1089 struct nfscllockowner *lp;
1090 struct nfsclopen *op;
1091 struct nfsclclient *clp;
1092 struct nfscllockowner *nlp;
1093 struct nfscllock *nlop, *otherlop;
1094 struct nfscldeleg *dp = NULL, *ldp = NULL;
1095 struct nfscllockownerhead *lhp = NULL;
1096 struct nfsnode *np;
1097 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
1098 u_int8_t *openownp;
1099 int error = 0, ret, donelocally = 0;
1100 u_int32_t mode;
1101
1102 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
1103 mode = 0;
1104 np = VTONFS(vp);
1105 *lpp = NULL;
1106 lp = NULL;
1107 *newonep = 0;
1108 *donelocallyp = 0;
1109
1110 /*
1111 * Might need these, so MALLOC them now, to
1112 * avoid a tsleep() in MALLOC later.
1113 */
1114 nlp = malloc(
1115 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
1116 otherlop = malloc(
1117 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1118 nlop = malloc(
1119 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1120 nlop->nfslo_type = type;
1121 nlop->nfslo_first = off;
1122 if (len == NFS64BITSSET) {
1123 nlop->nfslo_end = NFS64BITSSET;
1124 } else {
1125 nlop->nfslo_end = off + len;
1126 if (nlop->nfslo_end <= nlop->nfslo_first)
1127 error = NFSERR_INVAL;
1128 }
1129
1130 if (!error) {
1131 if (recovery)
1132 clp = rclp;
1133 else
1134 error = nfscl_getcl(vp->v_mount, cred, p, false, true,
1135 &clp);
1136 }
1137 if (error) {
1138 free(nlp, M_NFSCLLOCKOWNER);
1139 free(otherlop, M_NFSCLLOCK);
1140 free(nlop, M_NFSCLLOCK);
1141 return (error);
1142 }
1143
1144 op = NULL;
1145 if (recovery) {
1146 ownp = rownp;
1147 openownp = ropenownp;
1148 } else {
1149 nfscl_filllockowner(id, own, flags);
1150 ownp = own;
1151 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
1152 nfscl_filllockowner(NULL, openown, F_POSIX);
1153 else
1154 nfscl_filllockowner(p->td_proc, openown, F_POSIX);
1155 openownp = openown;
1156 }
1157 if (!recovery) {
1158 NFSLOCKCLSTATE();
1159 /*
1160 * First, search for a delegation. If one exists for this file,
1161 * the lock can be done locally against it, so long as there
1162 * isn't a local lock conflict.
1163 */
1164 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1165 np->n_fhp->nfh_len);
1166 /* Just sanity check for correct type of delegation */
1167 if (dp != NULL && ((dp->nfsdl_flags &
1168 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
1169 (type == F_WRLCK &&
1170 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
1171 dp = NULL;
1172 }
1173 if (dp != NULL) {
1174 /* Now, find an open and maybe a lockowner. */
1175 ret = nfscl_getopen(&dp->nfsdl_owner, NULL, np->n_fhp->nfh_fh,
1176 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
1177 if (ret)
1178 ret = nfscl_getopen(NULL, clp->nfsc_openhash,
1179 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1180 ownp, mode, NULL, &op);
1181 if (!ret) {
1182 lhp = &dp->nfsdl_lock;
1183 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
1184 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
1185 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
1186 donelocally = 1;
1187 } else {
1188 dp = NULL;
1189 }
1190 }
1191 if (!donelocally) {
1192 /*
1193 * Get the related Open and maybe lockowner.
1194 */
1195 error = nfscl_getopen(NULL, clp->nfsc_openhash,
1196 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1197 ownp, mode, &lp, &op);
1198 if (!error)
1199 lhp = &op->nfso_lock;
1200 }
1201 if (!error && !recovery)
1202 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1203 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1204 if (error) {
1205 if (!recovery) {
1206 nfscl_clrelease(clp);
1207 NFSUNLOCKCLSTATE();
1208 }
1209 free(nlp, M_NFSCLLOCKOWNER);
1210 free(otherlop, M_NFSCLLOCK);
1211 free(nlop, M_NFSCLLOCK);
1212 return (error);
1213 }
1214
1215 /*
1216 * Ok, see if a lockowner exists and create one, as required.
1217 */
1218 if (lp == NULL)
1219 LIST_FOREACH(lp, lhp, nfsl_list) {
1220 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1221 break;
1222 }
1223 if (lp == NULL) {
1224 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1225 if (recovery)
1226 NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1227 NFSV4CL_LOCKNAMELEN);
1228 else
1229 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1230 NFSV4CL_LOCKNAMELEN);
1231 nlp->nfsl_seqid = 0;
1232 nlp->nfsl_lockflags = flags;
1233 nlp->nfsl_inprog = NULL;
1234 nfscl_lockinit(&nlp->nfsl_rwlock);
1235 LIST_INIT(&nlp->nfsl_lock);
1236 if (donelocally) {
1237 nlp->nfsl_open = NULL;
1238 nfsstatsv1.cllocallockowners++;
1239 } else {
1240 nlp->nfsl_open = op;
1241 nfsstatsv1.cllockowners++;
1242 }
1243 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1244 lp = nlp;
1245 nlp = NULL;
1246 *newonep = 1;
1247 }
1248
1249 /*
1250 * Now, update the byte ranges for locks.
1251 */
1252 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1253 if (!ret)
1254 donelocally = 1;
1255 if (donelocally) {
1256 *donelocallyp = 1;
1257 if (!recovery)
1258 nfscl_clrelease(clp);
1259 } else {
1260 /*
1261 * Serial modifications on the lock owner for multiple threads
1262 * for the same process using a read/write lock.
1263 */
1264 if (!recovery)
1265 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1266 }
1267 if (!recovery)
1268 NFSUNLOCKCLSTATE();
1269
1270 if (nlp)
1271 free(nlp, M_NFSCLLOCKOWNER);
1272 if (nlop)
1273 free(nlop, M_NFSCLLOCK);
1274 if (otherlop)
1275 free(otherlop, M_NFSCLLOCK);
1276
1277 *lpp = lp;
1278 return (0);
1279 }
1280
1281 /*
1282 * Called to unlock a byte range, for LockU.
1283 */
1284 int
nfscl_relbytelock(vnode_t vp,u_int64_t off,u_int64_t len,__unused struct ucred * cred,NFSPROC_T * p,int callcnt,struct nfsclclient * clp,void * id,int flags,struct nfscllockowner ** lpp,int * dorpcp)1285 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1286 __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1287 struct nfsclclient *clp, void *id, int flags,
1288 struct nfscllockowner **lpp, int *dorpcp)
1289 {
1290 struct nfscllockowner *lp;
1291 struct nfsclopen *op;
1292 struct nfscllock *nlop, *other_lop = NULL;
1293 struct nfscldeleg *dp;
1294 struct nfsnode *np;
1295 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1296 int ret = 0, fnd;
1297
1298 np = VTONFS(vp);
1299 *lpp = NULL;
1300 *dorpcp = 0;
1301
1302 /*
1303 * Might need these, so MALLOC them now, to
1304 * avoid a tsleep() in MALLOC later.
1305 */
1306 nlop = malloc(
1307 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1308 nlop->nfslo_type = F_UNLCK;
1309 nlop->nfslo_first = off;
1310 if (len == NFS64BITSSET) {
1311 nlop->nfslo_end = NFS64BITSSET;
1312 } else {
1313 nlop->nfslo_end = off + len;
1314 if (nlop->nfslo_end <= nlop->nfslo_first) {
1315 free(nlop, M_NFSCLLOCK);
1316 return (NFSERR_INVAL);
1317 }
1318 }
1319 if (callcnt == 0) {
1320 other_lop = malloc(
1321 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1322 *other_lop = *nlop;
1323 }
1324 nfscl_filllockowner(id, own, flags);
1325 dp = NULL;
1326 NFSLOCKCLSTATE();
1327 if (callcnt == 0)
1328 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1329 np->n_fhp->nfh_len);
1330
1331 /*
1332 * First, unlock any local regions on a delegation.
1333 */
1334 if (dp != NULL) {
1335 /* Look for this lockowner. */
1336 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1337 if (!NFSBCMP(lp->nfsl_owner, own,
1338 NFSV4CL_LOCKNAMELEN))
1339 break;
1340 }
1341 if (lp != NULL)
1342 /* Use other_lop, so nlop is still available */
1343 (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1344 }
1345
1346 /*
1347 * Now, find a matching open/lockowner that hasn't already been done,
1348 * as marked by nfsl_inprog.
1349 */
1350 lp = NULL;
1351 fnd = 0;
1352 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1353 np->n_fhp->nfh_len), nfso_hash) {
1354 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1355 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1356 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1357 if (lp->nfsl_inprog == NULL &&
1358 !NFSBCMP(lp->nfsl_owner, own,
1359 NFSV4CL_LOCKNAMELEN)) {
1360 fnd = 1;
1361 break;
1362 }
1363 }
1364 }
1365 if (fnd)
1366 break;
1367 }
1368
1369 if (lp != NULL) {
1370 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1371 if (ret)
1372 *dorpcp = 1;
1373 /*
1374 * Serial modifications on the lock owner for multiple
1375 * threads for the same process using a read/write lock.
1376 */
1377 lp->nfsl_inprog = p;
1378 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1379 *lpp = lp;
1380 }
1381 NFSUNLOCKCLSTATE();
1382 if (nlop)
1383 free(nlop, M_NFSCLLOCK);
1384 if (other_lop)
1385 free(other_lop, M_NFSCLLOCK);
1386 return (0);
1387 }
1388
1389 /*
1390 * Release all lockowners marked in progess for this process and file.
1391 */
1392 void
nfscl_releasealllocks(struct nfsclclient * clp,vnode_t vp,NFSPROC_T * p,void * id,int flags)1393 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1394 void *id, int flags)
1395 {
1396 struct nfsclopen *op;
1397 struct nfscllockowner *lp;
1398 struct nfsnode *np;
1399 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1400
1401 np = VTONFS(vp);
1402 nfscl_filllockowner(id, own, flags);
1403 NFSLOCKCLSTATE();
1404 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1405 np->n_fhp->nfh_len), nfso_hash) {
1406 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1407 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1408 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1409 if (lp->nfsl_inprog == p &&
1410 !NFSBCMP(lp->nfsl_owner, own,
1411 NFSV4CL_LOCKNAMELEN)) {
1412 lp->nfsl_inprog = NULL;
1413 nfscl_lockunlock(&lp->nfsl_rwlock);
1414 }
1415 }
1416 }
1417 }
1418 nfscl_clrelease(clp);
1419 NFSUNLOCKCLSTATE();
1420 }
1421
1422 /*
1423 * Called to find out if any bytes within the byte range specified are
1424 * write locked by the calling process. Used to determine if flushing
1425 * is required before a LockU.
1426 * If in doubt, return 1, so the flush will occur.
1427 */
1428 int
nfscl_checkwritelocked(vnode_t vp,struct flock * fl,struct ucred * cred,NFSPROC_T * p,void * id,int flags)1429 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1430 struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1431 {
1432 struct nfscllockowner *lp;
1433 struct nfsclopen *op;
1434 struct nfsclclient *clp;
1435 struct nfscllock *lop;
1436 struct nfscldeleg *dp;
1437 struct nfsnode *np;
1438 u_int64_t off, end;
1439 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1440 int error = 0;
1441
1442 np = VTONFS(vp);
1443 switch (fl->l_whence) {
1444 case SEEK_SET:
1445 case SEEK_CUR:
1446 /*
1447 * Caller is responsible for adding any necessary offset
1448 * when SEEK_CUR is used.
1449 */
1450 off = fl->l_start;
1451 break;
1452 case SEEK_END:
1453 off = np->n_size + fl->l_start;
1454 break;
1455 default:
1456 return (1);
1457 }
1458 if (fl->l_len != 0) {
1459 end = off + fl->l_len;
1460 if (end < off)
1461 return (1);
1462 } else {
1463 end = NFS64BITSSET;
1464 }
1465
1466 error = nfscl_getcl(vp->v_mount, cred, p, false, true, &clp);
1467 if (error)
1468 return (1);
1469 nfscl_filllockowner(id, own, flags);
1470 NFSLOCKCLSTATE();
1471
1472 /*
1473 * First check the delegation locks.
1474 */
1475 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1476 if (dp != NULL) {
1477 /* No need to flush if it is a write delegation. */
1478 if ((dp->nfsdl_flags & NFSCLDL_WRITE) != 0) {
1479 nfscl_clrelease(clp);
1480 NFSUNLOCKCLSTATE();
1481 return (0);
1482 }
1483 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1484 if (!NFSBCMP(lp->nfsl_owner, own,
1485 NFSV4CL_LOCKNAMELEN))
1486 break;
1487 }
1488 if (lp != NULL) {
1489 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1490 if (lop->nfslo_first >= end)
1491 break;
1492 if (lop->nfslo_end <= off)
1493 continue;
1494 if (lop->nfslo_type == F_WRLCK) {
1495 nfscl_clrelease(clp);
1496 NFSUNLOCKCLSTATE();
1497 return (1);
1498 }
1499 }
1500 }
1501 }
1502
1503 /*
1504 * Now, check state against the server.
1505 */
1506 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
1507 np->n_fhp->nfh_len), nfso_hash) {
1508 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1509 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1510 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1511 if (!NFSBCMP(lp->nfsl_owner, own,
1512 NFSV4CL_LOCKNAMELEN))
1513 break;
1514 }
1515 if (lp != NULL) {
1516 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1517 if (lop->nfslo_first >= end)
1518 break;
1519 if (lop->nfslo_end <= off)
1520 continue;
1521 if (lop->nfslo_type == F_WRLCK) {
1522 nfscl_clrelease(clp);
1523 NFSUNLOCKCLSTATE();
1524 return (1);
1525 }
1526 }
1527 }
1528 }
1529 }
1530 nfscl_clrelease(clp);
1531 NFSUNLOCKCLSTATE();
1532 return (0);
1533 }
1534
1535 /*
1536 * Release a byte range lock owner structure.
1537 */
1538 void
nfscl_lockrelease(struct nfscllockowner * lp,int error,int candelete)1539 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1540 {
1541 struct nfsclclient *clp;
1542
1543 if (lp == NULL)
1544 return;
1545 NFSLOCKCLSTATE();
1546 clp = lp->nfsl_open->nfso_own->nfsow_clp;
1547 if (error != 0 && candelete &&
1548 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1549 nfscl_freelockowner(lp, 0);
1550 else
1551 nfscl_lockunlock(&lp->nfsl_rwlock);
1552 nfscl_clrelease(clp);
1553 NFSUNLOCKCLSTATE();
1554 }
1555
1556 /*
1557 * Unlink the open structure.
1558 */
1559 static void
nfscl_unlinkopen(struct nfsclopen * op)1560 nfscl_unlinkopen(struct nfsclopen *op)
1561 {
1562
1563 LIST_REMOVE(op, nfso_list);
1564 if (op->nfso_hash.le_prev != NULL)
1565 LIST_REMOVE(op, nfso_hash);
1566 }
1567
1568 /*
1569 * Free up an open structure and any associated byte range lock structures.
1570 */
1571 void
nfscl_freeopen(struct nfsclopen * op,int local,bool unlink)1572 nfscl_freeopen(struct nfsclopen *op, int local, bool unlink)
1573 {
1574
1575 if (unlink)
1576 nfscl_unlinkopen(op);
1577 nfscl_freealllocks(&op->nfso_lock, local);
1578 free(op, M_NFSCLOPEN);
1579 if (local)
1580 nfsstatsv1.cllocalopens--;
1581 else
1582 nfsstatsv1.clopens--;
1583 }
1584
1585 /*
1586 * Free up all lock owners and associated locks.
1587 */
1588 static void
nfscl_freealllocks(struct nfscllockownerhead * lhp,int local)1589 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1590 {
1591 struct nfscllockowner *lp, *nlp;
1592
1593 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1594 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1595 panic("nfscllckw");
1596 nfscl_freelockowner(lp, local);
1597 }
1598 }
1599
1600 /*
1601 * Called for an Open when NFSERR_EXPIRED is received from the server.
1602 * If there are no byte range locks nor a Share Deny lost, try to do a
1603 * fresh Open. Otherwise, free the open.
1604 */
1605 static int
nfscl_expireopen(struct nfsclclient * clp,struct nfsclopen * op,struct nfsmount * nmp,struct ucred * cred,NFSPROC_T * p)1606 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1607 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1608 {
1609 struct nfscllockowner *lp;
1610 struct nfscldeleg *dp;
1611 int mustdelete = 0, error;
1612
1613 /*
1614 * Look for any byte range lock(s).
1615 */
1616 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1617 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1618 mustdelete = 1;
1619 break;
1620 }
1621 }
1622
1623 /*
1624 * If no byte range lock(s) nor a Share deny, try to re-open.
1625 */
1626 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1627 newnfs_copycred(&op->nfso_cred, cred);
1628 dp = NULL;
1629 error = nfsrpc_reopen(nmp, op->nfso_fh,
1630 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1631 if (error) {
1632 mustdelete = 1;
1633 if (dp != NULL) {
1634 free(dp, M_NFSCLDELEG);
1635 dp = NULL;
1636 }
1637 }
1638 if (dp != NULL)
1639 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1640 op->nfso_fhlen, cred, p, &dp);
1641 }
1642
1643 /*
1644 * If a byte range lock or Share deny or couldn't re-open, free it.
1645 */
1646 if (mustdelete)
1647 nfscl_freeopen(op, 0, true);
1648 return (mustdelete);
1649 }
1650
1651 /*
1652 * Free up an open owner structure.
1653 */
1654 static void
nfscl_freeopenowner(struct nfsclowner * owp,int local)1655 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1656 {
1657 int owned;
1658
1659 /*
1660 * Make sure the NFSCLSTATE mutex is held, to avoid races with
1661 * calls in nfscl_renewthread() that do not hold a reference
1662 * count on the nfsclclient and just the mutex.
1663 * The mutex will not be held for calls done with the exclusive
1664 * nfsclclient lock held, in particular, nfscl_hasexpired()
1665 * and nfscl_recalldeleg() might do this.
1666 */
1667 owned = mtx_owned(NFSCLSTATEMUTEXPTR);
1668 if (owned == 0)
1669 NFSLOCKCLSTATE();
1670 LIST_REMOVE(owp, nfsow_list);
1671 if (owned == 0)
1672 NFSUNLOCKCLSTATE();
1673 free(owp, M_NFSCLOWNER);
1674 if (local)
1675 nfsstatsv1.cllocalopenowners--;
1676 else
1677 nfsstatsv1.clopenowners--;
1678 }
1679
1680 /*
1681 * Free up a byte range lock owner structure.
1682 */
1683 void
nfscl_freelockowner(struct nfscllockowner * lp,int local)1684 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1685 {
1686 struct nfscllock *lop, *nlop;
1687 int owned;
1688
1689 /*
1690 * Make sure the NFSCLSTATE mutex is held, to avoid races with
1691 * calls in nfscl_renewthread() that do not hold a reference
1692 * count on the nfsclclient and just the mutex.
1693 * The mutex will not be held for calls done with the exclusive
1694 * nfsclclient lock held, in particular, nfscl_hasexpired()
1695 * and nfscl_recalldeleg() might do this.
1696 */
1697 owned = mtx_owned(NFSCLSTATEMUTEXPTR);
1698 if (owned == 0)
1699 NFSLOCKCLSTATE();
1700 LIST_REMOVE(lp, nfsl_list);
1701 if (owned == 0)
1702 NFSUNLOCKCLSTATE();
1703 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1704 nfscl_freelock(lop, local);
1705 }
1706 free(lp, M_NFSCLLOCKOWNER);
1707 if (local)
1708 nfsstatsv1.cllocallockowners--;
1709 else
1710 nfsstatsv1.cllockowners--;
1711 }
1712
1713 /*
1714 * Free up a byte range lock structure.
1715 */
1716 void
nfscl_freelock(struct nfscllock * lop,int local)1717 nfscl_freelock(struct nfscllock *lop, int local)
1718 {
1719
1720 LIST_REMOVE(lop, nfslo_list);
1721 free(lop, M_NFSCLLOCK);
1722 if (local)
1723 nfsstatsv1.cllocallocks--;
1724 else
1725 nfsstatsv1.cllocks--;
1726 }
1727
1728 /*
1729 * Clean out the state related to a delegation.
1730 */
1731 static void
nfscl_cleandeleg(struct nfscldeleg * dp)1732 nfscl_cleandeleg(struct nfscldeleg *dp)
1733 {
1734 struct nfsclowner *owp, *nowp;
1735 struct nfsclopen *op;
1736
1737 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1738 op = LIST_FIRST(&owp->nfsow_open);
1739 if (op != NULL) {
1740 if (LIST_NEXT(op, nfso_list) != NULL)
1741 panic("nfscleandel");
1742 nfscl_freeopen(op, 1, true);
1743 }
1744 nfscl_freeopenowner(owp, 1);
1745 }
1746 nfscl_freealllocks(&dp->nfsdl_lock, 1);
1747 }
1748
1749 /*
1750 * Free a delegation.
1751 */
1752 static void
nfscl_freedeleg(struct nfscldeleghead * hdp,struct nfscldeleg * dp,bool freeit)1753 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp, bool freeit)
1754 {
1755
1756 TAILQ_REMOVE(hdp, dp, nfsdl_list);
1757 LIST_REMOVE(dp, nfsdl_hash);
1758 if (freeit)
1759 free(dp, M_NFSCLDELEG);
1760 nfsstatsv1.cldelegates--;
1761 nfscl_delegcnt--;
1762 }
1763
1764 /*
1765 * Free up all state related to this client structure.
1766 */
1767 static void
nfscl_cleanclient(struct nfsclclient * clp)1768 nfscl_cleanclient(struct nfsclclient *clp)
1769 {
1770 struct nfsclowner *owp, *nowp;
1771 struct nfsclopen *op, *nop;
1772 struct nfscllayout *lyp, *nlyp;
1773 struct nfscldevinfo *dip, *ndip;
1774
1775 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
1776 nfscl_freelayout(lyp);
1777
1778 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip)
1779 nfscl_freedevinfo(dip);
1780
1781 /* Now, all the OpenOwners, etc. */
1782 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1783 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1784 nfscl_freeopen(op, 0, true);
1785 }
1786 nfscl_freeopenowner(owp, 0);
1787 }
1788 }
1789
1790 /*
1791 * Called when an NFSERR_EXPIRED is received from the server.
1792 */
1793 static void
nfscl_expireclient(struct nfsclclient * clp,struct nfsmount * nmp,struct ucred * cred,NFSPROC_T * p)1794 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1795 struct ucred *cred, NFSPROC_T *p)
1796 {
1797 struct nfsclowner *owp, *nowp, *towp;
1798 struct nfsclopen *op, *nop, *top;
1799 struct nfscldeleg *dp, *ndp;
1800 int ret, printed = 0;
1801
1802 /*
1803 * First, merge locally issued Opens into the list for the server.
1804 */
1805 dp = TAILQ_FIRST(&clp->nfsc_deleg);
1806 while (dp != NULL) {
1807 ndp = TAILQ_NEXT(dp, nfsdl_list);
1808 owp = LIST_FIRST(&dp->nfsdl_owner);
1809 while (owp != NULL) {
1810 nowp = LIST_NEXT(owp, nfsow_list);
1811 op = LIST_FIRST(&owp->nfsow_open);
1812 if (op != NULL) {
1813 if (LIST_NEXT(op, nfso_list) != NULL)
1814 panic("nfsclexp");
1815 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1816 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1817 NFSV4CL_LOCKNAMELEN))
1818 break;
1819 }
1820 if (towp != NULL) {
1821 /* Merge opens in */
1822 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1823 if (top->nfso_fhlen == op->nfso_fhlen &&
1824 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1825 op->nfso_fhlen)) {
1826 top->nfso_mode |= op->nfso_mode;
1827 top->nfso_opencnt += op->nfso_opencnt;
1828 break;
1829 }
1830 }
1831 if (top == NULL) {
1832 /* Just add the open to the owner list */
1833 LIST_REMOVE(op, nfso_list);
1834 op->nfso_own = towp;
1835 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1836 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
1837 op->nfso_fhlen), op, nfso_hash);
1838 nfsstatsv1.cllocalopens--;
1839 nfsstatsv1.clopens++;
1840 }
1841 } else {
1842 /* Just add the openowner to the client list */
1843 LIST_REMOVE(owp, nfsow_list);
1844 owp->nfsow_clp = clp;
1845 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1846 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
1847 op->nfso_fhlen), op, nfso_hash);
1848 nfsstatsv1.cllocalopenowners--;
1849 nfsstatsv1.clopenowners++;
1850 nfsstatsv1.cllocalopens--;
1851 nfsstatsv1.clopens++;
1852 }
1853 }
1854 owp = nowp;
1855 }
1856 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1857 printed = 1;
1858 printf("nfsv4 expired locks lost\n");
1859 }
1860 nfscl_cleandeleg(dp);
1861 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
1862 dp = ndp;
1863 }
1864 if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1865 panic("nfsclexp");
1866
1867 /*
1868 * Now, try and reopen against the server.
1869 */
1870 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1871 owp->nfsow_seqid = 0;
1872 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1873 ret = nfscl_expireopen(clp, op, nmp, cred, p);
1874 if (ret && !printed) {
1875 printed = 1;
1876 printf("nfsv4 expired locks lost\n");
1877 }
1878 }
1879 if (LIST_EMPTY(&owp->nfsow_open))
1880 nfscl_freeopenowner(owp, 0);
1881 }
1882 }
1883
1884 /*
1885 * This function must be called after the process represented by "own" has
1886 * exited. Must be called with CLSTATE lock held.
1887 */
1888 static void
nfscl_cleanup_common(struct nfsclclient * clp,u_int8_t * own)1889 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1890 {
1891 struct nfsclowner *owp, *nowp;
1892 struct nfscllockowner *lp;
1893 struct nfscldeleg *dp;
1894
1895 /* First, get rid of local locks on delegations. */
1896 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1897 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1898 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1899 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1900 panic("nfscllckw");
1901 nfscl_freelockowner(lp, 1);
1902 break;
1903 }
1904 }
1905 }
1906 owp = LIST_FIRST(&clp->nfsc_owner);
1907 while (owp != NULL) {
1908 nowp = LIST_NEXT(owp, nfsow_list);
1909 if (!NFSBCMP(owp->nfsow_owner, own,
1910 NFSV4CL_LOCKNAMELEN)) {
1911 /*
1912 * If there are children that haven't closed the
1913 * file descriptors yet, the opens will still be
1914 * here. For that case, let the renew thread clear
1915 * out the OpenOwner later.
1916 */
1917 if (LIST_EMPTY(&owp->nfsow_open))
1918 nfscl_freeopenowner(owp, 0);
1919 else
1920 owp->nfsow_defunct = 1;
1921 break;
1922 }
1923 owp = nowp;
1924 }
1925 }
1926
1927 /*
1928 * Find open/lock owners for processes that have exited.
1929 */
1930 static void
nfscl_cleanupkext(struct nfsclclient * clp,struct nfscllockownerfhhead * lhp)1931 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1932 {
1933 struct nfsclowner *owp, *nowp;
1934 struct nfsclopen *op;
1935 struct nfscllockowner *lp, *nlp;
1936 struct nfscldeleg *dp;
1937 uint8_t own[NFSV4CL_LOCKNAMELEN];
1938
1939 /*
1940 * All the pidhash locks must be acquired, since they are sx locks
1941 * and must be acquired before the mutexes. The pid(s) that will
1942 * be used aren't known yet, so all the locks need to be acquired.
1943 * Fortunately, this function is only performed once/sec.
1944 */
1945 pidhash_slockall();
1946 NFSLOCKCLSTATE();
1947 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1948 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1949 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1950 if (LIST_EMPTY(&lp->nfsl_lock))
1951 nfscl_emptylockowner(lp, lhp);
1952 }
1953 }
1954 if (nfscl_procdoesntexist(owp->nfsow_owner)) {
1955 memcpy(own, owp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
1956 nfscl_cleanup_common(clp, own);
1957 }
1958 }
1959
1960 /*
1961 * For the single open_owner case, these lock owners need to be
1962 * checked to see if they still exist separately.
1963 * This is because nfscl_procdoesntexist() never returns true for
1964 * the single open_owner so that the above doesn't ever call
1965 * nfscl_cleanup_common().
1966 */
1967 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1968 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1969 if (nfscl_procdoesntexist(lp->nfsl_owner)) {
1970 memcpy(own, lp->nfsl_owner,
1971 NFSV4CL_LOCKNAMELEN);
1972 nfscl_cleanup_common(clp, own);
1973 }
1974 }
1975 }
1976 NFSUNLOCKCLSTATE();
1977 pidhash_sunlockall();
1978 }
1979
1980 /*
1981 * Take the empty lock owner and move it to the local lhp list if the
1982 * associated process no longer exists.
1983 */
1984 static void
nfscl_emptylockowner(struct nfscllockowner * lp,struct nfscllockownerfhhead * lhp)1985 nfscl_emptylockowner(struct nfscllockowner *lp,
1986 struct nfscllockownerfhhead *lhp)
1987 {
1988 struct nfscllockownerfh *lfhp, *mylfhp;
1989 struct nfscllockowner *nlp;
1990 int fnd_it;
1991
1992 /* If not a Posix lock owner, just return. */
1993 if ((lp->nfsl_lockflags & F_POSIX) == 0)
1994 return;
1995
1996 fnd_it = 0;
1997 mylfhp = NULL;
1998 /*
1999 * First, search to see if this lock owner is already in the list.
2000 * If it is, then the associated process no longer exists.
2001 */
2002 SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
2003 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
2004 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
2005 lfhp->nfslfh_len))
2006 mylfhp = lfhp;
2007 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
2008 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
2009 NFSV4CL_LOCKNAMELEN))
2010 fnd_it = 1;
2011 }
2012 /* If not found, check if process still exists. */
2013 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
2014 return;
2015
2016 /* Move the lock owner over to the local list. */
2017 if (mylfhp == NULL) {
2018 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
2019 M_NOWAIT);
2020 if (mylfhp == NULL)
2021 return;
2022 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
2023 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
2024 mylfhp->nfslfh_len);
2025 LIST_INIT(&mylfhp->nfslfh_lock);
2026 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
2027 }
2028 LIST_REMOVE(lp, nfsl_list);
2029 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
2030 }
2031
2032 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */
2033 /*
2034 * Called from nfs umount to free up the clientid.
2035 */
2036 void
nfscl_umount(struct nfsmount * nmp,NFSPROC_T * p,struct nfscldeleghead * dhp)2037 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p, struct nfscldeleghead *dhp)
2038 {
2039 struct nfsclclient *clp;
2040 struct ucred *cred;
2041 int igotlock;
2042
2043 /*
2044 * For the case that matters, this is the thread that set
2045 * MNTK_UNMOUNTF, so it will see it set. The code that follows is
2046 * done to ensure that any thread executing nfscl_getcl() after
2047 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
2048 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
2049 * explanation, courtesy of Alan Cox.
2050 * What follows is a snippet from Alan Cox's email at:
2051 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
2052 *
2053 * 1. Set MNTK_UNMOUNTF
2054 * 2. Acquire a standard FreeBSD mutex "m".
2055 * 3. Update some data structures.
2056 * 4. Release mutex "m".
2057 *
2058 * Then, other threads that acquire "m" after step 4 has occurred will
2059 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to
2060 * step 2 may or may not see MNTK_UNMOUNTF as set.
2061 */
2062 NFSLOCKCLSTATE();
2063 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
2064 fake_global++;
2065 NFSUNLOCKCLSTATE();
2066 NFSLOCKCLSTATE();
2067 }
2068
2069 clp = nmp->nm_clp;
2070 if (clp != NULL) {
2071 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
2072 panic("nfscl umount");
2073
2074 /*
2075 * First, handshake with the nfscl renew thread, to terminate
2076 * it.
2077 */
2078 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
2079 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
2080 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
2081 "nfsclumnt", hz);
2082
2083 /*
2084 * Now, get the exclusive lock on the client state, so
2085 * that no uses of the state are still in progress.
2086 */
2087 do {
2088 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2089 NFSCLSTATEMUTEXPTR, NULL);
2090 } while (!igotlock);
2091 NFSUNLOCKCLSTATE();
2092
2093 /*
2094 * Free up all the state. It will expire on the server, but
2095 * maybe we should do a SetClientId/SetClientIdConfirm so
2096 * the server throws it away?
2097 */
2098 LIST_REMOVE(clp, nfsc_list);
2099 nfscl_delegreturnall(clp, p, dhp);
2100 cred = newnfs_getcred();
2101 if (NFSHASNFSV4N(nmp)) {
2102 nfsrpc_destroysession(nmp, NULL, cred, p);
2103 nfsrpc_destroyclient(nmp, clp, cred, p);
2104 } else
2105 nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
2106 nfscl_cleanclient(clp);
2107 nmp->nm_clp = NULL;
2108 NFSFREECRED(cred);
2109 free(clp, M_NFSCLCLIENT);
2110 } else
2111 NFSUNLOCKCLSTATE();
2112 }
2113
2114 /*
2115 * This function is called when a server replies with NFSERR_STALECLIENTID
2116 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
2117 * doing Opens and Locks with reclaim. If these fail, it deletes the
2118 * corresponding state.
2119 */
2120 static void
nfscl_recover(struct nfsclclient * clp,bool * retokp,struct ucred * cred,NFSPROC_T * p)2121 nfscl_recover(struct nfsclclient *clp, bool *retokp, struct ucred *cred,
2122 NFSPROC_T *p)
2123 {
2124 struct nfsclowner *owp, *nowp;
2125 struct nfsclopen *op, *nop;
2126 struct nfscllockowner *lp, *nlp;
2127 struct nfscllock *lop, *nlop;
2128 struct nfscldeleg *dp, *ndp, *tdp;
2129 struct nfsmount *nmp;
2130 struct ucred *tcred;
2131 struct nfsclopenhead extra_open;
2132 struct nfscldeleghead extra_deleg;
2133 struct nfsreq *rep;
2134 u_int64_t len;
2135 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
2136 int i, igotlock = 0, error, trycnt, firstlock;
2137 struct nfscllayout *lyp, *nlyp;
2138 bool recovered_one;
2139
2140 /*
2141 * First, lock the client structure, so everyone else will
2142 * block when trying to use state.
2143 */
2144 NFSLOCKCLSTATE();
2145 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2146 do {
2147 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2148 NFSCLSTATEMUTEXPTR, NULL);
2149 } while (!igotlock);
2150 NFSUNLOCKCLSTATE();
2151
2152 nmp = clp->nfsc_nmp;
2153 if (nmp == NULL)
2154 panic("nfscl recover");
2155
2156 /*
2157 * For now, just get rid of all layouts. There may be a need
2158 * to do LayoutCommit Ops with reclaim == true later.
2159 */
2160 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
2161 nfscl_freelayout(lyp);
2162 TAILQ_INIT(&clp->nfsc_layout);
2163 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
2164 LIST_INIT(&clp->nfsc_layouthash[i]);
2165
2166 trycnt = 5;
2167 tcred = NULL;
2168 do {
2169 error = nfsrpc_setclient(nmp, clp, 1, retokp, cred, p);
2170 } while ((error == NFSERR_STALECLIENTID ||
2171 error == NFSERR_BADSESSION ||
2172 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2173 if (error) {
2174 NFSLOCKCLSTATE();
2175 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
2176 NFSCLFLAGS_RECVRINPROG);
2177 wakeup(&clp->nfsc_flags);
2178 nfsv4_unlock(&clp->nfsc_lock, 0);
2179 NFSUNLOCKCLSTATE();
2180 return;
2181 }
2182 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2183 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2184
2185 /*
2186 * Mark requests already queued on the server, so that they don't
2187 * initiate another recovery cycle. Any requests already in the
2188 * queue that handle state information will have the old stale
2189 * clientid/stateid and will get a NFSERR_STALESTATEID,
2190 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
2191 * This will be translated to NFSERR_STALEDONTRECOVER when
2192 * R_DONTRECOVER is set.
2193 */
2194 NFSLOCKREQ();
2195 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
2196 if (rep->r_nmp == nmp)
2197 rep->r_flags |= R_DONTRECOVER;
2198 }
2199 NFSUNLOCKREQ();
2200
2201 /*
2202 * If nfsrpc_setclient() returns *retokp == true,
2203 * no more recovery is needed.
2204 */
2205 if (*retokp)
2206 goto out;
2207
2208 /*
2209 * Now, mark all delegations "need reclaim".
2210 */
2211 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
2212 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
2213
2214 TAILQ_INIT(&extra_deleg);
2215 LIST_INIT(&extra_open);
2216 /*
2217 * Now traverse the state lists, doing Open and Lock Reclaims.
2218 */
2219 tcred = newnfs_getcred();
2220 recovered_one = false;
2221 owp = LIST_FIRST(&clp->nfsc_owner);
2222 while (owp != NULL) {
2223 nowp = LIST_NEXT(owp, nfsow_list);
2224 owp->nfsow_seqid = 0;
2225 op = LIST_FIRST(&owp->nfsow_open);
2226 while (op != NULL) {
2227 nop = LIST_NEXT(op, nfso_list);
2228 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2229 /* Search for a delegation to reclaim with the open */
2230 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2231 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2232 continue;
2233 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2234 mode = NFSV4OPEN_ACCESSWRITE;
2235 delegtype = NFSV4OPEN_DELEGATEWRITE;
2236 } else {
2237 mode = NFSV4OPEN_ACCESSREAD;
2238 delegtype = NFSV4OPEN_DELEGATEREAD;
2239 }
2240 if ((op->nfso_mode & mode) == mode &&
2241 op->nfso_fhlen == dp->nfsdl_fhlen &&
2242 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
2243 break;
2244 }
2245 ndp = dp;
2246 if (dp == NULL)
2247 delegtype = NFSV4OPEN_DELEGATENONE;
2248 newnfs_copycred(&op->nfso_cred, tcred);
2249 error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
2250 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
2251 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
2252 tcred, p);
2253 if (!error) {
2254 recovered_one = true;
2255 /* Handle any replied delegation */
2256 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
2257 || NFSMNT_RDONLY(nmp->nm_mountp))) {
2258 if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
2259 mode = NFSV4OPEN_ACCESSWRITE;
2260 else
2261 mode = NFSV4OPEN_ACCESSREAD;
2262 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2263 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2264 continue;
2265 if ((op->nfso_mode & mode) == mode &&
2266 op->nfso_fhlen == dp->nfsdl_fhlen &&
2267 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
2268 op->nfso_fhlen)) {
2269 dp->nfsdl_stateid = ndp->nfsdl_stateid;
2270 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
2271 dp->nfsdl_ace = ndp->nfsdl_ace;
2272 dp->nfsdl_change = ndp->nfsdl_change;
2273 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2274 if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
2275 dp->nfsdl_flags |= NFSCLDL_RECALL;
2276 free(ndp, M_NFSCLDELEG);
2277 ndp = NULL;
2278 break;
2279 }
2280 }
2281 }
2282 if (ndp != NULL)
2283 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
2284
2285 /* and reclaim all byte range locks */
2286 lp = LIST_FIRST(&op->nfso_lock);
2287 while (lp != NULL) {
2288 nlp = LIST_NEXT(lp, nfsl_list);
2289 lp->nfsl_seqid = 0;
2290 firstlock = 1;
2291 lop = LIST_FIRST(&lp->nfsl_lock);
2292 while (lop != NULL) {
2293 nlop = LIST_NEXT(lop, nfslo_list);
2294 if (lop->nfslo_end == NFS64BITSSET)
2295 len = NFS64BITSSET;
2296 else
2297 len = lop->nfslo_end - lop->nfslo_first;
2298 error = nfscl_trylock(nmp, NULL,
2299 op->nfso_fh, op->nfso_fhlen, lp,
2300 firstlock, 1, lop->nfslo_first, len,
2301 lop->nfslo_type, tcred, p);
2302 if (error != 0)
2303 nfscl_freelock(lop, 0);
2304 else
2305 firstlock = 0;
2306 lop = nlop;
2307 }
2308 /* If no locks, but a lockowner, just delete it. */
2309 if (LIST_EMPTY(&lp->nfsl_lock))
2310 nfscl_freelockowner(lp, 0);
2311 lp = nlp;
2312 }
2313 } else if (error == NFSERR_NOGRACE && !recovered_one &&
2314 NFSHASNFSV4N(nmp)) {
2315 /*
2316 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will
2317 * actually end up here, since the client will do
2318 * a recovery for NFSERR_BADSESSION, but will get
2319 * an NFSERR_NOGRACE reply for the first "reclaim"
2320 * attempt.
2321 * So, call nfscl_expireclient() to recover the
2322 * opens as best we can and then do a reclaim
2323 * complete and return.
2324 */
2325 nfsrpc_reclaimcomplete(nmp, cred, p);
2326 nfscl_expireclient(clp, nmp, tcred, p);
2327 goto out;
2328 }
2329 }
2330 if (error != 0 && error != NFSERR_BADSESSION)
2331 nfscl_freeopen(op, 0, true);
2332 op = nop;
2333 }
2334 owp = nowp;
2335 }
2336
2337 /*
2338 * Now, try and get any delegations not yet reclaimed by cobbling
2339 * to-gether an appropriate open.
2340 */
2341 nowp = NULL;
2342 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2343 while (dp != NULL) {
2344 ndp = TAILQ_NEXT(dp, nfsdl_list);
2345 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2346 if (nowp == NULL) {
2347 nowp = malloc(
2348 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2349 /*
2350 * Name must be as long an largest possible
2351 * NFSV4CL_LOCKNAMELEN. 12 for now.
2352 */
2353 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2354 NFSV4CL_LOCKNAMELEN);
2355 LIST_INIT(&nowp->nfsow_open);
2356 nowp->nfsow_clp = clp;
2357 nowp->nfsow_seqid = 0;
2358 nowp->nfsow_defunct = 0;
2359 nfscl_lockinit(&nowp->nfsow_rwlock);
2360 }
2361 nop = NULL;
2362 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2363 nop = malloc(sizeof (struct nfsclopen) +
2364 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2365 nop->nfso_own = nowp;
2366 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2367 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2368 delegtype = NFSV4OPEN_DELEGATEWRITE;
2369 } else {
2370 nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2371 delegtype = NFSV4OPEN_DELEGATEREAD;
2372 }
2373 nop->nfso_opencnt = 0;
2374 nop->nfso_posixlock = 1;
2375 nop->nfso_fhlen = dp->nfsdl_fhlen;
2376 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2377 LIST_INIT(&nop->nfso_lock);
2378 nop->nfso_stateid.seqid = 0;
2379 nop->nfso_stateid.other[0] = 0;
2380 nop->nfso_stateid.other[1] = 0;
2381 nop->nfso_stateid.other[2] = 0;
2382 newnfs_copycred(&dp->nfsdl_cred, tcred);
2383 newnfs_copyincred(tcred, &nop->nfso_cred);
2384 tdp = NULL;
2385 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2386 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2387 nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2388 delegtype, tcred, p);
2389 if (tdp != NULL) {
2390 if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2391 mode = NFSV4OPEN_ACCESSWRITE;
2392 else
2393 mode = NFSV4OPEN_ACCESSREAD;
2394 if ((nop->nfso_mode & mode) == mode &&
2395 nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2396 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2397 nop->nfso_fhlen)) {
2398 dp->nfsdl_stateid = tdp->nfsdl_stateid;
2399 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2400 dp->nfsdl_ace = tdp->nfsdl_ace;
2401 dp->nfsdl_change = tdp->nfsdl_change;
2402 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2403 if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2404 dp->nfsdl_flags |= NFSCLDL_RECALL;
2405 free(tdp, M_NFSCLDELEG);
2406 } else {
2407 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2408 }
2409 }
2410 }
2411 if (error) {
2412 if (nop != NULL)
2413 free(nop, M_NFSCLOPEN);
2414 if (error == NFSERR_NOGRACE && !recovered_one &&
2415 NFSHASNFSV4N(nmp)) {
2416 /*
2417 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will
2418 * actually end up here, since the client will do
2419 * a recovery for NFSERR_BADSESSION, but will get
2420 * an NFSERR_NOGRACE reply for the first "reclaim"
2421 * attempt.
2422 * So, call nfscl_expireclient() to recover the
2423 * opens as best we can and then do a reclaim
2424 * complete and return.
2425 */
2426 nfsrpc_reclaimcomplete(nmp, cred, p);
2427 nfscl_expireclient(clp, nmp, tcred, p);
2428 free(nowp, M_NFSCLOWNER);
2429 goto out;
2430 }
2431 /*
2432 * Couldn't reclaim it, so throw the state
2433 * away. Ouch!!
2434 */
2435 nfscl_cleandeleg(dp);
2436 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
2437 } else {
2438 recovered_one = true;
2439 LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2440 }
2441 }
2442 dp = ndp;
2443 }
2444
2445 /*
2446 * Now, get rid of extra Opens and Delegations.
2447 */
2448 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2449 do {
2450 newnfs_copycred(&op->nfso_cred, tcred);
2451 error = nfscl_tryclose(op, tcred, nmp, p, true);
2452 if (error == NFSERR_GRACE)
2453 (void) nfs_catnap(PZERO, error, "nfsexcls");
2454 } while (error == NFSERR_GRACE);
2455 LIST_REMOVE(op, nfso_list);
2456 free(op, M_NFSCLOPEN);
2457 }
2458 if (nowp != NULL)
2459 free(nowp, M_NFSCLOWNER);
2460
2461 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2462 do {
2463 newnfs_copycred(&dp->nfsdl_cred, tcred);
2464 error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2465 if (error == NFSERR_GRACE)
2466 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2467 } while (error == NFSERR_GRACE);
2468 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2469 free(dp, M_NFSCLDELEG);
2470 }
2471
2472 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
2473 if (NFSHASNFSV4N(nmp))
2474 (void)nfsrpc_reclaimcomplete(nmp, cred, p);
2475
2476 out:
2477 NFSLOCKCLSTATE();
2478 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2479 wakeup(&clp->nfsc_flags);
2480 nfsv4_unlock(&clp->nfsc_lock, 0);
2481 NFSUNLOCKCLSTATE();
2482 if (tcred != NULL)
2483 NFSFREECRED(tcred);
2484 }
2485
2486 /*
2487 * This function is called when a server replies with NFSERR_EXPIRED.
2488 * It deletes all state for the client and does a fresh SetClientId/confirm.
2489 * XXX Someday it should post a signal to the process(es) that hold the
2490 * state, so they know that lock state has been lost.
2491 */
2492 int
nfscl_hasexpired(struct nfsclclient * clp,u_int32_t clidrev,NFSPROC_T * p)2493 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2494 {
2495 struct nfsmount *nmp;
2496 struct ucred *cred;
2497 int igotlock = 0, error, trycnt;
2498
2499 /*
2500 * If the clientid has gone away or a new SetClientid has already
2501 * been done, just return ok.
2502 */
2503 if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2504 return (0);
2505
2506 /*
2507 * First, lock the client structure, so everyone else will
2508 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2509 * that only one thread does the work.
2510 */
2511 NFSLOCKCLSTATE();
2512 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2513 do {
2514 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2515 NFSCLSTATEMUTEXPTR, NULL);
2516 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2517 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2518 if (igotlock)
2519 nfsv4_unlock(&clp->nfsc_lock, 0);
2520 NFSUNLOCKCLSTATE();
2521 return (0);
2522 }
2523 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2524 NFSUNLOCKCLSTATE();
2525
2526 nmp = clp->nfsc_nmp;
2527 if (nmp == NULL)
2528 panic("nfscl expired");
2529 cred = newnfs_getcred();
2530 trycnt = 5;
2531 do {
2532 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
2533 } while ((error == NFSERR_STALECLIENTID ||
2534 error == NFSERR_BADSESSION ||
2535 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2536 if (error) {
2537 NFSLOCKCLSTATE();
2538 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2539 } else {
2540 /*
2541 * Expire the state for the client.
2542 */
2543 nfscl_expireclient(clp, nmp, cred, p);
2544 NFSLOCKCLSTATE();
2545 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2546 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2547 }
2548 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2549 wakeup(&clp->nfsc_flags);
2550 nfsv4_unlock(&clp->nfsc_lock, 0);
2551 NFSUNLOCKCLSTATE();
2552 NFSFREECRED(cred);
2553 return (error);
2554 }
2555
2556 /*
2557 * This function inserts a lock in the list after insert_lop.
2558 */
2559 static void
nfscl_insertlock(struct nfscllockowner * lp,struct nfscllock * new_lop,struct nfscllock * insert_lop,int local)2560 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2561 struct nfscllock *insert_lop, int local)
2562 {
2563
2564 if ((struct nfscllockowner *)insert_lop == lp)
2565 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2566 else
2567 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2568 if (local)
2569 nfsstatsv1.cllocallocks++;
2570 else
2571 nfsstatsv1.cllocks++;
2572 }
2573
2574 /*
2575 * This function updates the locking for a lock owner and given file. It
2576 * maintains a list of lock ranges ordered on increasing file offset that
2577 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2578 * It always adds new_lop to the list and sometimes uses the one pointed
2579 * at by other_lopp.
2580 * Returns 1 if the locks were modified, 0 otherwise.
2581 */
2582 static int
nfscl_updatelock(struct nfscllockowner * lp,struct nfscllock ** new_lopp,struct nfscllock ** other_lopp,int local)2583 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2584 struct nfscllock **other_lopp, int local)
2585 {
2586 struct nfscllock *new_lop = *new_lopp;
2587 struct nfscllock *lop, *tlop, *ilop;
2588 struct nfscllock *other_lop;
2589 int unlock = 0, modified = 0;
2590 u_int64_t tmp;
2591
2592 /*
2593 * Work down the list until the lock is merged.
2594 */
2595 if (new_lop->nfslo_type == F_UNLCK)
2596 unlock = 1;
2597 ilop = (struct nfscllock *)lp;
2598 lop = LIST_FIRST(&lp->nfsl_lock);
2599 while (lop != NULL) {
2600 /*
2601 * Only check locks for this file that aren't before the start of
2602 * new lock's range.
2603 */
2604 if (lop->nfslo_end >= new_lop->nfslo_first) {
2605 if (new_lop->nfslo_end < lop->nfslo_first) {
2606 /*
2607 * If the new lock ends before the start of the
2608 * current lock's range, no merge, just insert
2609 * the new lock.
2610 */
2611 break;
2612 }
2613 if (new_lop->nfslo_type == lop->nfslo_type ||
2614 (new_lop->nfslo_first <= lop->nfslo_first &&
2615 new_lop->nfslo_end >= lop->nfslo_end)) {
2616 /*
2617 * This lock can be absorbed by the new lock/unlock.
2618 * This happens when it covers the entire range
2619 * of the old lock or is contiguous
2620 * with the old lock and is of the same type or an
2621 * unlock.
2622 */
2623 if (new_lop->nfslo_type != lop->nfslo_type ||
2624 new_lop->nfslo_first != lop->nfslo_first ||
2625 new_lop->nfslo_end != lop->nfslo_end)
2626 modified = 1;
2627 if (lop->nfslo_first < new_lop->nfslo_first)
2628 new_lop->nfslo_first = lop->nfslo_first;
2629 if (lop->nfslo_end > new_lop->nfslo_end)
2630 new_lop->nfslo_end = lop->nfslo_end;
2631 tlop = lop;
2632 lop = LIST_NEXT(lop, nfslo_list);
2633 nfscl_freelock(tlop, local);
2634 continue;
2635 }
2636
2637 /*
2638 * All these cases are for contiguous locks that are not the
2639 * same type, so they can't be merged.
2640 */
2641 if (new_lop->nfslo_first <= lop->nfslo_first) {
2642 /*
2643 * This case is where the new lock overlaps with the
2644 * first part of the old lock. Move the start of the
2645 * old lock to just past the end of the new lock. The
2646 * new lock will be inserted in front of the old, since
2647 * ilop hasn't been updated. (We are done now.)
2648 */
2649 if (lop->nfslo_first != new_lop->nfslo_end) {
2650 lop->nfslo_first = new_lop->nfslo_end;
2651 modified = 1;
2652 }
2653 break;
2654 }
2655 if (new_lop->nfslo_end >= lop->nfslo_end) {
2656 /*
2657 * This case is where the new lock overlaps with the
2658 * end of the old lock's range. Move the old lock's
2659 * end to just before the new lock's first and insert
2660 * the new lock after the old lock.
2661 * Might not be done yet, since the new lock could
2662 * overlap further locks with higher ranges.
2663 */
2664 if (lop->nfslo_end != new_lop->nfslo_first) {
2665 lop->nfslo_end = new_lop->nfslo_first;
2666 modified = 1;
2667 }
2668 ilop = lop;
2669 lop = LIST_NEXT(lop, nfslo_list);
2670 continue;
2671 }
2672 /*
2673 * The final case is where the new lock's range is in the
2674 * middle of the current lock's and splits the current lock
2675 * up. Use *other_lopp to handle the second part of the
2676 * split old lock range. (We are done now.)
2677 * For unlock, we use new_lop as other_lop and tmp, since
2678 * other_lop and new_lop are the same for this case.
2679 * We noted the unlock case above, so we don't need
2680 * new_lop->nfslo_type any longer.
2681 */
2682 tmp = new_lop->nfslo_first;
2683 if (unlock) {
2684 other_lop = new_lop;
2685 *new_lopp = NULL;
2686 } else {
2687 other_lop = *other_lopp;
2688 *other_lopp = NULL;
2689 }
2690 other_lop->nfslo_first = new_lop->nfslo_end;
2691 other_lop->nfslo_end = lop->nfslo_end;
2692 other_lop->nfslo_type = lop->nfslo_type;
2693 lop->nfslo_end = tmp;
2694 nfscl_insertlock(lp, other_lop, lop, local);
2695 ilop = lop;
2696 modified = 1;
2697 break;
2698 }
2699 ilop = lop;
2700 lop = LIST_NEXT(lop, nfslo_list);
2701 if (lop == NULL)
2702 break;
2703 }
2704
2705 /*
2706 * Insert the new lock in the list at the appropriate place.
2707 */
2708 if (!unlock) {
2709 nfscl_insertlock(lp, new_lop, ilop, local);
2710 *new_lopp = NULL;
2711 modified = 1;
2712 }
2713 return (modified);
2714 }
2715
2716 /*
2717 * This function must be run as a kernel thread.
2718 * It does Renew Ops and recovery, when required.
2719 */
2720 void
nfscl_renewthread(struct nfsclclient * clp,NFSPROC_T * p)2721 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2722 {
2723 struct nfsclowner *owp, *nowp;
2724 struct nfsclopen *op;
2725 struct nfscllockowner *lp, *nlp;
2726 struct nfscldeleghead dh;
2727 struct nfscldeleg *dp, *ndp;
2728 struct ucred *cred;
2729 u_int32_t clidrev;
2730 int error, cbpathdown, islept, igotlock, ret, clearok;
2731 uint32_t recover_done_time = 0;
2732 time_t mytime;
2733 static time_t prevsec = 0;
2734 struct nfscllockownerfh *lfhp, *nlfhp;
2735 struct nfscllockownerfhhead lfh;
2736 struct nfscllayout *lyp, *nlyp;
2737 struct nfscldevinfo *dip, *ndip;
2738 struct nfscllayouthead rlh;
2739 struct nfsclrecalllayout *recallp;
2740 struct nfsclds *dsp;
2741 bool retok;
2742 struct mount *mp;
2743 vnode_t vp;
2744
2745 cred = newnfs_getcred();
2746 NFSLOCKCLSTATE();
2747 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2748 mp = clp->nfsc_nmp->nm_mountp;
2749 NFSUNLOCKCLSTATE();
2750 for(;;) {
2751 newnfs_setroot(cred);
2752 cbpathdown = 0;
2753 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2754 /*
2755 * Only allow one full recover within 1/2 of the lease
2756 * duration (nfsc_renew).
2757 * retok is value/result. If passed in set to true,
2758 * it indicates only a CreateSession operation should
2759 * be attempted.
2760 * If it is returned true, it indicates that the
2761 * recovery only required a CreateSession.
2762 */
2763 retok = true;
2764 if (recover_done_time < NFSD_MONOSEC) {
2765 recover_done_time = NFSD_MONOSEC +
2766 clp->nfsc_renew;
2767 retok = false;
2768 }
2769 NFSCL_DEBUG(1, "Doing recovery, only "
2770 "createsession=%d\n", retok);
2771 nfscl_recover(clp, &retok, cred, p);
2772 }
2773 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2774 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2775 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2776 clidrev = clp->nfsc_clientidrev;
2777 error = nfsrpc_renew(clp, NULL, cred, p);
2778 if (error == NFSERR_CBPATHDOWN)
2779 cbpathdown = 1;
2780 else if (error == NFSERR_STALECLIENTID) {
2781 NFSLOCKCLSTATE();
2782 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2783 NFSUNLOCKCLSTATE();
2784 } else if (error == NFSERR_EXPIRED)
2785 (void) nfscl_hasexpired(clp, clidrev, p);
2786 }
2787
2788 checkdsrenew:
2789 if (NFSHASNFSV4N(clp->nfsc_nmp)) {
2790 /* Do renews for any DS sessions. */
2791 NFSLOCKMNT(clp->nfsc_nmp);
2792 /* Skip first entry, since the MDS is handled above. */
2793 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
2794 if (dsp != NULL)
2795 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2796 while (dsp != NULL) {
2797 if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
2798 dsp->nfsclds_sess.nfsess_defunct == 0) {
2799 dsp->nfsclds_expire = NFSD_MONOSEC +
2800 clp->nfsc_renew;
2801 NFSUNLOCKMNT(clp->nfsc_nmp);
2802 (void)nfsrpc_renew(clp, dsp, cred, p);
2803 goto checkdsrenew;
2804 }
2805 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2806 }
2807 NFSUNLOCKMNT(clp->nfsc_nmp);
2808 }
2809
2810 TAILQ_INIT(&dh);
2811 NFSLOCKCLSTATE();
2812 if (cbpathdown)
2813 /* It's a Total Recall! */
2814 nfscl_totalrecall(clp);
2815
2816 /*
2817 * Now, handle defunct owners.
2818 */
2819 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2820 if (LIST_EMPTY(&owp->nfsow_open)) {
2821 if (owp->nfsow_defunct != 0)
2822 nfscl_freeopenowner(owp, 0);
2823 }
2824 }
2825
2826 /*
2827 * Do the recall on any delegations. To avoid trouble, always
2828 * come back up here after having slept.
2829 */
2830 igotlock = 0;
2831 tryagain:
2832 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2833 while (dp != NULL) {
2834 ndp = TAILQ_NEXT(dp, nfsdl_list);
2835 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2836 /*
2837 * Wait for outstanding I/O ops to be done.
2838 */
2839 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2840 if (igotlock) {
2841 nfsv4_unlock(&clp->nfsc_lock, 0);
2842 igotlock = 0;
2843 }
2844 dp->nfsdl_rwlock.nfslock_lock |=
2845 NFSV4LOCK_WANTED;
2846 msleep(&dp->nfsdl_rwlock,
2847 NFSCLSTATEMUTEXPTR, PVFS, "nfscld",
2848 5 * hz);
2849 if (NFSCL_FORCEDISM(mp))
2850 goto terminate;
2851 goto tryagain;
2852 }
2853 while (!igotlock) {
2854 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2855 &islept, NFSCLSTATEMUTEXPTR, mp);
2856 if (igotlock == 0 && NFSCL_FORCEDISM(mp))
2857 goto terminate;
2858 if (islept)
2859 goto tryagain;
2860 }
2861 NFSUNLOCKCLSTATE();
2862 newnfs_copycred(&dp->nfsdl_cred, cred);
2863 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2864 NULL, cred, p, 1, &vp);
2865 if (!ret) {
2866 nfscl_cleandeleg(dp);
2867 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2868 nfsdl_list);
2869 LIST_REMOVE(dp, nfsdl_hash);
2870 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2871 nfscl_delegcnt--;
2872 nfsstatsv1.cldelegates--;
2873 }
2874 NFSLOCKCLSTATE();
2875 /*
2876 * The nfsc_lock must be released before doing
2877 * vrele(), since it might call nfs_inactive().
2878 * For the unlikely case where the vnode failed
2879 * to be acquired by nfscl_recalldeleg(), a
2880 * VOP_RECLAIM() should be in progress and it
2881 * will return the delegation.
2882 */
2883 nfsv4_unlock(&clp->nfsc_lock, 0);
2884 igotlock = 0;
2885 if (vp != NULL) {
2886 NFSUNLOCKCLSTATE();
2887 vrele(vp);
2888 NFSLOCKCLSTATE();
2889 }
2890 goto tryagain;
2891 }
2892 dp = ndp;
2893 }
2894
2895 /*
2896 * Clear out old delegations, if we are above the high water
2897 * mark. Only clear out ones with no state related to them.
2898 * The tailq list is in LRU order.
2899 */
2900 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2901 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2902 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2903 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2904 dp->nfsdl_rwlock.nfslock_lock == 0 &&
2905 dp->nfsdl_timestamp < NFSD_MONOSEC &&
2906 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2907 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2908 clearok = 1;
2909 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2910 op = LIST_FIRST(&owp->nfsow_open);
2911 if (op != NULL) {
2912 clearok = 0;
2913 break;
2914 }
2915 }
2916 if (clearok) {
2917 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2918 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2919 clearok = 0;
2920 break;
2921 }
2922 }
2923 }
2924 if (clearok) {
2925 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2926 LIST_REMOVE(dp, nfsdl_hash);
2927 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2928 nfscl_delegcnt--;
2929 nfsstatsv1.cldelegates--;
2930 }
2931 }
2932 dp = ndp;
2933 }
2934 if (igotlock)
2935 nfsv4_unlock(&clp->nfsc_lock, 0);
2936
2937 /*
2938 * Do the recall on any layouts. To avoid trouble, always
2939 * come back up here after having slept.
2940 */
2941 TAILQ_INIT(&rlh);
2942 tryagain2:
2943 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
2944 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
2945 /*
2946 * Wait for outstanding I/O ops to be done.
2947 */
2948 if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
2949 (lyp->nfsly_lock.nfslock_lock &
2950 NFSV4LOCK_LOCK) != 0) {
2951 lyp->nfsly_lock.nfslock_lock |=
2952 NFSV4LOCK_WANTED;
2953 msleep(&lyp->nfsly_lock.nfslock_lock,
2954 NFSCLSTATEMUTEXPTR, PVFS, "nfslyp",
2955 5 * hz);
2956 if (NFSCL_FORCEDISM(mp))
2957 goto terminate;
2958 goto tryagain2;
2959 }
2960 /* Move the layout to the recall list. */
2961 TAILQ_REMOVE(&clp->nfsc_layout, lyp,
2962 nfsly_list);
2963 LIST_REMOVE(lyp, nfsly_hash);
2964 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
2965
2966 /* Handle any layout commits. */
2967 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
2968 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
2969 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
2970 NFSUNLOCKCLSTATE();
2971 NFSCL_DEBUG(3, "do layoutcommit\n");
2972 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
2973 cred, p);
2974 NFSLOCKCLSTATE();
2975 goto tryagain2;
2976 }
2977 }
2978 }
2979
2980 /* Now, look for stale layouts. */
2981 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
2982 while (lyp != NULL) {
2983 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
2984 if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
2985 (lyp->nfsly_flags & (NFSLY_RECALL |
2986 NFSLY_RETONCLOSE)) == 0 &&
2987 lyp->nfsly_lock.nfslock_usecnt == 0 &&
2988 lyp->nfsly_lock.nfslock_lock == 0) {
2989 NFSCL_DEBUG(4, "ret stale lay=%d\n",
2990 nfscl_layoutcnt);
2991 recallp = malloc(sizeof(*recallp),
2992 M_NFSLAYRECALL, M_NOWAIT);
2993 if (recallp == NULL)
2994 break;
2995 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
2996 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
2997 lyp->nfsly_stateid.seqid, 0, 0, NULL,
2998 recallp);
2999 }
3000 lyp = nlyp;
3001 }
3002
3003 /*
3004 * Free up any unreferenced device info structures.
3005 */
3006 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
3007 if (dip->nfsdi_layoutrefs == 0 &&
3008 dip->nfsdi_refcnt == 0) {
3009 NFSCL_DEBUG(4, "freeing devinfo\n");
3010 LIST_REMOVE(dip, nfsdi_list);
3011 nfscl_freedevinfo(dip);
3012 }
3013 }
3014 NFSUNLOCKCLSTATE();
3015
3016 /* Do layout return(s), as required. */
3017 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
3018 TAILQ_REMOVE(&rlh, lyp, nfsly_list);
3019 NFSCL_DEBUG(4, "ret layout\n");
3020 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
3021 if ((lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) {
3022 NFSLOCKCLSTATE();
3023 lyp->nfsly_flags |= NFSLY_RETURNED;
3024 wakeup(lyp);
3025 NFSUNLOCKCLSTATE();
3026 } else
3027 nfscl_freelayout(lyp);
3028 }
3029
3030 /*
3031 * Delegreturn any delegations cleaned out or recalled.
3032 */
3033 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
3034 newnfs_copycred(&dp->nfsdl_cred, cred);
3035 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3036 TAILQ_REMOVE(&dh, dp, nfsdl_list);
3037 free(dp, M_NFSCLDELEG);
3038 }
3039
3040 SLIST_INIT(&lfh);
3041 /*
3042 * Call nfscl_cleanupkext() once per second to check for
3043 * open/lock owners where the process has exited.
3044 */
3045 mytime = NFSD_MONOSEC;
3046 if (prevsec != mytime) {
3047 prevsec = mytime;
3048 nfscl_cleanupkext(clp, &lfh);
3049 }
3050
3051 /*
3052 * Do a ReleaseLockOwner for all lock owners where the
3053 * associated process no longer exists, as found by
3054 * nfscl_cleanupkext().
3055 */
3056 newnfs_setroot(cred);
3057 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
3058 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
3059 nlp) {
3060 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
3061 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
3062 p);
3063 nfscl_freelockowner(lp, 0);
3064 }
3065 free(lfhp, M_TEMP);
3066 }
3067 SLIST_INIT(&lfh);
3068
3069 NFSLOCKCLSTATE();
3070 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
3071 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
3072 hz);
3073 terminate:
3074 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
3075 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
3076 NFSUNLOCKCLSTATE();
3077 NFSFREECRED(cred);
3078 wakeup((caddr_t)clp);
3079 return;
3080 }
3081 NFSUNLOCKCLSTATE();
3082 }
3083 }
3084
3085 /*
3086 * Initiate state recovery. Called when NFSERR_STALECLIENTID,
3087 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
3088 */
3089 void
nfscl_initiate_recovery(struct nfsclclient * clp)3090 nfscl_initiate_recovery(struct nfsclclient *clp)
3091 {
3092
3093 if (clp == NULL)
3094 return;
3095 NFSLOCKCLSTATE();
3096 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
3097 NFSUNLOCKCLSTATE();
3098 wakeup((caddr_t)clp);
3099 }
3100
3101 /*
3102 * Dump out the state stuff for debugging.
3103 */
3104 void
nfscl_dumpstate(struct nfsmount * nmp,int openowner,int opens,int lockowner,int locks)3105 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
3106 int lockowner, int locks)
3107 {
3108 struct nfsclclient *clp;
3109 struct nfsclowner *owp;
3110 struct nfsclopen *op;
3111 struct nfscllockowner *lp;
3112 struct nfscllock *lop;
3113 struct nfscldeleg *dp;
3114
3115 clp = nmp->nm_clp;
3116 if (clp == NULL) {
3117 printf("nfscl dumpstate NULL clp\n");
3118 return;
3119 }
3120 NFSLOCKCLSTATE();
3121 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
3122 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3123 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
3124 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
3125 owp->nfsow_owner[0], owp->nfsow_owner[1],
3126 owp->nfsow_owner[2], owp->nfsow_owner[3],
3127 owp->nfsow_seqid);
3128 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3129 if (opens)
3130 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
3131 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
3132 op->nfso_stateid.other[2], op->nfso_opencnt,
3133 op->nfso_fh[12]);
3134 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
3135 if (lockowner)
3136 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
3137 lp->nfsl_owner[0], lp->nfsl_owner[1],
3138 lp->nfsl_owner[2], lp->nfsl_owner[3],
3139 lp->nfsl_seqid,
3140 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
3141 lp->nfsl_stateid.other[2]);
3142 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3143 if (locks)
3144 #ifdef __FreeBSD__
3145 printf("lck typ=%d fst=%ju end=%ju\n",
3146 lop->nfslo_type, (intmax_t)lop->nfslo_first,
3147 (intmax_t)lop->nfslo_end);
3148 #else
3149 printf("lck typ=%d fst=%qd end=%qd\n",
3150 lop->nfslo_type, lop->nfslo_first,
3151 lop->nfslo_end);
3152 #endif
3153 }
3154 }
3155 }
3156 }
3157 }
3158 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3159 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
3160 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
3161 owp->nfsow_owner[0], owp->nfsow_owner[1],
3162 owp->nfsow_owner[2], owp->nfsow_owner[3],
3163 owp->nfsow_seqid);
3164 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3165 if (opens)
3166 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
3167 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
3168 op->nfso_stateid.other[2], op->nfso_opencnt,
3169 op->nfso_fh[12]);
3170 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
3171 if (lockowner)
3172 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
3173 lp->nfsl_owner[0], lp->nfsl_owner[1],
3174 lp->nfsl_owner[2], lp->nfsl_owner[3],
3175 lp->nfsl_seqid,
3176 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
3177 lp->nfsl_stateid.other[2]);
3178 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3179 if (locks)
3180 #ifdef __FreeBSD__
3181 printf("lck typ=%d fst=%ju end=%ju\n",
3182 lop->nfslo_type, (intmax_t)lop->nfslo_first,
3183 (intmax_t)lop->nfslo_end);
3184 #else
3185 printf("lck typ=%d fst=%qd end=%qd\n",
3186 lop->nfslo_type, lop->nfslo_first,
3187 lop->nfslo_end);
3188 #endif
3189 }
3190 }
3191 }
3192 }
3193 NFSUNLOCKCLSTATE();
3194 }
3195
3196 /*
3197 * Check for duplicate open owners and opens.
3198 * (Only used as a diagnostic aid.)
3199 */
3200 void
nfscl_dupopen(vnode_t vp,int dupopens)3201 nfscl_dupopen(vnode_t vp, int dupopens)
3202 {
3203 struct nfsclclient *clp;
3204 struct nfsclowner *owp, *owp2;
3205 struct nfsclopen *op, *op2;
3206 struct nfsfh *nfhp;
3207
3208 clp = VFSTONFS(vp->v_mount)->nm_clp;
3209 if (clp == NULL) {
3210 printf("nfscl dupopen NULL clp\n");
3211 return;
3212 }
3213 nfhp = VTONFS(vp)->n_fhp;
3214 NFSLOCKCLSTATE();
3215
3216 /*
3217 * First, search for duplicate owners.
3218 * These should never happen!
3219 */
3220 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3221 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3222 if (owp != owp2 &&
3223 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
3224 NFSV4CL_LOCKNAMELEN)) {
3225 NFSUNLOCKCLSTATE();
3226 printf("DUP OWNER\n");
3227 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
3228 return;
3229 }
3230 }
3231 }
3232
3233 /*
3234 * Now, search for duplicate stateids.
3235 * These shouldn't happen, either.
3236 */
3237 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3238 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3239 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3240 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3241 if (op != op2 &&
3242 (op->nfso_stateid.other[0] != 0 ||
3243 op->nfso_stateid.other[1] != 0 ||
3244 op->nfso_stateid.other[2] != 0) &&
3245 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
3246 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
3247 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
3248 NFSUNLOCKCLSTATE();
3249 printf("DUP STATEID\n");
3250 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
3251 return;
3252 }
3253 }
3254 }
3255 }
3256 }
3257
3258 /*
3259 * Now search for duplicate opens.
3260 * Duplicate opens for the same owner
3261 * should never occur. Other duplicates are
3262 * possible and are checked for if "dupopens"
3263 * is true.
3264 */
3265 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3266 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3267 if (nfhp->nfh_len == op2->nfso_fhlen &&
3268 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
3269 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3270 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3271 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
3272 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
3273 (!NFSBCMP(op->nfso_own->nfsow_owner,
3274 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
3275 dupopens)) {
3276 if (!NFSBCMP(op->nfso_own->nfsow_owner,
3277 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3278 NFSUNLOCKCLSTATE();
3279 printf("BADDUP OPEN\n");
3280 } else {
3281 NFSUNLOCKCLSTATE();
3282 printf("DUP OPEN\n");
3283 }
3284 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0,
3285 0);
3286 return;
3287 }
3288 }
3289 }
3290 }
3291 }
3292 }
3293 NFSUNLOCKCLSTATE();
3294 }
3295
3296 /*
3297 * During close, find an open that needs to be dereferenced and
3298 * dereference it. If there are no more opens for this file,
3299 * log a message to that effect.
3300 * Opens aren't actually Close'd until VOP_INACTIVE() is performed
3301 * on the file's vnode.
3302 * This is the safe way, since it is difficult to identify
3303 * which open the close is for and I/O can be performed after the
3304 * close(2) system call when a file is mmap'd.
3305 * If it returns 0 for success, there will be a referenced
3306 * clp returned via clpp.
3307 */
3308 int
nfscl_getclose(vnode_t vp,struct nfsclclient ** clpp)3309 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
3310 {
3311 struct nfsclclient *clp;
3312 struct nfsclowner *owp;
3313 struct nfsclopen *op;
3314 struct nfscldeleg *dp;
3315 struct nfsfh *nfhp;
3316 int error, notdecr;
3317
3318 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
3319 if (error)
3320 return (error);
3321 *clpp = clp;
3322
3323 nfhp = VTONFS(vp)->n_fhp;
3324 notdecr = 1;
3325 NFSLOCKCLSTATE();
3326 /*
3327 * First, look for one under a delegation that was locally issued
3328 * and just decrement the opencnt for it. Since all my Opens against
3329 * the server are DENY_NONE, I don't see a problem with hanging
3330 * onto them. (It is much easier to use one of the extant Opens
3331 * that I already have on the server when a Delegation is recalled
3332 * than to do fresh Opens.) Someday, I might need to rethink this, but.
3333 */
3334 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3335 if (dp != NULL) {
3336 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3337 op = LIST_FIRST(&owp->nfsow_open);
3338 if (op != NULL) {
3339 /*
3340 * Since a delegation is for a file, there
3341 * should never be more than one open for
3342 * each openowner.
3343 */
3344 if (LIST_NEXT(op, nfso_list) != NULL)
3345 panic("nfscdeleg opens");
3346 if (notdecr && op->nfso_opencnt > 0) {
3347 notdecr = 0;
3348 op->nfso_opencnt--;
3349 break;
3350 }
3351 }
3352 }
3353 }
3354
3355 /* Now process the opens against the server. */
3356 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
3357 nfso_hash) {
3358 if (op->nfso_fhlen == nfhp->nfh_len &&
3359 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3360 nfhp->nfh_len)) {
3361 /* Found an open, decrement cnt if possible */
3362 if (notdecr && op->nfso_opencnt > 0) {
3363 notdecr = 0;
3364 op->nfso_opencnt--;
3365 }
3366 /*
3367 * There are more opens, so just return.
3368 */
3369 if (op->nfso_opencnt > 0) {
3370 NFSUNLOCKCLSTATE();
3371 return (0);
3372 }
3373 }
3374 }
3375 NFSUNLOCKCLSTATE();
3376 if (notdecr)
3377 printf("nfscl: never fnd open\n");
3378 return (0);
3379 }
3380
3381 int
nfscl_doclose(vnode_t vp,struct nfsclclient ** clpp,NFSPROC_T * p)3382 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
3383 {
3384 struct nfsclclient *clp;
3385 struct nfsmount *nmp;
3386 struct nfsclowner *owp, *nowp;
3387 struct nfsclopen *op, *nop;
3388 struct nfsclopenhead delayed;
3389 struct nfscldeleg *dp;
3390 struct nfsfh *nfhp;
3391 struct nfsclrecalllayout *recallp;
3392 struct nfscllayout *lyp;
3393 int error;
3394
3395 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
3396 if (error)
3397 return (error);
3398 *clpp = clp;
3399
3400 nmp = VFSTONFS(vp->v_mount);
3401 nfhp = VTONFS(vp)->n_fhp;
3402 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
3403 NFSLOCKCLSTATE();
3404 /*
3405 * First get rid of the local Open structures, which should be no
3406 * longer in use.
3407 */
3408 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3409 if (dp != NULL) {
3410 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
3411 op = LIST_FIRST(&owp->nfsow_open);
3412 if (op != NULL) {
3413 KASSERT((op->nfso_opencnt == 0),
3414 ("nfscl: bad open cnt on deleg"));
3415 nfscl_freeopen(op, 1, true);
3416 }
3417 nfscl_freeopenowner(owp, 1);
3418 }
3419 }
3420
3421 /* Return any layouts marked return on close. */
3422 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp,
3423 &lyp);
3424
3425 /* Now process the opens against the server. */
3426 LIST_INIT(&delayed);
3427 lookformore:
3428 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
3429 nfso_hash) {
3430 if (op->nfso_fhlen == nfhp->nfh_len &&
3431 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3432 nfhp->nfh_len)) {
3433 /* Found an open, close it. */
3434 #ifdef DIAGNOSTIC
3435 KASSERT((op->nfso_opencnt == 0),
3436 ("nfscl: bad open cnt on server (%d)",
3437 op->nfso_opencnt));
3438 #endif
3439 NFSUNLOCKCLSTATE();
3440 if (NFSHASNFSV4N(nmp))
3441 error = nfsrpc_doclose(nmp, op, p, false, true);
3442 else
3443 error = nfsrpc_doclose(nmp, op, p, true, true);
3444 NFSLOCKCLSTATE();
3445 if (error == NFSERR_DELAY) {
3446 nfscl_unlinkopen(op);
3447 op->nfso_own = NULL;
3448 LIST_INSERT_HEAD(&delayed, op, nfso_list);
3449 }
3450 goto lookformore;
3451 }
3452 }
3453 nfscl_clrelease(clp);
3454
3455 /* Now, wait for any layout that is returned upon close. */
3456 if (lyp != NULL) {
3457 while ((lyp->nfsly_flags & NFSLY_RETURNED) == 0) {
3458 if (NFSCL_FORCEDISM(nmp->nm_mountp)) {
3459 lyp = NULL;
3460 break;
3461 }
3462 msleep(lyp, NFSCLSTATEMUTEXPTR, PZERO, "nfslroc", hz);
3463 }
3464 if (lyp != NULL)
3465 nfscl_freelayout(lyp);
3466 }
3467
3468 NFSUNLOCKCLSTATE();
3469 /*
3470 * recallp has been set NULL by nfscl_retoncloselayout() if it was
3471 * used by the function, but calling free() with a NULL pointer is ok.
3472 */
3473 free(recallp, M_NFSLAYRECALL);
3474
3475 /* Now, loop retrying the delayed closes. */
3476 LIST_FOREACH_SAFE(op, &delayed, nfso_list, nop) {
3477 nfsrpc_doclose(nmp, op, p, true, false);
3478 LIST_REMOVE(op, nfso_list);
3479 nfscl_freeopen(op, 0, false);
3480 }
3481 return (0);
3482 }
3483
3484 /*
3485 * Return all delegations on this client.
3486 * (Must be called with client sleep lock.)
3487 */
3488 static void
nfscl_delegreturnall(struct nfsclclient * clp,NFSPROC_T * p,struct nfscldeleghead * dhp)3489 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p,
3490 struct nfscldeleghead *dhp)
3491 {
3492 struct nfscldeleg *dp, *ndp;
3493 struct ucred *cred;
3494
3495 cred = newnfs_getcred();
3496 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3497 nfscl_cleandeleg(dp);
3498 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3499 if (dhp != NULL) {
3500 nfscl_freedeleg(&clp->nfsc_deleg, dp, false);
3501 TAILQ_INSERT_HEAD(dhp, dp, nfsdl_list);
3502 } else
3503 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
3504 }
3505 NFSFREECRED(cred);
3506 }
3507
3508 /*
3509 * Return any delegation for this vp.
3510 */
3511 void
nfscl_delegreturnvp(vnode_t vp,NFSPROC_T * p)3512 nfscl_delegreturnvp(vnode_t vp, NFSPROC_T *p)
3513 {
3514 struct nfsclclient *clp;
3515 struct nfscldeleg *dp;
3516 struct ucred *cred;
3517 struct nfsnode *np;
3518 struct nfsmount *nmp;
3519
3520 nmp = VFSTONFS(vp->v_mount);
3521 NFSLOCKMNT(nmp);
3522 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
3523 NFSUNLOCKMNT(nmp);
3524 return;
3525 }
3526 NFSUNLOCKMNT(nmp);
3527 np = VTONFS(vp);
3528 cred = newnfs_getcred();
3529 dp = NULL;
3530 NFSLOCKCLSTATE();
3531 clp = nmp->nm_clp;
3532 if (clp != NULL)
3533 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
3534 np->n_fhp->nfh_len);
3535 if (dp != NULL) {
3536 nfscl_cleandeleg(dp);
3537 nfscl_freedeleg(&clp->nfsc_deleg, dp, false);
3538 NFSUNLOCKCLSTATE();
3539 newnfs_copycred(&dp->nfsdl_cred, cred);
3540 nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3541 free(dp, M_NFSCLDELEG);
3542 } else
3543 NFSUNLOCKCLSTATE();
3544 NFSFREECRED(cred);
3545 }
3546
3547 /*
3548 * Do a callback RPC.
3549 */
3550 void
nfscl_docb(struct nfsrv_descript * nd,NFSPROC_T * p)3551 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3552 {
3553 int clist, gotseq_ok, i, j, k, op, rcalls;
3554 u_int32_t *tl;
3555 struct nfsclclient *clp;
3556 struct nfscldeleg *dp = NULL;
3557 int numops, taglen = -1, error = 0, trunc __unused;
3558 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
3559 u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3560 vnode_t vp = NULL;
3561 struct nfsnode *np;
3562 struct vattr va;
3563 struct nfsfh *nfhp;
3564 mount_t mp;
3565 nfsattrbit_t attrbits, rattrbits;
3566 nfsv4stateid_t stateid;
3567 uint32_t seqid, slotid = 0, highslot, cachethis __unused;
3568 uint8_t sessionid[NFSX_V4SESSIONID];
3569 struct mbuf *rep;
3570 struct nfscllayout *lyp;
3571 uint64_t filesid[2], len, off;
3572 int changed, gotone, laytype, recalltype;
3573 uint32_t iomode;
3574 struct nfsclrecalllayout *recallp = NULL;
3575 struct nfsclsession *tsep;
3576
3577 gotseq_ok = 0;
3578 nfsrvd_rephead(nd);
3579 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3580 taglen = fxdr_unsigned(int, *tl);
3581 if (taglen < 0 || taglen > NFSV4_OPAQUELIMIT) {
3582 error = EBADRPC;
3583 taglen = -1;
3584 goto nfsmout;
3585 }
3586 if (taglen <= NFSV4_SMALLSTR)
3587 tagstr = tag;
3588 else
3589 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3590 error = nfsrv_mtostr(nd, tagstr, taglen);
3591 if (error) {
3592 if (taglen > NFSV4_SMALLSTR)
3593 free(tagstr, M_TEMP);
3594 taglen = -1;
3595 goto nfsmout;
3596 }
3597 (void) nfsm_strtom(nd, tag, taglen);
3598 if (taglen > NFSV4_SMALLSTR) {
3599 free(tagstr, M_TEMP);
3600 }
3601 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3602 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3603 minorvers = fxdr_unsigned(u_int32_t, *tl++);
3604 if (minorvers != NFSV4_MINORVERSION &&
3605 minorvers != NFSV41_MINORVERSION &&
3606 minorvers != NFSV42_MINORVERSION)
3607 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3608 cbident = fxdr_unsigned(u_int32_t, *tl++);
3609 if (nd->nd_repstat)
3610 numops = 0;
3611 else
3612 numops = fxdr_unsigned(int, *tl);
3613 /*
3614 * Loop around doing the sub ops.
3615 */
3616 for (i = 0; i < numops; i++) {
3617 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3618 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3619 *repp++ = *tl;
3620 op = fxdr_unsigned(int, *tl);
3621 nd->nd_procnum = op;
3622 if (i == 0 && op != NFSV4OP_CBSEQUENCE && minorvers !=
3623 NFSV4_MINORVERSION) {
3624 nd->nd_repstat = NFSERR_OPNOTINSESS;
3625 *repp = nfscl_errmap(nd, minorvers);
3626 retops++;
3627 break;
3628 }
3629 if (op < NFSV4OP_CBGETATTR ||
3630 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
3631 (op > NFSV4OP_CBNOTIFYDEVID &&
3632 minorvers == NFSV41_MINORVERSION) ||
3633 (op > NFSV4OP_CBOFFLOAD &&
3634 minorvers == NFSV42_MINORVERSION)) {
3635 nd->nd_repstat = NFSERR_OPILLEGAL;
3636 *repp = nfscl_errmap(nd, minorvers);
3637 retops++;
3638 break;
3639 }
3640 if (op < NFSV42_CBNOPS)
3641 nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
3642 switch (op) {
3643 case NFSV4OP_CBGETATTR:
3644 NFSCL_DEBUG(4, "cbgetattr\n");
3645 mp = NULL;
3646 vp = NULL;
3647 error = nfsm_getfh(nd, &nfhp);
3648 if (!error)
3649 error = nfsrv_getattrbits(nd, &attrbits,
3650 NULL, NULL);
3651 if (!error) {
3652 mp = nfscl_getmnt(minorvers, sessionid, cbident,
3653 &clp);
3654 if (mp == NULL)
3655 error = NFSERR_SERVERFAULT;
3656 }
3657 if (!error) {
3658 error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3659 nfhp->nfh_len, p, &np);
3660 if (!error)
3661 vp = NFSTOV(np);
3662 }
3663 if (!error) {
3664 NFSZERO_ATTRBIT(&rattrbits);
3665 NFSLOCKCLSTATE();
3666 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3667 nfhp->nfh_len);
3668 if (dp != NULL) {
3669 if (NFSISSET_ATTRBIT(&attrbits,
3670 NFSATTRBIT_SIZE)) {
3671 if (vp != NULL)
3672 va.va_size = np->n_size;
3673 else
3674 va.va_size =
3675 dp->nfsdl_size;
3676 NFSSETBIT_ATTRBIT(&rattrbits,
3677 NFSATTRBIT_SIZE);
3678 }
3679 if (NFSISSET_ATTRBIT(&attrbits,
3680 NFSATTRBIT_CHANGE)) {
3681 va.va_filerev =
3682 dp->nfsdl_change;
3683 if (vp == NULL ||
3684 (np->n_flag & NDELEGMOD))
3685 va.va_filerev++;
3686 NFSSETBIT_ATTRBIT(&rattrbits,
3687 NFSATTRBIT_CHANGE);
3688 }
3689 } else
3690 error = NFSERR_SERVERFAULT;
3691 NFSUNLOCKCLSTATE();
3692 }
3693 if (vp != NULL)
3694 vrele(vp);
3695 if (mp != NULL)
3696 vfs_unbusy(mp);
3697 if (nfhp != NULL)
3698 free(nfhp, M_NFSFH);
3699 if (!error)
3700 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3701 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
3702 (uint64_t)0, NULL);
3703 break;
3704 case NFSV4OP_CBRECALL:
3705 NFSCL_DEBUG(4, "cbrecall\n");
3706 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3707 NFSX_UNSIGNED);
3708 stateid.seqid = *tl++;
3709 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3710 NFSX_STATEIDOTHER);
3711 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3712 trunc = fxdr_unsigned(int, *tl);
3713 error = nfsm_getfh(nd, &nfhp);
3714 if (!error) {
3715 NFSLOCKCLSTATE();
3716 if (minorvers == NFSV4_MINORVERSION)
3717 clp = nfscl_getclnt(cbident);
3718 else
3719 clp = nfscl_getclntsess(sessionid);
3720 if (clp != NULL) {
3721 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3722 nfhp->nfh_len);
3723 if (dp != NULL && (dp->nfsdl_flags &
3724 NFSCLDL_DELEGRET) == 0) {
3725 dp->nfsdl_flags |=
3726 NFSCLDL_RECALL;
3727 wakeup((caddr_t)clp);
3728 }
3729 } else {
3730 error = NFSERR_SERVERFAULT;
3731 }
3732 NFSUNLOCKCLSTATE();
3733 }
3734 if (nfhp != NULL)
3735 free(nfhp, M_NFSFH);
3736 break;
3737 case NFSV4OP_CBLAYOUTRECALL:
3738 NFSCL_DEBUG(4, "cblayrec\n");
3739 nfhp = NULL;
3740 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
3741 laytype = fxdr_unsigned(int, *tl++);
3742 iomode = fxdr_unsigned(uint32_t, *tl++);
3743 if (newnfs_true == *tl++)
3744 changed = 1;
3745 else
3746 changed = 0;
3747 recalltype = fxdr_unsigned(int, *tl);
3748 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n",
3749 laytype, iomode, changed, recalltype);
3750 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
3751 M_WAITOK);
3752 if (laytype != NFSLAYOUT_NFSV4_1_FILES &&
3753 laytype != NFSLAYOUT_FLEXFILE)
3754 error = NFSERR_NOMATCHLAYOUT;
3755 else if (recalltype == NFSLAYOUTRETURN_FILE) {
3756 error = nfsm_getfh(nd, &nfhp);
3757 NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
3758 if (error != 0)
3759 goto nfsmout;
3760 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
3761 NFSX_STATEID);
3762 off = fxdr_hyper(tl); tl += 2;
3763 len = fxdr_hyper(tl); tl += 2;
3764 stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
3765 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
3766 if (minorvers == NFSV4_MINORVERSION)
3767 error = NFSERR_NOTSUPP;
3768 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n",
3769 (uintmax_t)off, (uintmax_t)len,
3770 stateid.seqid, error);
3771 if (error == 0) {
3772 NFSLOCKCLSTATE();
3773 clp = nfscl_getclntsess(sessionid);
3774 NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
3775 if (clp != NULL) {
3776 lyp = nfscl_findlayout(clp,
3777 nfhp->nfh_fh,
3778 nfhp->nfh_len);
3779 NFSCL_DEBUG(4, "cblyp=%p\n",
3780 lyp);
3781 if (lyp != NULL &&
3782 (lyp->nfsly_flags &
3783 (NFSLY_FILES |
3784 NFSLY_FLEXFILE)) != 0 &&
3785 !NFSBCMP(stateid.other,
3786 lyp->nfsly_stateid.other,
3787 NFSX_STATEIDOTHER)) {
3788 error =
3789 nfscl_layoutrecall(
3790 recalltype,
3791 lyp, iomode, off,
3792 len, stateid.seqid,
3793 0, 0, NULL,
3794 recallp);
3795 if (error == 0 &&
3796 stateid.seqid >
3797 lyp->nfsly_stateid.seqid)
3798 lyp->nfsly_stateid.seqid =
3799 stateid.seqid;
3800 recallp = NULL;
3801 wakeup(clp);
3802 NFSCL_DEBUG(4,
3803 "aft layrcal=%d "
3804 "layseqid=%d\n",
3805 error,
3806 lyp->nfsly_stateid.seqid);
3807 } else
3808 error =
3809 NFSERR_NOMATCHLAYOUT;
3810 } else
3811 error = NFSERR_NOMATCHLAYOUT;
3812 NFSUNLOCKCLSTATE();
3813 }
3814 free(nfhp, M_NFSFH);
3815 } else if (recalltype == NFSLAYOUTRETURN_FSID) {
3816 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
3817 filesid[0] = fxdr_hyper(tl); tl += 2;
3818 filesid[1] = fxdr_hyper(tl); tl += 2;
3819 gotone = 0;
3820 NFSLOCKCLSTATE();
3821 clp = nfscl_getclntsess(sessionid);
3822 if (clp != NULL) {
3823 TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3824 nfsly_list) {
3825 if (lyp->nfsly_filesid[0] ==
3826 filesid[0] &&
3827 lyp->nfsly_filesid[1] ==
3828 filesid[1]) {
3829 error =
3830 nfscl_layoutrecall(
3831 recalltype,
3832 lyp, iomode, 0,
3833 UINT64_MAX,
3834 lyp->nfsly_stateid.seqid,
3835 0, 0, NULL,
3836 recallp);
3837 recallp = NULL;
3838 gotone = 1;
3839 }
3840 }
3841 if (gotone != 0)
3842 wakeup(clp);
3843 else
3844 error = NFSERR_NOMATCHLAYOUT;
3845 } else
3846 error = NFSERR_NOMATCHLAYOUT;
3847 NFSUNLOCKCLSTATE();
3848 } else if (recalltype == NFSLAYOUTRETURN_ALL) {
3849 gotone = 0;
3850 NFSLOCKCLSTATE();
3851 clp = nfscl_getclntsess(sessionid);
3852 if (clp != NULL) {
3853 TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3854 nfsly_list) {
3855 error = nfscl_layoutrecall(
3856 recalltype, lyp, iomode, 0,
3857 UINT64_MAX,
3858 lyp->nfsly_stateid.seqid,
3859 0, 0, NULL, recallp);
3860 recallp = NULL;
3861 gotone = 1;
3862 }
3863 if (gotone != 0)
3864 wakeup(clp);
3865 else
3866 error = NFSERR_NOMATCHLAYOUT;
3867 } else
3868 error = NFSERR_NOMATCHLAYOUT;
3869 NFSUNLOCKCLSTATE();
3870 } else
3871 error = NFSERR_NOMATCHLAYOUT;
3872 if (recallp != NULL) {
3873 free(recallp, M_NFSLAYRECALL);
3874 recallp = NULL;
3875 }
3876 break;
3877 case NFSV4OP_CBSEQUENCE:
3878 if (i != 0) {
3879 error = NFSERR_SEQUENCEPOS;
3880 break;
3881 }
3882 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3883 5 * NFSX_UNSIGNED);
3884 bcopy(tl, sessionid, NFSX_V4SESSIONID);
3885 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3886 seqid = fxdr_unsigned(uint32_t, *tl++);
3887 slotid = fxdr_unsigned(uint32_t, *tl++);
3888 highslot = fxdr_unsigned(uint32_t, *tl++);
3889 cachethis = *tl++;
3890 /* Throw away the referring call stuff. */
3891 clist = fxdr_unsigned(int, *tl);
3892 for (j = 0; j < clist; j++) {
3893 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3894 NFSX_UNSIGNED);
3895 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3896 rcalls = fxdr_unsigned(int, *tl);
3897 for (k = 0; k < rcalls; k++) {
3898 NFSM_DISSECT(tl, uint32_t *,
3899 2 * NFSX_UNSIGNED);
3900 }
3901 }
3902 NFSLOCKCLSTATE();
3903 clp = nfscl_getclntsess(sessionid);
3904 if (clp == NULL)
3905 error = NFSERR_SERVERFAULT;
3906 if (error == 0) {
3907 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3908 error = nfsv4_seqsession(seqid, slotid,
3909 highslot, tsep->nfsess_cbslots, &rep,
3910 tsep->nfsess_backslots);
3911 }
3912 NFSUNLOCKCLSTATE();
3913 if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
3914 gotseq_ok = 1;
3915 if (rep != NULL) {
3916 /*
3917 * Handle a reply for a retried
3918 * callback. The reply will be
3919 * re-inserted in the session cache
3920 * by the nfsv4_seqsess_cacherep() call
3921 * after out:
3922 */
3923 KASSERT(error == NFSERR_REPLYFROMCACHE,
3924 ("cbsequence: non-NULL rep"));
3925 NFSCL_DEBUG(4, "Got cbretry\n");
3926 m_freem(nd->nd_mreq);
3927 nd->nd_mreq = rep;
3928 rep = NULL;
3929 goto out;
3930 }
3931 NFSM_BUILD(tl, uint32_t *,
3932 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
3933 bcopy(sessionid, tl, NFSX_V4SESSIONID);
3934 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3935 *tl++ = txdr_unsigned(seqid);
3936 *tl++ = txdr_unsigned(slotid);
3937 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
3938 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
3939 }
3940 break;
3941 default:
3942 if (i == 0 && minorvers != NFSV4_MINORVERSION)
3943 error = NFSERR_OPNOTINSESS;
3944 else {
3945 NFSCL_DEBUG(1, "unsupp callback %d\n", op);
3946 error = NFSERR_NOTSUPP;
3947 }
3948 break;
3949 }
3950 if (error) {
3951 if (error == EBADRPC || error == NFSERR_BADXDR) {
3952 nd->nd_repstat = NFSERR_BADXDR;
3953 } else {
3954 nd->nd_repstat = error;
3955 }
3956 error = 0;
3957 }
3958 retops++;
3959 if (nd->nd_repstat) {
3960 *repp = nfscl_errmap(nd, minorvers);
3961 break;
3962 } else
3963 *repp = 0; /* NFS4_OK */
3964 }
3965 nfsmout:
3966 if (recallp != NULL)
3967 free(recallp, M_NFSLAYRECALL);
3968 if (error) {
3969 if (error == EBADRPC || error == NFSERR_BADXDR)
3970 nd->nd_repstat = NFSERR_BADXDR;
3971 else
3972 printf("nfsv4 comperr1=%d\n", error);
3973 }
3974 if (taglen == -1) {
3975 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3976 *tl++ = 0;
3977 *tl = 0;
3978 } else {
3979 *retopsp = txdr_unsigned(retops);
3980 }
3981 *nd->nd_errp = nfscl_errmap(nd, minorvers);
3982 out:
3983 if (gotseq_ok != 0) {
3984 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
3985 NFSLOCKCLSTATE();
3986 clp = nfscl_getclntsess(sessionid);
3987 if (clp != NULL) {
3988 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3989 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
3990 NFSERR_OK, &rep);
3991 NFSUNLOCKCLSTATE();
3992 } else {
3993 NFSUNLOCKCLSTATE();
3994 m_freem(rep);
3995 }
3996 }
3997 }
3998
3999 /*
4000 * Generate the next cbident value. Basically just increment a static value
4001 * and then check that it isn't already in the list, if it has wrapped around.
4002 */
4003 static u_int32_t
nfscl_nextcbident(void)4004 nfscl_nextcbident(void)
4005 {
4006 struct nfsclclient *clp;
4007 int matched;
4008 static u_int32_t nextcbident = 0;
4009 static int haswrapped = 0;
4010
4011 nextcbident++;
4012 if (nextcbident == 0)
4013 haswrapped = 1;
4014 if (haswrapped) {
4015 /*
4016 * Search the clientid list for one already using this cbident.
4017 */
4018 do {
4019 matched = 0;
4020 NFSLOCKCLSTATE();
4021 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4022 if (clp->nfsc_cbident == nextcbident) {
4023 matched = 1;
4024 break;
4025 }
4026 }
4027 NFSUNLOCKCLSTATE();
4028 if (matched == 1)
4029 nextcbident++;
4030 } while (matched);
4031 }
4032 return (nextcbident);
4033 }
4034
4035 /*
4036 * Get the mount point related to a given cbident or session and busy it.
4037 */
4038 static mount_t
nfscl_getmnt(int minorvers,uint8_t * sessionid,u_int32_t cbident,struct nfsclclient ** clpp)4039 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
4040 struct nfsclclient **clpp)
4041 {
4042 struct nfsclclient *clp;
4043 mount_t mp;
4044 int error;
4045 struct nfsclsession *tsep;
4046
4047 *clpp = NULL;
4048 NFSLOCKCLSTATE();
4049 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4050 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
4051 if (minorvers == NFSV4_MINORVERSION) {
4052 if (clp->nfsc_cbident == cbident)
4053 break;
4054 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
4055 NFSX_V4SESSIONID))
4056 break;
4057 }
4058 if (clp == NULL) {
4059 NFSUNLOCKCLSTATE();
4060 return (NULL);
4061 }
4062 mp = clp->nfsc_nmp->nm_mountp;
4063 vfs_ref(mp);
4064 NFSUNLOCKCLSTATE();
4065 error = vfs_busy(mp, 0);
4066 vfs_rel(mp);
4067 if (error != 0)
4068 return (NULL);
4069 *clpp = clp;
4070 return (mp);
4071 }
4072
4073 /*
4074 * Get the clientid pointer related to a given cbident.
4075 */
4076 static struct nfsclclient *
nfscl_getclnt(u_int32_t cbident)4077 nfscl_getclnt(u_int32_t cbident)
4078 {
4079 struct nfsclclient *clp;
4080
4081 LIST_FOREACH(clp, &nfsclhead, nfsc_list)
4082 if (clp->nfsc_cbident == cbident)
4083 break;
4084 return (clp);
4085 }
4086
4087 /*
4088 * Get the clientid pointer related to a given sessionid.
4089 */
4090 static struct nfsclclient *
nfscl_getclntsess(uint8_t * sessionid)4091 nfscl_getclntsess(uint8_t *sessionid)
4092 {
4093 struct nfsclclient *clp;
4094 struct nfsclsession *tsep;
4095
4096 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
4097 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
4098 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
4099 NFSX_V4SESSIONID))
4100 break;
4101 }
4102 return (clp);
4103 }
4104
4105 /*
4106 * Search for a lock conflict locally on the client. A conflict occurs if
4107 * - not same owner and overlapping byte range and at least one of them is
4108 * a write lock or this is an unlock.
4109 */
4110 static int
nfscl_localconflict(struct nfsclclient * clp,u_int8_t * fhp,int fhlen,struct nfscllock * nlop,u_int8_t * own,struct nfscldeleg * dp,struct nfscllock ** lopp)4111 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
4112 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
4113 struct nfscllock **lopp)
4114 {
4115 struct nfsclopen *op;
4116 int ret;
4117
4118 if (dp != NULL) {
4119 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
4120 if (ret)
4121 return (ret);
4122 }
4123 LIST_FOREACH(op, NFSCLOPENHASH(clp, fhp, fhlen), nfso_hash) {
4124 if (op->nfso_fhlen == fhlen &&
4125 !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
4126 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
4127 own, lopp);
4128 if (ret)
4129 return (ret);
4130 }
4131 }
4132 return (0);
4133 }
4134
4135 static int
nfscl_checkconflict(struct nfscllockownerhead * lhp,struct nfscllock * nlop,u_int8_t * own,struct nfscllock ** lopp)4136 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
4137 u_int8_t *own, struct nfscllock **lopp)
4138 {
4139 struct nfscllockowner *lp;
4140 struct nfscllock *lop;
4141
4142 LIST_FOREACH(lp, lhp, nfsl_list) {
4143 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
4144 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
4145 if (lop->nfslo_first >= nlop->nfslo_end)
4146 break;
4147 if (lop->nfslo_end <= nlop->nfslo_first)
4148 continue;
4149 if (lop->nfslo_type == F_WRLCK ||
4150 nlop->nfslo_type == F_WRLCK ||
4151 nlop->nfslo_type == F_UNLCK) {
4152 if (lopp != NULL)
4153 *lopp = lop;
4154 return (NFSERR_DENIED);
4155 }
4156 }
4157 }
4158 }
4159 return (0);
4160 }
4161
4162 /*
4163 * Check for a local conflicting lock.
4164 */
4165 int
nfscl_lockt(vnode_t vp,struct nfsclclient * clp,u_int64_t off,u_int64_t len,struct flock * fl,NFSPROC_T * p,void * id,int flags)4166 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
4167 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
4168 {
4169 struct nfscllock *lop, nlck;
4170 struct nfscldeleg *dp;
4171 struct nfsnode *np;
4172 u_int8_t own[NFSV4CL_LOCKNAMELEN];
4173 int error;
4174
4175 nlck.nfslo_type = fl->l_type;
4176 nlck.nfslo_first = off;
4177 if (len == NFS64BITSSET) {
4178 nlck.nfslo_end = NFS64BITSSET;
4179 } else {
4180 nlck.nfslo_end = off + len;
4181 if (nlck.nfslo_end <= nlck.nfslo_first)
4182 return (NFSERR_INVAL);
4183 }
4184 np = VTONFS(vp);
4185 nfscl_filllockowner(id, own, flags);
4186 NFSLOCKCLSTATE();
4187 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4188 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
4189 &nlck, own, dp, &lop);
4190 if (error != 0) {
4191 fl->l_whence = SEEK_SET;
4192 fl->l_start = lop->nfslo_first;
4193 if (lop->nfslo_end == NFS64BITSSET)
4194 fl->l_len = 0;
4195 else
4196 fl->l_len = lop->nfslo_end - lop->nfslo_first;
4197 fl->l_pid = (pid_t)0;
4198 fl->l_type = lop->nfslo_type;
4199 error = -1; /* no RPC required */
4200 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
4201 fl->l_type == F_RDLCK)) {
4202 /*
4203 * The delegation ensures that there isn't a conflicting
4204 * lock on the server, so return -1 to indicate an RPC
4205 * isn't required.
4206 */
4207 fl->l_type = F_UNLCK;
4208 error = -1;
4209 }
4210 NFSUNLOCKCLSTATE();
4211 return (error);
4212 }
4213
4214 /*
4215 * Handle Recall of a delegation.
4216 * The clp must be exclusive locked when this is called.
4217 */
4218 static int
nfscl_recalldeleg(struct nfsclclient * clp,struct nfsmount * nmp,struct nfscldeleg * dp,vnode_t vp,struct ucred * cred,NFSPROC_T * p,int called_from_renewthread,vnode_t * vpp)4219 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
4220 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
4221 int called_from_renewthread, vnode_t *vpp)
4222 {
4223 struct nfsclowner *owp, *lowp, *nowp;
4224 struct nfsclopen *op, *lop;
4225 struct nfscllockowner *lp;
4226 struct nfscllock *lckp;
4227 struct nfsnode *np;
4228 int error = 0, ret;
4229
4230 if (vp == NULL) {
4231 KASSERT(vpp != NULL, ("nfscl_recalldeleg: vpp NULL"));
4232 *vpp = NULL;
4233 /*
4234 * First, get a vnode for the file. This is needed to do RPCs.
4235 */
4236 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
4237 dp->nfsdl_fhlen, p, &np);
4238 if (ret) {
4239 /*
4240 * File isn't open, so nothing to move over to the
4241 * server.
4242 */
4243 return (0);
4244 }
4245 vp = NFSTOV(np);
4246 *vpp = vp;
4247 } else {
4248 np = VTONFS(vp);
4249 }
4250 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
4251
4252 /*
4253 * Ok, if it's a write delegation, flush data to the server, so
4254 * that close/open consistency is retained.
4255 */
4256 ret = 0;
4257 NFSLOCKNODE(np);
4258 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
4259 np->n_flag |= NDELEGRECALL;
4260 NFSUNLOCKNODE(np);
4261 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
4262 NFSLOCKNODE(np);
4263 np->n_flag &= ~NDELEGRECALL;
4264 }
4265 NFSINVALATTRCACHE(np);
4266 NFSUNLOCKNODE(np);
4267 if (ret == EIO && called_from_renewthread != 0) {
4268 /*
4269 * If the flush failed with EIO for the renew thread,
4270 * return now, so that the dirty buffer will be flushed
4271 * later.
4272 */
4273 return (ret);
4274 }
4275
4276 /*
4277 * Now, for each openowner with opens issued locally, move them
4278 * over to state against the server.
4279 */
4280 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
4281 lop = LIST_FIRST(&lowp->nfsow_open);
4282 if (lop != NULL) {
4283 if (LIST_NEXT(lop, nfso_list) != NULL)
4284 panic("nfsdlg mult opens");
4285 /*
4286 * Look for the same openowner against the server.
4287 */
4288 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
4289 if (!NFSBCMP(lowp->nfsow_owner,
4290 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
4291 newnfs_copycred(&dp->nfsdl_cred, cred);
4292 ret = nfscl_moveopen(vp, clp, nmp, lop,
4293 owp, dp, cred, p);
4294 if (ret == NFSERR_STALECLIENTID ||
4295 ret == NFSERR_STALEDONTRECOVER ||
4296 ret == NFSERR_BADSESSION)
4297 return (ret);
4298 if (ret) {
4299 nfscl_freeopen(lop, 1, true);
4300 if (!error)
4301 error = ret;
4302 }
4303 break;
4304 }
4305 }
4306
4307 /*
4308 * If no openowner found, create one and get an open
4309 * for it.
4310 */
4311 if (owp == NULL) {
4312 nowp = malloc(
4313 sizeof (struct nfsclowner), M_NFSCLOWNER,
4314 M_WAITOK);
4315 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
4316 NULL, lowp->nfsow_owner, dp->nfsdl_fh,
4317 dp->nfsdl_fhlen, NULL, NULL);
4318 newnfs_copycred(&dp->nfsdl_cred, cred);
4319 ret = nfscl_moveopen(vp, clp, nmp, lop,
4320 owp, dp, cred, p);
4321 if (ret) {
4322 nfscl_freeopenowner(owp, 0);
4323 if (ret == NFSERR_STALECLIENTID ||
4324 ret == NFSERR_STALEDONTRECOVER ||
4325 ret == NFSERR_BADSESSION)
4326 return (ret);
4327 if (ret) {
4328 nfscl_freeopen(lop, 1, true);
4329 if (!error)
4330 error = ret;
4331 }
4332 }
4333 }
4334 }
4335 }
4336
4337 /*
4338 * Now, get byte range locks for any locks done locally.
4339 */
4340 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4341 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
4342 newnfs_copycred(&dp->nfsdl_cred, cred);
4343 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
4344 if (ret == NFSERR_STALESTATEID ||
4345 ret == NFSERR_STALEDONTRECOVER ||
4346 ret == NFSERR_STALECLIENTID ||
4347 ret == NFSERR_BADSESSION)
4348 return (ret);
4349 if (ret && !error)
4350 error = ret;
4351 }
4352 }
4353 return (error);
4354 }
4355
4356 /*
4357 * Move a locally issued open over to an owner on the state list.
4358 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
4359 * returns with it unlocked.
4360 */
4361 static int
nfscl_moveopen(vnode_t vp,struct nfsclclient * clp,struct nfsmount * nmp,struct nfsclopen * lop,struct nfsclowner * owp,struct nfscldeleg * dp,struct ucred * cred,NFSPROC_T * p)4362 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4363 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
4364 struct ucred *cred, NFSPROC_T *p)
4365 {
4366 struct nfsclopen *op, *nop;
4367 struct nfscldeleg *ndp;
4368 struct nfsnode *np;
4369 int error = 0, newone;
4370
4371 /*
4372 * First, look for an appropriate open, If found, just increment the
4373 * opencnt in it.
4374 */
4375 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
4376 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
4377 op->nfso_fhlen == lop->nfso_fhlen &&
4378 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
4379 op->nfso_opencnt += lop->nfso_opencnt;
4380 nfscl_freeopen(lop, 1, true);
4381 return (0);
4382 }
4383 }
4384
4385 /* No appropriate open, so we have to do one against the server. */
4386 np = VTONFS(vp);
4387 nop = malloc(sizeof (struct nfsclopen) +
4388 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
4389 nop->nfso_hash.le_prev = NULL;
4390 newone = 0;
4391 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
4392 lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
4393 ndp = dp;
4394 if (NFSHASNFSV4N(nmp))
4395 error = nfscl_tryopen(nmp, vp, lop->nfso_fh, lop->nfso_fhlen,
4396 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
4397 NULL, 0, &ndp, 0, 0, cred, p);
4398 else
4399 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4400 np->n_v4->n4_fhlen, lop->nfso_fh, lop->nfso_fhlen,
4401 lop->nfso_mode, op, NFS4NODENAME(np->n_v4),
4402 np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
4403 if (error) {
4404 if (newone)
4405 nfscl_freeopen(op, 0, true);
4406 } else {
4407 op->nfso_mode |= lop->nfso_mode;
4408 op->nfso_opencnt += lop->nfso_opencnt;
4409 nfscl_freeopen(lop, 1, true);
4410 }
4411 if (nop != NULL)
4412 free(nop, M_NFSCLOPEN);
4413 if (ndp != NULL) {
4414 /*
4415 * What should I do with the returned delegation, since the
4416 * delegation is being recalled? For now, just printf and
4417 * through it away.
4418 */
4419 printf("Moveopen returned deleg\n");
4420 free(ndp, M_NFSCLDELEG);
4421 }
4422 return (error);
4423 }
4424
4425 /*
4426 * Recall all delegations on this client.
4427 */
4428 static void
nfscl_totalrecall(struct nfsclclient * clp)4429 nfscl_totalrecall(struct nfsclclient *clp)
4430 {
4431 struct nfscldeleg *dp;
4432
4433 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
4434 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
4435 dp->nfsdl_flags |= NFSCLDL_RECALL;
4436 }
4437 }
4438
4439 /*
4440 * Relock byte ranges. Called for delegation recall and state expiry.
4441 */
4442 static int
nfscl_relock(vnode_t vp,struct nfsclclient * clp,struct nfsmount * nmp,struct nfscllockowner * lp,struct nfscllock * lop,struct ucred * cred,NFSPROC_T * p)4443 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4444 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
4445 NFSPROC_T *p)
4446 {
4447 struct nfscllockowner *nlp;
4448 struct nfsfh *nfhp;
4449 struct nfsnode *np;
4450 u_int64_t off, len;
4451 int error, newone, donelocally;
4452
4453 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
4454 np = VTONFS(vp);
4455 NFSLOCKNODE(np);
4456 np->n_flag |= NMIGHTBELOCKED;
4457 NFSUNLOCKNODE(np);
4458 }
4459
4460 off = lop->nfslo_first;
4461 len = lop->nfslo_end - lop->nfslo_first;
4462 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
4463 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
4464 lp->nfsl_openowner, &nlp, &newone, &donelocally);
4465 if (error || donelocally)
4466 return (error);
4467 nfhp = VTONFS(vp)->n_fhp;
4468 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
4469 nfhp->nfh_len, nlp, newone, 0, off,
4470 len, lop->nfslo_type, cred, p);
4471 if (error)
4472 nfscl_freelockowner(nlp, 0);
4473 return (error);
4474 }
4475
4476 /*
4477 * Called to re-open a file. Basically get a vnode for the file handle
4478 * and then call nfsrpc_openrpc() to do the rest.
4479 */
4480 static int
nfsrpc_reopen(struct nfsmount * nmp,u_int8_t * fhp,int fhlen,u_int32_t mode,struct nfsclopen * op,struct nfscldeleg ** dpp,struct ucred * cred,NFSPROC_T * p)4481 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
4482 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
4483 struct ucred *cred, NFSPROC_T *p)
4484 {
4485 struct nfsnode *np;
4486 vnode_t vp;
4487 int error;
4488
4489 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
4490 if (error)
4491 return (error);
4492 vp = NFSTOV(np);
4493 if (NFSHASNFSV4N(nmp))
4494 error = nfscl_tryopen(nmp, vp, fhp, fhlen, fhp, fhlen, mode, op,
4495 NULL, 0, dpp, 0, 0, cred, p);
4496 else if (np->n_v4 != NULL)
4497 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4498 np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
4499 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
4500 cred, p);
4501 else
4502 error = EINVAL;
4503 vrele(vp);
4504 return (error);
4505 }
4506
4507 /*
4508 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
4509 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
4510 * fail.
4511 */
4512 static int
nfscl_tryopen(struct nfsmount * nmp,vnode_t vp,u_int8_t * fhp,int fhlen,u_int8_t * newfhp,int newfhlen,u_int32_t mode,struct nfsclopen * op,u_int8_t * name,int namelen,struct nfscldeleg ** ndpp,int reclaim,u_int32_t delegtype,struct ucred * cred,NFSPROC_T * p)4513 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4514 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
4515 u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
4516 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
4517 {
4518 int error;
4519 struct nfscldeleg *dp;
4520
4521 dp = *ndpp;
4522 do {
4523 *ndpp = dp; /* *ndpp needs to be set for retries. */
4524 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
4525 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
4526 0, 0);
4527 if (error == NFSERR_DELAY)
4528 (void) nfs_catnap(PZERO, error, "nfstryop");
4529 } while (error == NFSERR_DELAY);
4530 if (error == EAUTH || error == EACCES) {
4531 /* Try again using system credentials */
4532 newnfs_setroot(cred);
4533 do {
4534 *ndpp = dp; /* *ndpp needs to be set for retries. */
4535 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
4536 newfhlen, mode, op, name, namelen, ndpp, reclaim,
4537 delegtype, cred, p, 1, 0);
4538 if (error == NFSERR_DELAY)
4539 (void) nfs_catnap(PZERO, error, "nfstryop");
4540 } while (error == NFSERR_DELAY);
4541 }
4542 return (error);
4543 }
4544
4545 /*
4546 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
4547 * NFSERR_DELAY. Also, retry with system credentials, if the provided
4548 * cred don't work.
4549 */
4550 static int
nfscl_trylock(struct nfsmount * nmp,vnode_t vp,u_int8_t * fhp,int fhlen,struct nfscllockowner * nlp,int newone,int reclaim,u_int64_t off,u_int64_t len,short type,struct ucred * cred,NFSPROC_T * p)4551 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
4552 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
4553 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
4554 {
4555 struct nfsrv_descript nfsd, *nd = &nfsd;
4556 int error;
4557
4558 do {
4559 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
4560 reclaim, off, len, type, cred, p, 0);
4561 if (!error && nd->nd_repstat == NFSERR_DELAY)
4562 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4563 "nfstrylck");
4564 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4565 if (!error)
4566 error = nd->nd_repstat;
4567 if (error == EAUTH || error == EACCES) {
4568 /* Try again using root credentials */
4569 newnfs_setroot(cred);
4570 do {
4571 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
4572 newone, reclaim, off, len, type, cred, p, 1);
4573 if (!error && nd->nd_repstat == NFSERR_DELAY)
4574 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4575 "nfstrylck");
4576 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4577 if (!error)
4578 error = nd->nd_repstat;
4579 }
4580 return (error);
4581 }
4582
4583 /*
4584 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
4585 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4586 * credentials fail.
4587 */
4588 int
nfscl_trydelegreturn(struct nfscldeleg * dp,struct ucred * cred,struct nfsmount * nmp,NFSPROC_T * p)4589 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
4590 struct nfsmount *nmp, NFSPROC_T *p)
4591 {
4592 int error;
4593
4594 do {
4595 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
4596 if (error == NFSERR_DELAY)
4597 (void) nfs_catnap(PZERO, error, "nfstrydp");
4598 } while (error == NFSERR_DELAY);
4599 if (error == EAUTH || error == EACCES) {
4600 /* Try again using system credentials */
4601 newnfs_setroot(cred);
4602 do {
4603 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
4604 if (error == NFSERR_DELAY)
4605 (void) nfs_catnap(PZERO, error, "nfstrydp");
4606 } while (error == NFSERR_DELAY);
4607 }
4608 return (error);
4609 }
4610
4611 /*
4612 * Try a close against the server. Just call nfsrpc_closerpc(),
4613 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4614 * credentials fail.
4615 */
4616 int
nfscl_tryclose(struct nfsclopen * op,struct ucred * cred,struct nfsmount * nmp,NFSPROC_T * p,bool loop_on_delayed)4617 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
4618 struct nfsmount *nmp, NFSPROC_T *p, bool loop_on_delayed)
4619 {
4620 struct nfsrv_descript nfsd, *nd = &nfsd;
4621 int error;
4622
4623 do {
4624 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
4625 if (loop_on_delayed && error == NFSERR_DELAY)
4626 (void) nfs_catnap(PZERO, error, "nfstrycl");
4627 } while (loop_on_delayed && error == NFSERR_DELAY);
4628 if (error == EAUTH || error == EACCES) {
4629 /* Try again using system credentials */
4630 newnfs_setroot(cred);
4631 do {
4632 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
4633 if (loop_on_delayed && error == NFSERR_DELAY)
4634 (void) nfs_catnap(PZERO, error, "nfstrycl");
4635 } while (loop_on_delayed && error == NFSERR_DELAY);
4636 }
4637 return (error);
4638 }
4639
4640 /*
4641 * Decide if a delegation on a file permits close without flushing writes
4642 * to the server. This might be a big performance win in some environments.
4643 * (Not useful until the client does caching on local stable storage.)
4644 */
4645 int
nfscl_mustflush(vnode_t vp)4646 nfscl_mustflush(vnode_t vp)
4647 {
4648 struct nfsclclient *clp;
4649 struct nfscldeleg *dp;
4650 struct nfsnode *np;
4651 struct nfsmount *nmp;
4652
4653 np = VTONFS(vp);
4654 nmp = VFSTONFS(vp->v_mount);
4655 if (!NFSHASNFSV4(nmp) || vp->v_type != VREG)
4656 return (1);
4657 NFSLOCKMNT(nmp);
4658 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4659 NFSUNLOCKMNT(nmp);
4660 return (1);
4661 }
4662 NFSUNLOCKMNT(nmp);
4663 NFSLOCKCLSTATE();
4664 clp = nfscl_findcl(nmp);
4665 if (clp == NULL) {
4666 NFSUNLOCKCLSTATE();
4667 return (1);
4668 }
4669 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4670 if (dp != NULL && (dp->nfsdl_flags &
4671 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
4672 NFSCLDL_WRITE &&
4673 (dp->nfsdl_sizelimit >= np->n_size ||
4674 !NFSHASSTRICT3530(nmp))) {
4675 NFSUNLOCKCLSTATE();
4676 return (0);
4677 }
4678 NFSUNLOCKCLSTATE();
4679 return (1);
4680 }
4681
4682 /*
4683 * See if a (write) delegation exists for this file.
4684 */
4685 int
nfscl_nodeleg(vnode_t vp,int writedeleg)4686 nfscl_nodeleg(vnode_t vp, int writedeleg)
4687 {
4688 struct nfsclclient *clp;
4689 struct nfscldeleg *dp;
4690 struct nfsnode *np;
4691 struct nfsmount *nmp;
4692
4693 np = VTONFS(vp);
4694 nmp = VFSTONFS(vp->v_mount);
4695 if (!NFSHASNFSV4(nmp) || vp->v_type != VREG)
4696 return (1);
4697 NFSLOCKMNT(nmp);
4698 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4699 NFSUNLOCKMNT(nmp);
4700 return (1);
4701 }
4702 NFSUNLOCKMNT(nmp);
4703 NFSLOCKCLSTATE();
4704 clp = nfscl_findcl(nmp);
4705 if (clp == NULL) {
4706 NFSUNLOCKCLSTATE();
4707 return (1);
4708 }
4709 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4710 if (dp != NULL &&
4711 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
4712 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
4713 NFSCLDL_WRITE)) {
4714 NFSUNLOCKCLSTATE();
4715 return (0);
4716 }
4717 NFSUNLOCKCLSTATE();
4718 return (1);
4719 }
4720
4721 /*
4722 * Look for an associated delegation that should be DelegReturned.
4723 */
4724 int
nfscl_removedeleg(vnode_t vp,NFSPROC_T * p,nfsv4stateid_t * stp)4725 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
4726 {
4727 struct nfsclclient *clp;
4728 struct nfscldeleg *dp;
4729 struct nfsclowner *owp;
4730 struct nfscllockowner *lp;
4731 struct nfsmount *nmp;
4732 struct mount *mp;
4733 struct ucred *cred;
4734 struct nfsnode *np;
4735 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4736
4737 nmp = VFSTONFS(vp->v_mount);
4738 if (NFSHASPNFS(nmp))
4739 return (retcnt);
4740 NFSLOCKMNT(nmp);
4741 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4742 NFSUNLOCKMNT(nmp);
4743 return (retcnt);
4744 }
4745 NFSUNLOCKMNT(nmp);
4746 np = VTONFS(vp);
4747 mp = nmp->nm_mountp;
4748 NFSLOCKCLSTATE();
4749 /*
4750 * Loop around waiting for:
4751 * - outstanding I/O operations on delegations to complete
4752 * - for a delegation on vp that has state, lock the client and
4753 * do a recall
4754 * - return delegation with no state
4755 */
4756 while (1) {
4757 clp = nfscl_findcl(nmp);
4758 if (clp == NULL) {
4759 NFSUNLOCKCLSTATE();
4760 return (retcnt);
4761 }
4762 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4763 np->n_fhp->nfh_len);
4764 if (dp != NULL) {
4765 /*
4766 * Wait for outstanding I/O ops to be done.
4767 */
4768 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4769 if (igotlock) {
4770 nfsv4_unlock(&clp->nfsc_lock, 0);
4771 igotlock = 0;
4772 }
4773 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4774 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4775 "nfscld", hz);
4776 if (NFSCL_FORCEDISM(mp)) {
4777 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4778 NFSUNLOCKCLSTATE();
4779 return (0);
4780 }
4781 continue;
4782 }
4783 needsrecall = 0;
4784 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4785 if (!LIST_EMPTY(&owp->nfsow_open)) {
4786 needsrecall = 1;
4787 break;
4788 }
4789 }
4790 if (!needsrecall) {
4791 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4792 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4793 needsrecall = 1;
4794 break;
4795 }
4796 }
4797 }
4798 if (needsrecall && !triedrecall) {
4799 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4800 islept = 0;
4801 while (!igotlock) {
4802 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4803 &islept, NFSCLSTATEMUTEXPTR, mp);
4804 if (NFSCL_FORCEDISM(mp)) {
4805 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4806 if (igotlock)
4807 nfsv4_unlock(&clp->nfsc_lock, 0);
4808 NFSUNLOCKCLSTATE();
4809 return (0);
4810 }
4811 if (islept)
4812 break;
4813 }
4814 if (islept)
4815 continue;
4816 NFSUNLOCKCLSTATE();
4817 cred = newnfs_getcred();
4818 newnfs_copycred(&dp->nfsdl_cred, cred);
4819 nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0, NULL);
4820 NFSFREECRED(cred);
4821 triedrecall = 1;
4822 NFSLOCKCLSTATE();
4823 nfsv4_unlock(&clp->nfsc_lock, 0);
4824 igotlock = 0;
4825 continue;
4826 }
4827 *stp = dp->nfsdl_stateid;
4828 retcnt = 1;
4829 nfscl_cleandeleg(dp);
4830 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4831 }
4832 if (igotlock)
4833 nfsv4_unlock(&clp->nfsc_lock, 0);
4834 NFSUNLOCKCLSTATE();
4835 return (retcnt);
4836 }
4837 }
4838
4839 /*
4840 * Look for associated delegation(s) that should be DelegReturned.
4841 */
4842 int
nfscl_renamedeleg(vnode_t fvp,nfsv4stateid_t * fstp,int * gotfdp,vnode_t tvp,nfsv4stateid_t * tstp,int * gottdp,NFSPROC_T * p)4843 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
4844 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
4845 {
4846 struct nfsclclient *clp;
4847 struct nfscldeleg *dp;
4848 struct nfsclowner *owp;
4849 struct nfscllockowner *lp;
4850 struct nfsmount *nmp;
4851 struct mount *mp;
4852 struct ucred *cred;
4853 struct nfsnode *np;
4854 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4855
4856 nmp = VFSTONFS(fvp->v_mount);
4857 *gotfdp = 0;
4858 *gottdp = 0;
4859 if (NFSHASPNFS(nmp))
4860 return (retcnt);
4861 NFSLOCKMNT(nmp);
4862 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
4863 NFSUNLOCKMNT(nmp);
4864 return (retcnt);
4865 }
4866 NFSUNLOCKMNT(nmp);
4867 mp = nmp->nm_mountp;
4868 NFSLOCKCLSTATE();
4869 /*
4870 * Loop around waiting for:
4871 * - outstanding I/O operations on delegations to complete
4872 * - for a delegation on fvp that has state, lock the client and
4873 * do a recall
4874 * - return delegation(s) with no state.
4875 */
4876 while (1) {
4877 clp = nfscl_findcl(nmp);
4878 if (clp == NULL) {
4879 NFSUNLOCKCLSTATE();
4880 return (retcnt);
4881 }
4882 np = VTONFS(fvp);
4883 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4884 np->n_fhp->nfh_len);
4885 if (dp != NULL && *gotfdp == 0) {
4886 /*
4887 * Wait for outstanding I/O ops to be done.
4888 */
4889 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4890 if (igotlock) {
4891 nfsv4_unlock(&clp->nfsc_lock, 0);
4892 igotlock = 0;
4893 }
4894 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4895 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4896 "nfscld", hz);
4897 if (NFSCL_FORCEDISM(mp)) {
4898 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4899 NFSUNLOCKCLSTATE();
4900 *gotfdp = 0;
4901 *gottdp = 0;
4902 return (0);
4903 }
4904 continue;
4905 }
4906 needsrecall = 0;
4907 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4908 if (!LIST_EMPTY(&owp->nfsow_open)) {
4909 needsrecall = 1;
4910 break;
4911 }
4912 }
4913 if (!needsrecall) {
4914 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4915 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4916 needsrecall = 1;
4917 break;
4918 }
4919 }
4920 }
4921 if (needsrecall && !triedrecall) {
4922 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4923 islept = 0;
4924 while (!igotlock) {
4925 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4926 &islept, NFSCLSTATEMUTEXPTR, mp);
4927 if (NFSCL_FORCEDISM(mp)) {
4928 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET;
4929 if (igotlock)
4930 nfsv4_unlock(&clp->nfsc_lock, 0);
4931 NFSUNLOCKCLSTATE();
4932 *gotfdp = 0;
4933 *gottdp = 0;
4934 return (0);
4935 }
4936 if (islept)
4937 break;
4938 }
4939 if (islept)
4940 continue;
4941 NFSUNLOCKCLSTATE();
4942 cred = newnfs_getcred();
4943 newnfs_copycred(&dp->nfsdl_cred, cred);
4944 nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0, NULL);
4945 NFSFREECRED(cred);
4946 triedrecall = 1;
4947 NFSLOCKCLSTATE();
4948 nfsv4_unlock(&clp->nfsc_lock, 0);
4949 igotlock = 0;
4950 continue;
4951 }
4952 *fstp = dp->nfsdl_stateid;
4953 retcnt++;
4954 *gotfdp = 1;
4955 nfscl_cleandeleg(dp);
4956 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4957 }
4958 if (igotlock) {
4959 nfsv4_unlock(&clp->nfsc_lock, 0);
4960 igotlock = 0;
4961 }
4962 if (tvp != NULL) {
4963 np = VTONFS(tvp);
4964 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4965 np->n_fhp->nfh_len);
4966 if (dp != NULL && *gottdp == 0) {
4967 /*
4968 * Wait for outstanding I/O ops to be done.
4969 */
4970 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4971 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4972 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO,
4973 "nfscld", hz);
4974 if (NFSCL_FORCEDISM(mp)) {
4975 NFSUNLOCKCLSTATE();
4976 *gotfdp = 0;
4977 *gottdp = 0;
4978 return (0);
4979 }
4980 continue;
4981 }
4982 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4983 if (!LIST_EMPTY(&owp->nfsow_open)) {
4984 NFSUNLOCKCLSTATE();
4985 return (retcnt);
4986 }
4987 }
4988 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4989 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4990 NFSUNLOCKCLSTATE();
4991 return (retcnt);
4992 }
4993 }
4994 *tstp = dp->nfsdl_stateid;
4995 retcnt++;
4996 *gottdp = 1;
4997 nfscl_cleandeleg(dp);
4998 nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
4999 }
5000 }
5001 NFSUNLOCKCLSTATE();
5002 return (retcnt);
5003 }
5004 }
5005
5006 /*
5007 * Get a reference on the clientid associated with the mount point.
5008 * Return 1 if success, 0 otherwise.
5009 */
5010 int
nfscl_getref(struct nfsmount * nmp)5011 nfscl_getref(struct nfsmount *nmp)
5012 {
5013 struct nfsclclient *clp;
5014 int ret;
5015
5016 NFSLOCKCLSTATE();
5017 clp = nfscl_findcl(nmp);
5018 if (clp == NULL) {
5019 NFSUNLOCKCLSTATE();
5020 return (0);
5021 }
5022 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, nmp->nm_mountp);
5023 ret = 1;
5024 if (NFSCL_FORCEDISM(nmp->nm_mountp))
5025 ret = 0;
5026 NFSUNLOCKCLSTATE();
5027 return (ret);
5028 }
5029
5030 /*
5031 * Release a reference on a clientid acquired with the above call.
5032 */
5033 void
nfscl_relref(struct nfsmount * nmp)5034 nfscl_relref(struct nfsmount *nmp)
5035 {
5036 struct nfsclclient *clp;
5037
5038 NFSLOCKCLSTATE();
5039 clp = nfscl_findcl(nmp);
5040 if (clp == NULL) {
5041 NFSUNLOCKCLSTATE();
5042 return;
5043 }
5044 nfsv4_relref(&clp->nfsc_lock);
5045 NFSUNLOCKCLSTATE();
5046 }
5047
5048 /*
5049 * Save the size attribute in the delegation, since the nfsnode
5050 * is going away.
5051 */
5052 void
nfscl_reclaimnode(vnode_t vp)5053 nfscl_reclaimnode(vnode_t vp)
5054 {
5055 struct nfsclclient *clp;
5056 struct nfscldeleg *dp;
5057 struct nfsnode *np = VTONFS(vp);
5058 struct nfsmount *nmp;
5059
5060 nmp = VFSTONFS(vp->v_mount);
5061 if (!NFSHASNFSV4(nmp))
5062 return;
5063 NFSLOCKCLSTATE();
5064 clp = nfscl_findcl(nmp);
5065 if (clp == NULL) {
5066 NFSUNLOCKCLSTATE();
5067 return;
5068 }
5069 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5070 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
5071 dp->nfsdl_size = np->n_size;
5072 NFSUNLOCKCLSTATE();
5073 }
5074
5075 /*
5076 * Get the saved size attribute in the delegation, since it is a
5077 * newly allocated nfsnode.
5078 */
5079 void
nfscl_newnode(vnode_t vp)5080 nfscl_newnode(vnode_t vp)
5081 {
5082 struct nfsclclient *clp;
5083 struct nfscldeleg *dp;
5084 struct nfsnode *np = VTONFS(vp);
5085 struct nfsmount *nmp;
5086
5087 nmp = VFSTONFS(vp->v_mount);
5088 if (!NFSHASNFSV4(nmp))
5089 return;
5090 NFSLOCKCLSTATE();
5091 clp = nfscl_findcl(nmp);
5092 if (clp == NULL) {
5093 NFSUNLOCKCLSTATE();
5094 return;
5095 }
5096 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5097 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
5098 np->n_size = dp->nfsdl_size;
5099 NFSUNLOCKCLSTATE();
5100 }
5101
5102 /*
5103 * If there is a valid write delegation for this file, set the modtime
5104 * to the local clock time.
5105 */
5106 void
nfscl_delegmodtime(vnode_t vp)5107 nfscl_delegmodtime(vnode_t vp)
5108 {
5109 struct nfsclclient *clp;
5110 struct nfscldeleg *dp;
5111 struct nfsnode *np = VTONFS(vp);
5112 struct nfsmount *nmp;
5113
5114 nmp = VFSTONFS(vp->v_mount);
5115 if (!NFSHASNFSV4(nmp))
5116 return;
5117 NFSLOCKMNT(nmp);
5118 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
5119 NFSUNLOCKMNT(nmp);
5120 return;
5121 }
5122 NFSUNLOCKMNT(nmp);
5123 NFSLOCKCLSTATE();
5124 clp = nfscl_findcl(nmp);
5125 if (clp == NULL) {
5126 NFSUNLOCKCLSTATE();
5127 return;
5128 }
5129 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5130 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
5131 nanotime(&dp->nfsdl_modtime);
5132 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
5133 }
5134 NFSUNLOCKCLSTATE();
5135 }
5136
5137 /*
5138 * If there is a valid write delegation for this file with a modtime set,
5139 * put that modtime in mtime.
5140 */
5141 void
nfscl_deleggetmodtime(vnode_t vp,struct timespec * mtime)5142 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
5143 {
5144 struct nfsclclient *clp;
5145 struct nfscldeleg *dp;
5146 struct nfsnode *np = VTONFS(vp);
5147 struct nfsmount *nmp;
5148
5149 nmp = VFSTONFS(vp->v_mount);
5150 if (!NFSHASNFSV4(nmp))
5151 return;
5152 NFSLOCKMNT(nmp);
5153 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
5154 NFSUNLOCKMNT(nmp);
5155 return;
5156 }
5157 NFSUNLOCKMNT(nmp);
5158 NFSLOCKCLSTATE();
5159 clp = nfscl_findcl(nmp);
5160 if (clp == NULL) {
5161 NFSUNLOCKCLSTATE();
5162 return;
5163 }
5164 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5165 if (dp != NULL &&
5166 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
5167 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
5168 *mtime = dp->nfsdl_modtime;
5169 NFSUNLOCKCLSTATE();
5170 }
5171
5172 static int
nfscl_errmap(struct nfsrv_descript * nd,u_int32_t minorvers)5173 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
5174 {
5175 short *defaulterrp, *errp;
5176
5177 if (!nd->nd_repstat)
5178 return (0);
5179 if (nd->nd_procnum == NFSPROC_NOOP)
5180 return (txdr_unsigned(nd->nd_repstat & 0xffff));
5181 if (nd->nd_repstat == EBADRPC)
5182 return (txdr_unsigned(NFSERR_BADXDR));
5183 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
5184 nd->nd_repstat == NFSERR_OPILLEGAL)
5185 return (txdr_unsigned(nd->nd_repstat));
5186 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
5187 minorvers > NFSV4_MINORVERSION) {
5188 /* NFSv4.n error. */
5189 return (txdr_unsigned(nd->nd_repstat));
5190 }
5191 if (nd->nd_procnum < NFSV4OP_CBNOPS)
5192 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
5193 else
5194 return (txdr_unsigned(nd->nd_repstat));
5195 while (*++errp)
5196 if (*errp == (short)nd->nd_repstat)
5197 return (txdr_unsigned(nd->nd_repstat));
5198 return (txdr_unsigned(*defaulterrp));
5199 }
5200
5201 /*
5202 * Called to find/add a layout to a client.
5203 * This function returns the layout with a refcnt (shared lock) upon
5204 * success (returns 0) or with no lock/refcnt on the layout when an
5205 * error is returned.
5206 * If a layout is passed in via lypp, it is locked (exclusively locked).
5207 */
5208 int
nfscl_layout(struct nfsmount * nmp,vnode_t vp,u_int8_t * fhp,int fhlen,nfsv4stateid_t * stateidp,int layouttype,int retonclose,struct nfsclflayouthead * fhlp,struct nfscllayout ** lypp,struct ucred * cred,NFSPROC_T * p)5209 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
5210 nfsv4stateid_t *stateidp, int layouttype, int retonclose,
5211 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
5212 struct ucred *cred, NFSPROC_T *p)
5213 {
5214 struct nfsclclient *clp;
5215 struct nfscllayout *lyp, *tlyp;
5216 struct nfsclflayout *flp;
5217 struct nfsnode *np = VTONFS(vp);
5218 mount_t mp;
5219 int layout_passed_in;
5220
5221 mp = nmp->nm_mountp;
5222 layout_passed_in = 1;
5223 tlyp = NULL;
5224 lyp = *lypp;
5225 if (lyp == NULL) {
5226 layout_passed_in = 0;
5227 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
5228 M_WAITOK | M_ZERO);
5229 }
5230
5231 NFSLOCKCLSTATE();
5232 clp = nmp->nm_clp;
5233 if (clp == NULL) {
5234 if (layout_passed_in != 0)
5235 nfsv4_unlock(&lyp->nfsly_lock, 0);
5236 NFSUNLOCKCLSTATE();
5237 if (tlyp != NULL)
5238 free(tlyp, M_NFSLAYOUT);
5239 return (EPERM);
5240 }
5241 if (lyp == NULL) {
5242 /*
5243 * Although no lyp was passed in, another thread might have
5244 * allocated one. If one is found, just increment it's ref
5245 * count and return it.
5246 */
5247 lyp = nfscl_findlayout(clp, fhp, fhlen);
5248 if (lyp == NULL) {
5249 lyp = tlyp;
5250 tlyp = NULL;
5251 lyp->nfsly_stateid.seqid = stateidp->seqid;
5252 lyp->nfsly_stateid.other[0] = stateidp->other[0];
5253 lyp->nfsly_stateid.other[1] = stateidp->other[1];
5254 lyp->nfsly_stateid.other[2] = stateidp->other[2];
5255 lyp->nfsly_lastbyte = 0;
5256 LIST_INIT(&lyp->nfsly_flayread);
5257 LIST_INIT(&lyp->nfsly_flayrw);
5258 LIST_INIT(&lyp->nfsly_recall);
5259 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
5260 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
5261 lyp->nfsly_clp = clp;
5262 if (layouttype == NFSLAYOUT_FLEXFILE)
5263 lyp->nfsly_flags = NFSLY_FLEXFILE;
5264 else
5265 lyp->nfsly_flags = NFSLY_FILES;
5266 if (retonclose != 0)
5267 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
5268 lyp->nfsly_fhlen = fhlen;
5269 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
5270 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5271 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
5272 nfsly_hash);
5273 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5274 nfscl_layoutcnt++;
5275 nfsstatsv1.cllayouts++;
5276 } else {
5277 if (retonclose != 0)
5278 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
5279 if (stateidp->seqid > lyp->nfsly_stateid.seqid)
5280 lyp->nfsly_stateid.seqid = stateidp->seqid;
5281 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
5282 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5283 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5284 }
5285 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5286 if (NFSCL_FORCEDISM(mp)) {
5287 NFSUNLOCKCLSTATE();
5288 if (tlyp != NULL)
5289 free(tlyp, M_NFSLAYOUT);
5290 return (EPERM);
5291 }
5292 *lypp = lyp;
5293 } else if (stateidp->seqid > lyp->nfsly_stateid.seqid)
5294 lyp->nfsly_stateid.seqid = stateidp->seqid;
5295
5296 /* Merge the new list of File Layouts into the list. */
5297 flp = LIST_FIRST(fhlp);
5298 if (flp != NULL) {
5299 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
5300 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
5301 else
5302 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
5303 }
5304 if (layout_passed_in != 0)
5305 nfsv4_unlock(&lyp->nfsly_lock, 1);
5306 NFSUNLOCKCLSTATE();
5307 if (tlyp != NULL)
5308 free(tlyp, M_NFSLAYOUT);
5309 return (0);
5310 }
5311
5312 /*
5313 * Search for a layout by MDS file handle.
5314 * If one is found, it is returned with a refcnt (shared lock) iff
5315 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
5316 * returned NULL.
5317 */
5318 struct nfscllayout *
nfscl_getlayout(struct nfsclclient * clp,uint8_t * fhp,int fhlen,uint64_t off,uint32_t rwaccess,struct nfsclflayout ** retflpp,int * recalledp)5319 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
5320 uint64_t off, uint32_t rwaccess, struct nfsclflayout **retflpp,
5321 int *recalledp)
5322 {
5323 struct nfscllayout *lyp;
5324 mount_t mp;
5325 int error, igotlock;
5326
5327 mp = clp->nfsc_nmp->nm_mountp;
5328 *recalledp = 0;
5329 *retflpp = NULL;
5330 NFSLOCKCLSTATE();
5331 lyp = nfscl_findlayout(clp, fhp, fhlen);
5332 if (lyp != NULL) {
5333 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5334 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
5335 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
5336 lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
5337 error = nfscl_findlayoutforio(lyp, off, rwaccess,
5338 retflpp);
5339 if (error == 0)
5340 nfsv4_getref(&lyp->nfsly_lock, NULL,
5341 NFSCLSTATEMUTEXPTR, mp);
5342 else {
5343 do {
5344 igotlock = nfsv4_lock(&lyp->nfsly_lock,
5345 1, NULL, NFSCLSTATEMUTEXPTR, mp);
5346 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
5347 *retflpp = NULL;
5348 }
5349 if (NFSCL_FORCEDISM(mp)) {
5350 lyp = NULL;
5351 *recalledp = 1;
5352 }
5353 } else {
5354 lyp = NULL;
5355 *recalledp = 1;
5356 }
5357 }
5358 NFSUNLOCKCLSTATE();
5359 return (lyp);
5360 }
5361
5362 /*
5363 * Search for a layout by MDS file handle. If one is found, mark in to be
5364 * recalled, if it already marked "return on close".
5365 */
5366 static void
nfscl_retoncloselayout(vnode_t vp,struct nfsclclient * clp,uint8_t * fhp,int fhlen,struct nfsclrecalllayout ** recallpp,struct nfscllayout ** lypp)5367 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
5368 int fhlen, struct nfsclrecalllayout **recallpp, struct nfscllayout **lypp)
5369 {
5370 struct nfscllayout *lyp;
5371 uint32_t iomode;
5372
5373 *lypp = NULL;
5374 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vp->v_mount)) ||
5375 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
5376 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
5377 return;
5378 lyp = nfscl_findlayout(clp, fhp, fhlen);
5379 if (lyp != NULL && (lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) {
5380 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5381 iomode = 0;
5382 if (!LIST_EMPTY(&lyp->nfsly_flayread))
5383 iomode |= NFSLAYOUTIOMODE_READ;
5384 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
5385 iomode |= NFSLAYOUTIOMODE_RW;
5386 nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
5387 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL,
5388 *recallpp);
5389 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
5390 *recallpp = NULL;
5391 }
5392
5393 /* Now, wake up renew thread to do LayoutReturn. */
5394 wakeup(clp);
5395 *lypp = lyp;
5396 }
5397 }
5398
5399 /*
5400 * Mark the layout to be recalled and with an error.
5401 * Also, disable the dsp from further use.
5402 */
5403 void
nfscl_dserr(uint32_t op,uint32_t stat,struct nfscldevinfo * dp,struct nfscllayout * lyp,struct nfsclds * dsp)5404 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp,
5405 struct nfscllayout *lyp, struct nfsclds *dsp)
5406 {
5407 struct nfsclrecalllayout *recallp;
5408 uint32_t iomode;
5409
5410 printf("DS being disabled, error=%d\n", stat);
5411 /* Set up the return of the layout. */
5412 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
5413 iomode = 0;
5414 NFSLOCKCLSTATE();
5415 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
5416 if (!LIST_EMPTY(&lyp->nfsly_flayread))
5417 iomode |= NFSLAYOUTIOMODE_READ;
5418 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
5419 iomode |= NFSLAYOUTIOMODE_RW;
5420 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
5421 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op,
5422 dp->nfsdi_deviceid, recallp);
5423 NFSUNLOCKCLSTATE();
5424 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode);
5425 } else {
5426 NFSUNLOCKCLSTATE();
5427 free(recallp, M_NFSLAYRECALL);
5428 }
5429
5430 /* And shut the TCP connection down. */
5431 nfscl_cancelreqs(dsp);
5432 }
5433
5434 /*
5435 * Cancel all RPCs for this "dsp" by closing the connection.
5436 * Also, mark the session as defunct.
5437 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and
5438 * cannot be shut down.
5439 */
5440 void
nfscl_cancelreqs(struct nfsclds * dsp)5441 nfscl_cancelreqs(struct nfsclds *dsp)
5442 {
5443 struct __rpc_client *cl;
5444 static int non_event;
5445
5446 NFSLOCKDS(dsp);
5447 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 &&
5448 dsp->nfsclds_sockp != NULL &&
5449 dsp->nfsclds_sockp->nr_client != NULL) {
5450 dsp->nfsclds_flags |= NFSCLDS_CLOSED;
5451 cl = dsp->nfsclds_sockp->nr_client;
5452 dsp->nfsclds_sess.nfsess_defunct = 1;
5453 NFSUNLOCKDS(dsp);
5454 CLNT_CLOSE(cl);
5455 /*
5456 * This 1sec sleep is done to reduce the number of reconnect
5457 * attempts made on the DS while it has failed.
5458 */
5459 tsleep(&non_event, PVFS, "ndscls", hz);
5460 return;
5461 }
5462 NFSUNLOCKDS(dsp);
5463 }
5464
5465 /*
5466 * Dereference a layout.
5467 */
5468 void
nfscl_rellayout(struct nfscllayout * lyp,int exclocked)5469 nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
5470 {
5471
5472 NFSLOCKCLSTATE();
5473 if (exclocked != 0)
5474 nfsv4_unlock(&lyp->nfsly_lock, 0);
5475 else
5476 nfsv4_relref(&lyp->nfsly_lock);
5477 NFSUNLOCKCLSTATE();
5478 }
5479
5480 /*
5481 * Search for a devinfo by deviceid. If one is found, return it after
5482 * acquiring a reference count on it.
5483 */
5484 struct nfscldevinfo *
nfscl_getdevinfo(struct nfsclclient * clp,uint8_t * deviceid,struct nfscldevinfo * dip)5485 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
5486 struct nfscldevinfo *dip)
5487 {
5488
5489 NFSLOCKCLSTATE();
5490 if (dip == NULL)
5491 dip = nfscl_finddevinfo(clp, deviceid);
5492 if (dip != NULL)
5493 dip->nfsdi_refcnt++;
5494 NFSUNLOCKCLSTATE();
5495 return (dip);
5496 }
5497
5498 /*
5499 * Dereference a devinfo structure.
5500 */
5501 static void
nfscl_reldevinfo_locked(struct nfscldevinfo * dip)5502 nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
5503 {
5504
5505 dip->nfsdi_refcnt--;
5506 if (dip->nfsdi_refcnt == 0)
5507 wakeup(&dip->nfsdi_refcnt);
5508 }
5509
5510 /*
5511 * Dereference a devinfo structure.
5512 */
5513 void
nfscl_reldevinfo(struct nfscldevinfo * dip)5514 nfscl_reldevinfo(struct nfscldevinfo *dip)
5515 {
5516
5517 NFSLOCKCLSTATE();
5518 nfscl_reldevinfo_locked(dip);
5519 NFSUNLOCKCLSTATE();
5520 }
5521
5522 /*
5523 * Find a layout for this file handle. Return NULL upon failure.
5524 */
5525 static struct nfscllayout *
nfscl_findlayout(struct nfsclclient * clp,u_int8_t * fhp,int fhlen)5526 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
5527 {
5528 struct nfscllayout *lyp;
5529
5530 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
5531 if (lyp->nfsly_fhlen == fhlen &&
5532 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
5533 break;
5534 return (lyp);
5535 }
5536
5537 /*
5538 * Find a devinfo for this deviceid. Return NULL upon failure.
5539 */
5540 static struct nfscldevinfo *
nfscl_finddevinfo(struct nfsclclient * clp,uint8_t * deviceid)5541 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
5542 {
5543 struct nfscldevinfo *dip;
5544
5545 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
5546 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
5547 == 0)
5548 break;
5549 return (dip);
5550 }
5551
5552 /*
5553 * Merge the new file layout list into the main one, maintaining it in
5554 * increasing offset order.
5555 */
5556 static void
nfscl_mergeflayouts(struct nfsclflayouthead * fhlp,struct nfsclflayouthead * newfhlp)5557 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
5558 struct nfsclflayouthead *newfhlp)
5559 {
5560 struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
5561
5562 flp = LIST_FIRST(fhlp);
5563 prevflp = NULL;
5564 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
5565 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
5566 prevflp = flp;
5567 flp = LIST_NEXT(flp, nfsfl_list);
5568 }
5569 if (prevflp == NULL)
5570 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
5571 else
5572 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
5573 prevflp = nflp;
5574 }
5575 }
5576
5577 /*
5578 * Add this nfscldevinfo to the client, if it doesn't already exist.
5579 * This function consumes the structure pointed at by dip, if not NULL.
5580 */
5581 int
nfscl_adddevinfo(struct nfsmount * nmp,struct nfscldevinfo * dip,int ind,struct nfsclflayout * flp)5582 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind,
5583 struct nfsclflayout *flp)
5584 {
5585 struct nfsclclient *clp;
5586 struct nfscldevinfo *tdip;
5587 uint8_t *dev;
5588
5589 NFSLOCKCLSTATE();
5590 clp = nmp->nm_clp;
5591 if (clp == NULL) {
5592 NFSUNLOCKCLSTATE();
5593 if (dip != NULL)
5594 free(dip, M_NFSDEVINFO);
5595 return (ENODEV);
5596 }
5597 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5598 dev = flp->nfsfl_dev;
5599 else
5600 dev = flp->nfsfl_ffm[ind].dev;
5601 tdip = nfscl_finddevinfo(clp, dev);
5602 if (tdip != NULL) {
5603 tdip->nfsdi_layoutrefs++;
5604 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5605 flp->nfsfl_devp = tdip;
5606 else
5607 flp->nfsfl_ffm[ind].devp = tdip;
5608 nfscl_reldevinfo_locked(tdip);
5609 NFSUNLOCKCLSTATE();
5610 if (dip != NULL)
5611 free(dip, M_NFSDEVINFO);
5612 return (0);
5613 }
5614 if (dip != NULL) {
5615 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
5616 dip->nfsdi_layoutrefs = 1;
5617 if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5618 flp->nfsfl_devp = dip;
5619 else
5620 flp->nfsfl_ffm[ind].devp = dip;
5621 }
5622 NFSUNLOCKCLSTATE();
5623 if (dip == NULL)
5624 return (ENODEV);
5625 return (0);
5626 }
5627
5628 /*
5629 * Free up a layout structure and associated file layout structure(s).
5630 */
5631 void
nfscl_freelayout(struct nfscllayout * layp)5632 nfscl_freelayout(struct nfscllayout *layp)
5633 {
5634 struct nfsclflayout *flp, *nflp;
5635 struct nfsclrecalllayout *rp, *nrp;
5636
5637 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
5638 LIST_REMOVE(flp, nfsfl_list);
5639 nfscl_freeflayout(flp);
5640 }
5641 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
5642 LIST_REMOVE(flp, nfsfl_list);
5643 nfscl_freeflayout(flp);
5644 }
5645 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
5646 LIST_REMOVE(rp, nfsrecly_list);
5647 free(rp, M_NFSLAYRECALL);
5648 }
5649 nfscl_layoutcnt--;
5650 nfsstatsv1.cllayouts--;
5651 free(layp, M_NFSLAYOUT);
5652 }
5653
5654 /*
5655 * Free up a file layout structure.
5656 */
5657 void
nfscl_freeflayout(struct nfsclflayout * flp)5658 nfscl_freeflayout(struct nfsclflayout *flp)
5659 {
5660 int i, j;
5661
5662 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) {
5663 for (i = 0; i < flp->nfsfl_fhcnt; i++)
5664 free(flp->nfsfl_fh[i], M_NFSFH);
5665 if (flp->nfsfl_devp != NULL)
5666 flp->nfsfl_devp->nfsdi_layoutrefs--;
5667 }
5668 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0)
5669 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) {
5670 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++)
5671 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH);
5672 if (flp->nfsfl_ffm[i].devp != NULL)
5673 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--;
5674 }
5675 free(flp, M_NFSFLAYOUT);
5676 }
5677
5678 /*
5679 * Free up a file layout devinfo structure.
5680 */
5681 void
nfscl_freedevinfo(struct nfscldevinfo * dip)5682 nfscl_freedevinfo(struct nfscldevinfo *dip)
5683 {
5684
5685 free(dip, M_NFSDEVINFO);
5686 }
5687
5688 /*
5689 * Mark any layouts that match as recalled.
5690 */
5691 static int
nfscl_layoutrecall(int recalltype,struct nfscllayout * lyp,uint32_t iomode,uint64_t off,uint64_t len,uint32_t stateseqid,uint32_t stat,uint32_t op,char * devid,struct nfsclrecalllayout * recallp)5692 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
5693 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op,
5694 char *devid, struct nfsclrecalllayout *recallp)
5695 {
5696 struct nfsclrecalllayout *rp, *orp;
5697
5698 recallp->nfsrecly_recalltype = recalltype;
5699 recallp->nfsrecly_iomode = iomode;
5700 recallp->nfsrecly_stateseqid = stateseqid;
5701 recallp->nfsrecly_off = off;
5702 recallp->nfsrecly_len = len;
5703 recallp->nfsrecly_stat = stat;
5704 recallp->nfsrecly_op = op;
5705 if (devid != NULL)
5706 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID);
5707 /*
5708 * Order the list as file returns first, followed by fsid and any
5709 * returns, both in increasing stateseqid order.
5710 * Note that the seqids wrap around, so 1 is after 0xffffffff.
5711 * (I'm not sure this is correct because I find RFC5661 confusing
5712 * on this, but hopefully it will work ok.)
5713 */
5714 orp = NULL;
5715 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5716 orp = rp;
5717 if ((recalltype == NFSLAYOUTRETURN_FILE &&
5718 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
5719 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
5720 (recalltype != NFSLAYOUTRETURN_FILE &&
5721 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
5722 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
5723 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
5724 break;
5725 }
5726
5727 /*
5728 * Put any error return on all the file returns that will
5729 * preceed this one.
5730 */
5731 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE &&
5732 stat != 0 && rp->nfsrecly_stat == 0) {
5733 rp->nfsrecly_stat = stat;
5734 rp->nfsrecly_op = op;
5735 if (devid != NULL)
5736 NFSBCOPY(devid, rp->nfsrecly_devid,
5737 NFSX_V4DEVICEID);
5738 }
5739 }
5740 if (rp == NULL) {
5741 if (orp == NULL)
5742 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
5743 nfsrecly_list);
5744 else
5745 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
5746 }
5747 lyp->nfsly_flags |= NFSLY_RECALL;
5748 wakeup(lyp->nfsly_clp);
5749 return (0);
5750 }
5751
5752 /*
5753 * Compare the two seqids for ordering. The trick is that the seqids can
5754 * wrap around from 0xffffffff->0, so check for the cases where one
5755 * has wrapped around.
5756 * Return 1 if seqid1 comes before seqid2, 0 otherwise.
5757 */
5758 static int
nfscl_seq(uint32_t seqid1,uint32_t seqid2)5759 nfscl_seq(uint32_t seqid1, uint32_t seqid2)
5760 {
5761
5762 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
5763 /* seqid2 has wrapped around. */
5764 return (0);
5765 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
5766 /* seqid1 has wrapped around. */
5767 return (1);
5768 if (seqid1 <= seqid2)
5769 return (1);
5770 return (0);
5771 }
5772
5773 /*
5774 * Do a layout return for each of the recalls.
5775 */
5776 static void
nfscl_layoutreturn(struct nfsmount * nmp,struct nfscllayout * lyp,struct ucred * cred,NFSPROC_T * p)5777 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
5778 struct ucred *cred, NFSPROC_T *p)
5779 {
5780 struct nfsclrecalllayout *rp;
5781 nfsv4stateid_t stateid;
5782 int layouttype;
5783
5784 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
5785 stateid.seqid = lyp->nfsly_stateid.seqid;
5786 if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5787 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5788 else
5789 layouttype = NFSLAYOUT_FLEXFILE;
5790 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5791 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
5792 lyp->nfsly_fhlen, 0, layouttype,
5793 rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
5794 rp->nfsrecly_off, rp->nfsrecly_len,
5795 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op,
5796 rp->nfsrecly_devid);
5797 }
5798 }
5799
5800 /*
5801 * Do the layout commit for a file layout.
5802 */
5803 static void
nfscl_dolayoutcommit(struct nfsmount * nmp,struct nfscllayout * lyp,struct ucred * cred,NFSPROC_T * p)5804 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
5805 struct ucred *cred, NFSPROC_T *p)
5806 {
5807 struct nfsclflayout *flp;
5808 uint64_t len;
5809 int error, layouttype;
5810
5811 if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5812 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5813 else
5814 layouttype = NFSLAYOUT_FLEXFILE;
5815 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
5816 if (layouttype == NFSLAYOUT_FLEXFILE &&
5817 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) {
5818 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n");
5819 /* If not supported, don't bother doing it. */
5820 NFSLOCKMNT(nmp);
5821 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5822 NFSUNLOCKMNT(nmp);
5823 break;
5824 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
5825 len = flp->nfsfl_end - flp->nfsfl_off;
5826 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
5827 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
5828 lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
5829 layouttype, cred, p);
5830 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
5831 if (error == NFSERR_NOTSUPP) {
5832 /* If not supported, don't bother doing it. */
5833 NFSLOCKMNT(nmp);
5834 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5835 NFSUNLOCKMNT(nmp);
5836 break;
5837 }
5838 }
5839 }
5840 }
5841
5842 /*
5843 * Commit all layouts for a file (vnode).
5844 */
5845 int
nfscl_layoutcommit(vnode_t vp,NFSPROC_T * p)5846 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
5847 {
5848 struct nfsclclient *clp;
5849 struct nfscllayout *lyp;
5850 struct nfsnode *np = VTONFS(vp);
5851 mount_t mp;
5852 struct nfsmount *nmp;
5853
5854 mp = vp->v_mount;
5855 nmp = VFSTONFS(mp);
5856 if (NFSHASNOLAYOUTCOMMIT(nmp))
5857 return (0);
5858 NFSLOCKCLSTATE();
5859 clp = nmp->nm_clp;
5860 if (clp == NULL) {
5861 NFSUNLOCKCLSTATE();
5862 return (EPERM);
5863 }
5864 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5865 if (lyp == NULL) {
5866 NFSUNLOCKCLSTATE();
5867 return (EPERM);
5868 }
5869 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5870 if (NFSCL_FORCEDISM(mp)) {
5871 NFSUNLOCKCLSTATE();
5872 return (EPERM);
5873 }
5874 tryagain:
5875 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
5876 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
5877 NFSUNLOCKCLSTATE();
5878 NFSCL_DEBUG(4, "do layoutcommit2\n");
5879 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
5880 NFSLOCKCLSTATE();
5881 goto tryagain;
5882 }
5883 nfsv4_relref(&lyp->nfsly_lock);
5884 NFSUNLOCKCLSTATE();
5885 return (0);
5886 }
5887