2 * Copyright (c) 2009 Rick Macklem, University of Guelph
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include <fs/nfs/nfsport.h>
34 struct nfsrv_stablefirst nfsrv_stablefirst;
35 int nfsrv_issuedelegs = 0;
36 int nfsrv_dolocallocks = 0;
37 struct nfsv4lock nfsv4rootfs_lock;
39 extern int newnfs_numnfsd;
40 extern struct nfsstatsv1 nfsstatsv1;
41 extern int nfsrv_lease;
42 extern struct timeval nfsboottime;
43 extern u_int32_t newnfs_true, newnfs_false;
47 SYSCTL_DECL(_vfs_nfsd);
48 int nfsrv_statehashsize = NFSSTATEHASHSIZE;
49 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN,
50 &nfsrv_statehashsize, 0,
51 "Size of state hash table set via loader.conf");
53 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE;
54 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN,
55 &nfsrv_clienthashsize, 0,
56 "Size of client hash table set via loader.conf");
58 int nfsrv_lockhashsize = NFSLOCKHASHSIZE;
59 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN,
60 &nfsrv_lockhashsize, 0,
61 "Size of file handle hash table set via loader.conf");
63 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE;
64 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN,
65 &nfsrv_sessionhashsize, 0,
66 "Size of session hash table set via loader.conf");
68 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT;
69 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN,
70 &nfsrv_v4statelimit, 0,
71 "High water limit for NFSv4 opens+locks+delegations");
73 static int nfsrv_writedelegifpos = 0;
74 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW,
75 &nfsrv_writedelegifpos, 0,
76 "Issue a write delegation for read opens if possible");
78 static int nfsrv_allowreadforwriteopen = 1;
79 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW,
80 &nfsrv_allowreadforwriteopen, 0,
81 "Allow Reads to be done with Write Access StateIDs");
84 * Hash lists for nfs V4.
86 struct nfsclienthashhead *nfsclienthash;
87 struct nfslockhashhead *nfslockhash;
88 struct nfssessionhash *nfssessionhash;
89 #endif /* !APPLEKEXT */
91 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0;
92 static time_t nfsrvboottime;
93 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0;
94 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER;
95 static int nfsrv_nogsscallback = 0;
98 static void nfsrv_dumpaclient(struct nfsclient *clp,
99 struct nfsd_dumpclients *dumpp);
100 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep,
102 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep,
104 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
106 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp,
107 int cansleep, NFSPROC_T *p);
108 static void nfsrv_freenfslock(struct nfslock *lop);
109 static void nfsrv_freenfslockfile(struct nfslockfile *lfp);
110 static void nfsrv_freedeleg(struct nfsstate *);
111 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp,
112 u_int32_t flags, struct nfsstate **stpp);
113 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
114 struct nfsstate **stpp);
115 static int nfsrv_getlockfh(vnode_t vp, u_short flags,
116 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p);
117 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
118 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit);
119 static void nfsrv_insertlock(struct nfslock *new_lop,
120 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp);
121 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
122 struct nfslock **other_lopp, struct nfslockfile *lfp);
123 static int nfsrv_getipnumber(u_char *cp);
124 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
125 nfsv4stateid_t *stateidp, int specialid);
126 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
128 static int nfsrv_docallback(struct nfsclient *clp, int procnum,
129 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp,
130 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p);
131 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
132 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp);
133 static u_int32_t nfsrv_nextclientindex(void);
134 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp);
135 static void nfsrv_markstable(struct nfsclient *clp);
136 static int nfsrv_checkstable(struct nfsclient *clp);
137 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct
138 vnode *vp, NFSPROC_T *p);
139 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp,
140 NFSPROC_T *p, vnode_t vp);
141 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
142 struct nfsclient *clp, int *haslockp, NFSPROC_T *p);
143 static int nfsrv_notsamecredname(struct nfsrv_descript *nd,
144 struct nfsclient *clp);
145 static time_t nfsrv_leaseexpiry(void);
146 static void nfsrv_delaydelegtimeout(struct nfsstate *stp);
147 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
148 struct nfsstate *stp, struct nfsrvcache *op);
149 static int nfsrv_nootherstate(struct nfsstate *stp);
150 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
151 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p);
152 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp,
153 uint64_t init_first, uint64_t init_end, NFSPROC_T *p);
154 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags,
155 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp,
157 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp,
159 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags,
160 uint64_t first, uint64_t end);
161 static void nfsrv_locklf(struct nfslockfile *lfp);
162 static void nfsrv_unlocklf(struct nfslockfile *lfp);
163 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid);
164 static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid);
165 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
166 int dont_replycache, struct nfsdsession **sepp);
167 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp);
170 * Scan the client list for a match and either return the current one,
171 * create a new entry or return an error.
172 * If returning a non-error, the clp structure must either be linked into
173 * the client list or free'd.
176 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp,
177 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p)
179 struct nfsclient *clp = NULL, *new_clp = *new_clpp;
181 struct nfsstate *stp, *tstp;
182 struct sockaddr_in *sad, *rad;
183 int zapit = 0, gotit, hasstate = 0, igotlock;
184 static u_int64_t confirm_index = 0;
187 * Check for state resource limit exceeded.
189 if (nfsrv_openpluslock > nfsrv_v4statelimit) {
190 error = NFSERR_RESOURCE;
194 if (nfsrv_issuedelegs == 0 ||
195 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0))
197 * Don't do callbacks when delegations are disabled or
198 * for AUTH_GSS unless enabled via nfsrv_nogsscallback.
199 * If establishing a callback connection is attempted
200 * when a firewall is blocking the callback path, the
201 * server may wait too long for the connect attempt to
202 * succeed during the Open. Some clients, such as Linux,
203 * may timeout and give up on the Open before the server
204 * replies. Also, since AUTH_GSS callbacks are not
205 * yet interoperability tested, they might cause the
206 * server to crap out, if they get past the Init call to
209 new_clp->lc_program = 0;
211 /* Lock out other nfsd threads */
212 NFSLOCKV4ROOTMUTEX();
213 nfsv4_relref(&nfsv4rootfs_lock);
215 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
216 NFSV4ROOTLOCKMUTEXPTR, NULL);
218 NFSUNLOCKV4ROOTMUTEX();
221 * Search for a match in the client list.
224 while (i < nfsrv_clienthashsize && !gotit) {
225 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
226 if (new_clp->lc_idlen == clp->lc_idlen &&
227 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) {
236 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) {
237 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) {
239 * For NFSv4.1, if confirmp->lval[1] is non-zero, the
240 * client is trying to update a confirmed clientid.
242 NFSLOCKV4ROOTMUTEX();
243 nfsv4_unlock(&nfsv4rootfs_lock, 1);
244 NFSUNLOCKV4ROOTMUTEX();
245 confirmp->lval[1] = 0;
246 error = NFSERR_NOENT;
250 * Get rid of the old one.
252 if (i != nfsrv_clienthashsize) {
253 LIST_REMOVE(clp, lc_hash);
254 nfsrv_cleanclient(clp, p);
255 nfsrv_freedeleglist(&clp->lc_deleg);
256 nfsrv_freedeleglist(&clp->lc_olddeleg);
260 * Add it after assigning a client id to it.
262 new_clp->lc_flags |= LCL_NEEDSCONFIRM;
263 if ((nd->nd_flag & ND_NFSV41) != 0)
264 new_clp->lc_confirm.lval[0] = confirmp->lval[0] =
267 confirmp->qval = new_clp->lc_confirm.qval =
269 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
270 (u_int32_t)nfsrvboottime;
271 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
272 nfsrv_nextclientindex();
273 new_clp->lc_stateindex = 0;
274 new_clp->lc_statemaxindex = 0;
275 new_clp->lc_cbref = 0;
276 new_clp->lc_expiry = nfsrv_leaseexpiry();
277 LIST_INIT(&new_clp->lc_open);
278 LIST_INIT(&new_clp->lc_deleg);
279 LIST_INIT(&new_clp->lc_olddeleg);
280 LIST_INIT(&new_clp->lc_session);
281 for (i = 0; i < nfsrv_statehashsize; i++)
282 LIST_INIT(&new_clp->lc_stateid[i]);
283 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
285 nfsstatsv1.srvclients++;
286 nfsrv_openpluslock++;
288 NFSLOCKV4ROOTMUTEX();
289 nfsv4_unlock(&nfsv4rootfs_lock, 1);
290 NFSUNLOCKV4ROOTMUTEX();
292 nfsrv_zapclient(clp, p);
298 * Now, handle the cases where the id is already issued.
300 if (nfsrv_notsamecredname(nd, clp)) {
302 * Check to see if there is expired state that should go away.
304 if (clp->lc_expiry < NFSD_MONOSEC &&
305 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) {
306 nfsrv_cleanclient(clp, p);
307 nfsrv_freedeleglist(&clp->lc_deleg);
311 * If there is outstanding state, then reply NFSERR_CLIDINUSE per
312 * RFC3530 Sec. 8.1.2 last para.
314 if (!LIST_EMPTY(&clp->lc_deleg)) {
316 } else if (LIST_EMPTY(&clp->lc_open)) {
320 /* Look for an Open on the OpenOwner */
321 LIST_FOREACH(stp, &clp->lc_open, ls_list) {
322 if (!LIST_EMPTY(&stp->ls_open)) {
330 * If the uid doesn't match, return NFSERR_CLIDINUSE after
331 * filling out the correct ipaddr and portnum.
333 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *);
334 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *);
335 sad->sin_addr.s_addr = rad->sin_addr.s_addr;
336 sad->sin_port = rad->sin_port;
337 NFSLOCKV4ROOTMUTEX();
338 nfsv4_unlock(&nfsv4rootfs_lock, 1);
339 NFSUNLOCKV4ROOTMUTEX();
340 error = NFSERR_CLIDINUSE;
345 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) {
347 * If the verifier has changed, the client has rebooted
348 * and a new client id is issued. The old state info
349 * can be thrown away once the SETCLIENTID_CONFIRM occurs.
351 LIST_REMOVE(clp, lc_hash);
352 new_clp->lc_flags |= LCL_NEEDSCONFIRM;
353 if ((nd->nd_flag & ND_NFSV41) != 0)
354 new_clp->lc_confirm.lval[0] = confirmp->lval[0] =
357 confirmp->qval = new_clp->lc_confirm.qval =
359 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
361 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
362 nfsrv_nextclientindex();
363 new_clp->lc_stateindex = 0;
364 new_clp->lc_statemaxindex = 0;
365 new_clp->lc_cbref = 0;
366 new_clp->lc_expiry = nfsrv_leaseexpiry();
369 * Save the state until confirmed.
371 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
372 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
373 tstp->ls_clp = new_clp;
374 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
375 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
376 tstp->ls_clp = new_clp;
377 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg,
379 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
380 tstp->ls_clp = new_clp;
381 for (i = 0; i < nfsrv_statehashsize; i++) {
382 LIST_NEWHEAD(&new_clp->lc_stateid[i],
383 &clp->lc_stateid[i], ls_hash);
384 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
385 tstp->ls_clp = new_clp;
387 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
389 nfsstatsv1.srvclients++;
390 nfsrv_openpluslock++;
392 NFSLOCKV4ROOTMUTEX();
393 nfsv4_unlock(&nfsv4rootfs_lock, 1);
394 NFSUNLOCKV4ROOTMUTEX();
397 * Must wait until any outstanding callback on the old clp
401 while (clp->lc_cbref) {
402 clp->lc_flags |= LCL_WAKEUPWANTED;
403 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
404 "nfsd clp", 10 * hz);
407 nfsrv_zapclient(clp, p);
412 /* For NFSv4.1, mark that we found a confirmed clientid. */
413 if ((nd->nd_flag & ND_NFSV41) != 0) {
414 clientidp->lval[0] = clp->lc_clientid.lval[0];
415 clientidp->lval[1] = clp->lc_clientid.lval[1];
416 confirmp->lval[0] = 0; /* Ignored by client */
417 confirmp->lval[1] = 1;
420 * id and verifier match, so update the net address info
421 * and get rid of any existing callback authentication
422 * handle, so a new one will be acquired.
424 LIST_REMOVE(clp, lc_hash);
425 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
426 new_clp->lc_expiry = nfsrv_leaseexpiry();
427 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index;
428 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
429 clp->lc_clientid.lval[0];
430 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
431 clp->lc_clientid.lval[1];
432 new_clp->lc_delegtime = clp->lc_delegtime;
433 new_clp->lc_stateindex = clp->lc_stateindex;
434 new_clp->lc_statemaxindex = clp->lc_statemaxindex;
435 new_clp->lc_cbref = 0;
436 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
437 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
438 tstp->ls_clp = new_clp;
439 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
440 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
441 tstp->ls_clp = new_clp;
442 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list);
443 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
444 tstp->ls_clp = new_clp;
445 for (i = 0; i < nfsrv_statehashsize; i++) {
446 LIST_NEWHEAD(&new_clp->lc_stateid[i],
447 &clp->lc_stateid[i], ls_hash);
448 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
449 tstp->ls_clp = new_clp;
451 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
453 nfsstatsv1.srvclients++;
454 nfsrv_openpluslock++;
457 NFSLOCKV4ROOTMUTEX();
458 nfsv4_unlock(&nfsv4rootfs_lock, 1);
459 NFSUNLOCKV4ROOTMUTEX();
461 if ((nd->nd_flag & ND_NFSV41) == 0) {
463 * Must wait until any outstanding callback on the old clp
467 while (clp->lc_cbref) {
468 clp->lc_flags |= LCL_WAKEUPWANTED;
469 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
473 nfsrv_zapclient(clp, p);
478 NFSEXITCODE2(error, nd);
483 * Check to see if the client id exists and optionally confirm it.
486 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp,
487 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram,
488 struct nfsrv_descript *nd, NFSPROC_T *p)
490 struct nfsclient *clp;
491 struct nfsstate *stp;
493 struct nfsclienthashhead *hp;
494 int error = 0, igotlock, doneok;
495 struct nfssessionhash *shp;
496 struct nfsdsession *sep;
498 static uint64_t next_sess = 0;
502 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 ||
503 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) {
504 error = NFSERR_STALECLIENTID;
509 * If called with opflags == CLOPS_RENEW, the State Lock is
510 * already held. Otherwise, we need to get either that or,
511 * for the case of Confirm, lock out the nfsd threads.
513 if (opflags & CLOPS_CONFIRM) {
514 NFSLOCKV4ROOTMUTEX();
515 nfsv4_relref(&nfsv4rootfs_lock);
517 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
518 NFSV4ROOTLOCKMUTEXPTR, NULL);
521 * Create a new sessionid here, since we need to do it where
522 * there is a mutex held to serialize update of next_sess.
524 if ((nd->nd_flag & ND_NFSV41) != 0) {
525 sessid[0] = ++next_sess;
526 sessid[1] = clientid.qval;
528 NFSUNLOCKV4ROOTMUTEX();
529 } else if (opflags != CLOPS_RENEW) {
533 /* For NFSv4.1, the clp is acquired from the associated session. */
534 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 &&
535 opflags == CLOPS_RENEW) {
537 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) {
538 shp = NFSSESSIONHASH(nd->nd_sessionid);
540 sep = nfsrv_findsession(nd->nd_sessionid);
543 NFSUNLOCKSESSION(shp);
546 hp = NFSCLIENTHASH(clientid);
547 LIST_FOREACH(clp, hp, lc_hash) {
548 if (clp->lc_clientid.lval[1] == clientid.lval[1])
553 if (opflags & CLOPS_CONFIRM)
554 error = NFSERR_STALECLIENTID;
556 error = NFSERR_EXPIRED;
557 } else if (clp->lc_flags & LCL_ADMINREVOKED) {
559 * If marked admin revoked, just return the error.
561 error = NFSERR_ADMINREVOKED;
564 if (opflags & CLOPS_CONFIRM) {
565 NFSLOCKV4ROOTMUTEX();
566 nfsv4_unlock(&nfsv4rootfs_lock, 1);
567 NFSUNLOCKV4ROOTMUTEX();
568 } else if (opflags != CLOPS_RENEW) {
575 * Perform any operations specified by the opflags.
577 if (opflags & CLOPS_CONFIRM) {
578 if (((nd->nd_flag & ND_NFSV41) != 0 &&
579 clp->lc_confirm.lval[0] != confirm.lval[0]) ||
580 ((nd->nd_flag & ND_NFSV41) == 0 &&
581 clp->lc_confirm.qval != confirm.qval))
582 error = NFSERR_STALECLIENTID;
583 else if (nfsrv_notsamecredname(nd, clp))
584 error = NFSERR_CLIDINUSE;
587 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) ==
590 * Hang onto the delegations (as old delegations)
591 * for an Open with CLAIM_DELEGATE_PREV unless in
592 * grace, but get rid of the rest of the state.
594 nfsrv_cleanclient(clp, p);
595 nfsrv_freedeleglist(&clp->lc_olddeleg);
596 if (nfsrv_checkgrace(nd, clp, 0)) {
597 /* In grace, so just delete delegations */
598 nfsrv_freedeleglist(&clp->lc_deleg);
600 LIST_FOREACH(stp, &clp->lc_deleg, ls_list)
601 stp->ls_flags |= NFSLCK_OLDDELEG;
602 clp->lc_delegtime = NFSD_MONOSEC +
603 nfsrv_lease + NFSRV_LEASEDELTA;
604 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg,
607 if ((nd->nd_flag & ND_NFSV41) != 0)
608 clp->lc_program = cbprogram;
610 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
612 clp->lc_flags |= LCL_NEEDSCBNULL;
613 /* For NFSv4.1, link the session onto the client. */
615 /* Hold a reference on the xprt for a backchannel. */
616 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN)
617 != 0 && clp->lc_req.nr_client == NULL) {
618 clp->lc_req.nr_client = (struct __rpc_client *)
619 clnt_bck_create(nd->nd_xprt->xp_socket,
620 cbprogram, NFSV4_CBVERS);
621 if (clp->lc_req.nr_client != NULL) {
622 SVC_ACQUIRE(nd->nd_xprt);
624 clp->lc_req.nr_client->cl_private;
625 /* Disable idle timeout. */
626 nd->nd_xprt->xp_idletimeout = 0;
627 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
629 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN;
631 NFSBCOPY(sessid, nsep->sess_sessionid,
633 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid,
635 shp = NFSSESSIONHASH(nsep->sess_sessionid);
638 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash);
639 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list);
640 nsep->sess_clp = clp;
641 NFSUNLOCKSESSION(shp);
645 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) {
646 error = NFSERR_EXPIRED;
650 * If called by the Renew Op, we must check the principal.
652 if (!error && (opflags & CLOPS_RENEWOP)) {
653 if (nfsrv_notsamecredname(nd, clp)) {
655 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) {
656 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
657 if ((stp->ls_flags & NFSLCK_OPEN) &&
658 stp->ls_uid == nd->nd_cred->cr_uid) {
665 error = NFSERR_ACCES;
667 if (!error && (clp->lc_flags & LCL_CBDOWN))
668 error = NFSERR_CBPATHDOWN;
670 if ((!error || error == NFSERR_CBPATHDOWN) &&
671 (opflags & CLOPS_RENEW)) {
672 clp->lc_expiry = nfsrv_leaseexpiry();
674 if (opflags & CLOPS_CONFIRM) {
675 NFSLOCKV4ROOTMUTEX();
676 nfsv4_unlock(&nfsv4rootfs_lock, 1);
677 NFSUNLOCKV4ROOTMUTEX();
678 } else if (opflags != CLOPS_RENEW) {
685 NFSEXITCODE2(error, nd);
690 * Perform the NFSv4.1 destroy clientid.
693 nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p)
695 struct nfsclient *clp;
696 struct nfsclienthashhead *hp;
697 int error = 0, i, igotlock;
699 if (nfsrvboottime != clientid.lval[0]) {
700 error = NFSERR_STALECLIENTID;
704 /* Lock out other nfsd threads */
705 NFSLOCKV4ROOTMUTEX();
706 nfsv4_relref(&nfsv4rootfs_lock);
708 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
709 NFSV4ROOTLOCKMUTEXPTR, NULL);
710 } while (igotlock == 0);
711 NFSUNLOCKV4ROOTMUTEX();
713 hp = NFSCLIENTHASH(clientid);
714 LIST_FOREACH(clp, hp, lc_hash) {
715 if (clp->lc_clientid.lval[1] == clientid.lval[1])
719 NFSLOCKV4ROOTMUTEX();
720 nfsv4_unlock(&nfsv4rootfs_lock, 1);
721 NFSUNLOCKV4ROOTMUTEX();
722 /* Just return ok, since it is gone. */
726 /* Scan for state on the clientid. */
727 for (i = 0; i < nfsrv_statehashsize; i++)
728 if (!LIST_EMPTY(&clp->lc_stateid[i])) {
729 NFSLOCKV4ROOTMUTEX();
730 nfsv4_unlock(&nfsv4rootfs_lock, 1);
731 NFSUNLOCKV4ROOTMUTEX();
732 error = NFSERR_CLIENTIDBUSY;
735 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) {
736 NFSLOCKV4ROOTMUTEX();
737 nfsv4_unlock(&nfsv4rootfs_lock, 1);
738 NFSUNLOCKV4ROOTMUTEX();
739 error = NFSERR_CLIENTIDBUSY;
743 /* Destroy the clientid and return ok. */
744 nfsrv_cleanclient(clp, p);
745 nfsrv_freedeleglist(&clp->lc_deleg);
746 nfsrv_freedeleglist(&clp->lc_olddeleg);
747 LIST_REMOVE(clp, lc_hash);
748 NFSLOCKV4ROOTMUTEX();
749 nfsv4_unlock(&nfsv4rootfs_lock, 1);
750 NFSUNLOCKV4ROOTMUTEX();
751 nfsrv_zapclient(clp, p);
753 NFSEXITCODE2(error, nd);
758 * Called from the new nfssvc syscall to admin revoke a clientid.
759 * Returns 0 for success, error otherwise.
762 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p)
764 struct nfsclient *clp = NULL;
769 * First, lock out the nfsd so that state won't change while the
770 * revocation record is being written to the stable storage restart
773 NFSLOCKV4ROOTMUTEX();
775 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
776 NFSV4ROOTLOCKMUTEXPTR, NULL);
778 NFSUNLOCKV4ROOTMUTEX();
781 * Search for a match in the client list.
784 while (i < nfsrv_clienthashsize && !gotit) {
785 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
786 if (revokep->nclid_idlen == clp->lc_idlen &&
787 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) {
795 NFSLOCKV4ROOTMUTEX();
796 nfsv4_unlock(&nfsv4rootfs_lock, 0);
797 NFSUNLOCKV4ROOTMUTEX();
803 * Now, write out the revocation record
805 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
806 nfsrv_backupstable();
809 * and clear out the state, marking the clientid revoked.
811 clp->lc_flags &= ~LCL_CALLBACKSON;
812 clp->lc_flags |= LCL_ADMINREVOKED;
813 nfsrv_cleanclient(clp, p);
814 nfsrv_freedeleglist(&clp->lc_deleg);
815 nfsrv_freedeleglist(&clp->lc_olddeleg);
816 NFSLOCKV4ROOTMUTEX();
817 nfsv4_unlock(&nfsv4rootfs_lock, 0);
818 NFSUNLOCKV4ROOTMUTEX();
826 * Dump out stats for all clients. Called from nfssvc(2), that is used
830 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt)
832 struct nfsclient *clp;
836 * First, get a reference on the nfsv4rootfs_lock so that an
837 * exclusive lock cannot be acquired while dumping the clients.
839 NFSLOCKV4ROOTMUTEX();
840 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
841 NFSUNLOCKV4ROOTMUTEX();
844 * Rattle through the client lists until done.
846 while (i < nfsrv_clienthashsize && cnt < maxcnt) {
847 clp = LIST_FIRST(&nfsclienthash[i]);
848 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) {
849 nfsrv_dumpaclient(clp, &dumpp[cnt]);
851 clp = LIST_NEXT(clp, lc_hash);
856 dumpp[cnt].ndcl_clid.nclid_idlen = 0;
858 NFSLOCKV4ROOTMUTEX();
859 nfsv4_relref(&nfsv4rootfs_lock);
860 NFSUNLOCKV4ROOTMUTEX();
864 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd.
867 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp)
869 struct nfsstate *stp, *openstp, *lckownstp;
871 struct sockaddr *sad;
872 struct sockaddr_in *rad;
873 struct sockaddr_in6 *rad6;
875 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0;
876 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0;
877 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0;
878 dumpp->ndcl_flags = clp->lc_flags;
879 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen;
880 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen);
881 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *);
882 dumpp->ndcl_addrfam = sad->sa_family;
883 if (sad->sa_family == AF_INET) {
884 rad = (struct sockaddr_in *)sad;
885 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr;
887 rad6 = (struct sockaddr_in6 *)sad;
888 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr;
892 * Now, scan the state lists and total up the opens and locks.
894 LIST_FOREACH(stp, &clp->lc_open, ls_list) {
895 dumpp->ndcl_nopenowners++;
896 LIST_FOREACH(openstp, &stp->ls_open, ls_list) {
897 dumpp->ndcl_nopens++;
898 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) {
899 dumpp->ndcl_nlockowners++;
900 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) {
901 dumpp->ndcl_nlocks++;
908 * and the delegation lists.
910 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
911 dumpp->ndcl_ndelegs++;
913 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
914 dumpp->ndcl_nolddelegs++;
919 * Dump out lock stats for a file.
922 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt,
925 struct nfsstate *stp;
928 struct nfslockfile *lfp;
929 struct sockaddr *sad;
930 struct sockaddr_in *rad;
931 struct sockaddr_in6 *rad6;
935 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p);
937 * First, get a reference on the nfsv4rootfs_lock so that an
938 * exclusive lock on it cannot be acquired while dumping the locks.
940 NFSLOCKV4ROOTMUTEX();
941 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
942 NFSUNLOCKV4ROOTMUTEX();
945 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0);
947 ldumpp[0].ndlck_clid.nclid_idlen = 0;
949 NFSLOCKV4ROOTMUTEX();
950 nfsv4_relref(&nfsv4rootfs_lock);
951 NFSUNLOCKV4ROOTMUTEX();
956 * For each open share on file, dump it out.
958 stp = LIST_FIRST(&lfp->lf_open);
959 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) {
960 ldumpp[cnt].ndlck_flags = stp->ls_flags;
961 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
962 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
963 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
964 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
965 ldumpp[cnt].ndlck_owner.nclid_idlen =
966 stp->ls_openowner->ls_ownerlen;
967 NFSBCOPY(stp->ls_openowner->ls_owner,
968 ldumpp[cnt].ndlck_owner.nclid_id,
969 stp->ls_openowner->ls_ownerlen);
970 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
971 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
972 stp->ls_clp->lc_idlen);
973 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *);
974 ldumpp[cnt].ndlck_addrfam = sad->sa_family;
975 if (sad->sa_family == AF_INET) {
976 rad = (struct sockaddr_in *)sad;
977 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr;
979 rad6 = (struct sockaddr_in6 *)sad;
980 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr;
982 stp = LIST_NEXT(stp, ls_file);
989 lop = LIST_FIRST(&lfp->lf_lock);
990 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) {
992 ldumpp[cnt].ndlck_flags = lop->lo_flags;
993 ldumpp[cnt].ndlck_first = lop->lo_first;
994 ldumpp[cnt].ndlck_end = lop->lo_end;
995 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
996 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
997 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
998 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
999 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen;
1000 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id,
1002 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
1003 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
1004 stp->ls_clp->lc_idlen);
1005 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *);
1006 ldumpp[cnt].ndlck_addrfam = sad->sa_family;
1007 if (sad->sa_family == AF_INET) {
1008 rad = (struct sockaddr_in *)sad;
1009 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr;
1011 rad6 = (struct sockaddr_in6 *)sad;
1012 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr;
1014 lop = LIST_NEXT(lop, lo_lckfile);
1019 * and the delegations.
1021 stp = LIST_FIRST(&lfp->lf_deleg);
1022 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) {
1023 ldumpp[cnt].ndlck_flags = stp->ls_flags;
1024 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
1025 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
1026 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
1027 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
1028 ldumpp[cnt].ndlck_owner.nclid_idlen = 0;
1029 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
1030 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
1031 stp->ls_clp->lc_idlen);
1032 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *);
1033 ldumpp[cnt].ndlck_addrfam = sad->sa_family;
1034 if (sad->sa_family == AF_INET) {
1035 rad = (struct sockaddr_in *)sad;
1036 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr;
1038 rad6 = (struct sockaddr_in6 *)sad;
1039 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr;
1041 stp = LIST_NEXT(stp, ls_file);
1046 * If list isn't full, mark end of list by setting the client name
1050 ldumpp[cnt].ndlck_clid.nclid_idlen = 0;
1052 NFSLOCKV4ROOTMUTEX();
1053 nfsv4_relref(&nfsv4rootfs_lock);
1054 NFSUNLOCKV4ROOTMUTEX();
1058 * Server timer routine. It can scan any linked list, so long
1059 * as it holds the spin/mutex lock and there is no exclusive lock on
1061 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok
1062 * to do this from a callout, since the spin locks work. For
1063 * Darwin, I'm not sure what will work correctly yet.)
1064 * Should be called once per second.
1067 nfsrv_servertimer(void)
1069 struct nfsclient *clp, *nclp;
1070 struct nfsstate *stp, *nstp;
1074 * Make sure nfsboottime is set. This is used by V3 as well
1075 * as V4. Note that nfsboottime is not nfsrvboottime, which is
1076 * only used by the V4 server for leases.
1078 if (nfsboottime.tv_sec == 0)
1079 NFSSETBOOTTIME(nfsboottime);
1082 * If server hasn't started yet, just return.
1085 if (nfsrv_stablefirst.nsf_eograce == 0) {
1089 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) {
1090 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) &&
1091 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce)
1092 nfsrv_stablefirst.nsf_flags |=
1093 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
1099 * Try and get a reference count on the nfsv4rootfs_lock so that
1100 * no nfsd thread can acquire an exclusive lock on it before this
1101 * call is done. If it is already exclusively locked, just return.
1103 NFSLOCKV4ROOTMUTEX();
1104 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock);
1105 NFSUNLOCKV4ROOTMUTEX();
1112 * For each client...
1114 for (i = 0; i < nfsrv_clienthashsize; i++) {
1115 clp = LIST_FIRST(&nfsclienthash[i]);
1116 while (clp != LIST_END(&nfsclienthash[i])) {
1117 nclp = LIST_NEXT(clp, lc_hash);
1118 if (!(clp->lc_flags & LCL_EXPIREIT)) {
1119 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC
1120 && ((LIST_EMPTY(&clp->lc_deleg)
1121 && LIST_EMPTY(&clp->lc_open)) ||
1122 nfsrv_clients > nfsrv_clienthighwater)) ||
1123 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC ||
1124 (clp->lc_expiry < NFSD_MONOSEC &&
1125 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) {
1127 * Lease has expired several nfsrv_lease times ago:
1129 * - no state is associated with it
1131 * - above high water mark for number of clients
1132 * (nfsrv_clienthighwater should be large enough
1133 * that this only occurs when clients fail to
1134 * use the same nfs_client_id4.id. Maybe somewhat
1135 * higher that the maximum number of clients that
1136 * will mount this server?)
1138 * Lease has expired a very long time ago
1140 * Lease has expired PLUS the number of opens + locks
1141 * has exceeded 90% of capacity
1143 * --> Mark for expiry. The actual expiry will be done
1144 * by an nfsd sometime soon.
1146 clp->lc_flags |= LCL_EXPIREIT;
1147 nfsrv_stablefirst.nsf_flags |=
1148 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT);
1151 * If there are no opens, increment no open tick cnt
1152 * If time exceeds NFSNOOPEN, mark it to be thrown away
1153 * otherwise, if there is an open, reset no open time
1154 * Hopefully, this will avoid excessive re-creation
1155 * of open owners and subsequent open confirms.
1157 stp = LIST_FIRST(&clp->lc_open);
1158 while (stp != LIST_END(&clp->lc_open)) {
1159 nstp = LIST_NEXT(stp, ls_list);
1160 if (LIST_EMPTY(&stp->ls_open)) {
1162 if (stp->ls_noopens > NFSNOOPEN ||
1163 (nfsrv_openpluslock * 2) >
1165 nfsrv_stablefirst.nsf_flags |=
1168 stp->ls_noopens = 0;
1178 NFSLOCKV4ROOTMUTEX();
1179 nfsv4_relref(&nfsv4rootfs_lock);
1180 NFSUNLOCKV4ROOTMUTEX();
1184 * The following set of functions free up the various data structures.
1187 * Clear out all open/lock state related to this nfsclient.
1188 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that
1189 * there are no other active nfsd threads.
1192 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p)
1194 struct nfsstate *stp, *nstp;
1195 struct nfsdsession *sep, *nsep;
1197 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp)
1198 nfsrv_freeopenowner(stp, 1, p);
1199 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0)
1200 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep)
1201 (void)nfsrv_freesession(sep, NULL);
1205 * Free a client that has been cleaned. It should also already have been
1206 * removed from the lists.
1207 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when
1208 * softclock interrupts are enabled.)
1211 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p)
1215 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) ==
1216 (LCL_GSS | LCL_CALLBACKSON) &&
1217 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) &&
1218 clp->lc_handlelen > 0) {
1219 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE;
1220 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED;
1221 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL,
1222 NULL, 0, NULL, NULL, NULL, p);
1225 newnfs_disconnect(&clp->lc_req);
1226 NFSSOCKADDRFREE(clp->lc_req.nr_nam);
1227 NFSFREEMUTEX(&clp->lc_req.nr_mtx);
1228 free(clp->lc_stateid, M_NFSDCLIENT);
1229 free(clp, M_NFSDCLIENT);
1231 nfsstatsv1.srvclients--;
1232 nfsrv_openpluslock--;
1238 * Free a list of delegation state structures.
1239 * (This function will also free all nfslockfile structures that no
1240 * longer have associated state.)
1243 nfsrv_freedeleglist(struct nfsstatehead *sthp)
1245 struct nfsstate *stp, *nstp;
1247 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) {
1248 nfsrv_freedeleg(stp);
1254 * Free up a delegation.
1257 nfsrv_freedeleg(struct nfsstate *stp)
1259 struct nfslockfile *lfp;
1261 LIST_REMOVE(stp, ls_hash);
1262 LIST_REMOVE(stp, ls_list);
1263 LIST_REMOVE(stp, ls_file);
1265 if (LIST_EMPTY(&lfp->lf_open) &&
1266 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) &&
1267 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
1268 lfp->lf_usecount == 0 &&
1269 nfsv4_testlock(&lfp->lf_locallock_lck) == 0)
1270 nfsrv_freenfslockfile(lfp);
1271 FREE((caddr_t)stp, M_NFSDSTATE);
1272 nfsstatsv1.srvdelegates--;
1273 nfsrv_openpluslock--;
1274 nfsrv_delegatecnt--;
1278 * This function frees an open owner and all associated opens.
1281 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p)
1283 struct nfsstate *nstp, *tstp;
1285 LIST_REMOVE(stp, ls_list);
1287 * Now, free all associated opens.
1289 nstp = LIST_FIRST(&stp->ls_open);
1290 while (nstp != LIST_END(&stp->ls_open)) {
1292 nstp = LIST_NEXT(nstp, ls_list);
1293 (void) nfsrv_freeopen(tstp, NULL, cansleep, p);
1296 nfsrvd_derefcache(stp->ls_op);
1297 FREE((caddr_t)stp, M_NFSDSTATE);
1298 nfsstatsv1.srvopenowners--;
1299 nfsrv_openpluslock--;
1303 * This function frees an open (nfsstate open structure) with all associated
1304 * lock_owners and locks. It also frees the nfslockfile structure iff there
1305 * are no other opens on the file.
1306 * Returns 1 if it free'd the nfslockfile, 0 otherwise.
1309 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p)
1311 struct nfsstate *nstp, *tstp;
1312 struct nfslockfile *lfp;
1315 LIST_REMOVE(stp, ls_hash);
1316 LIST_REMOVE(stp, ls_list);
1317 LIST_REMOVE(stp, ls_file);
1321 * Now, free all lockowners associated with this open.
1323 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp)
1324 nfsrv_freelockowner(tstp, vp, cansleep, p);
1327 * The nfslockfile is freed here if there are no locks
1328 * associated with the open.
1329 * If there are locks associated with the open, the
1330 * nfslockfile structure can be freed via nfsrv_freelockowner().
1331 * Acquire the state mutex to avoid races with calls to
1332 * nfsrv_getlockfile().
1336 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) &&
1337 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) &&
1338 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
1339 lfp->lf_usecount == 0 &&
1340 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) {
1341 nfsrv_freenfslockfile(lfp);
1347 FREE((caddr_t)stp, M_NFSDSTATE);
1348 nfsstatsv1.srvopens--;
1349 nfsrv_openpluslock--;
1354 * Frees a lockowner and all associated locks.
1357 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
1361 LIST_REMOVE(stp, ls_hash);
1362 LIST_REMOVE(stp, ls_list);
1363 nfsrv_freeallnfslocks(stp, vp, cansleep, p);
1365 nfsrvd_derefcache(stp->ls_op);
1366 FREE((caddr_t)stp, M_NFSDSTATE);
1367 nfsstatsv1.srvlockowners--;
1368 nfsrv_openpluslock--;
1372 * Free all the nfs locks on a lockowner.
1375 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep,
1378 struct nfslock *lop, *nlop;
1379 struct nfsrollback *rlp, *nrlp;
1380 struct nfslockfile *lfp = NULL;
1383 uint64_t first, end;
1386 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked");
1387 lop = LIST_FIRST(&stp->ls_lock);
1388 while (lop != LIST_END(&stp->ls_lock)) {
1389 nlop = LIST_NEXT(lop, lo_lckowner);
1391 * Since all locks should be for the same file, lfp should
1396 else if (lfp != lop->lo_lfp)
1397 panic("allnfslocks");
1399 * If vp is NULL and cansleep != 0, a vnode must be acquired
1400 * from the file handle. This only occurs when called from
1401 * nfsrv_cleanclient().
1404 if (nfsrv_dolocallocks == 0)
1406 else if (vp == NULL && cansleep != 0) {
1407 tvp = nfsvno_getvp(&lfp->lf_fh);
1408 NFSVOPUNLOCK(tvp, 0);
1417 first = lop->lo_first;
1419 nfsrv_freenfslock(lop);
1420 nfsrv_localunlock(tvp, lfp, first, end, p);
1421 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list,
1423 free(rlp, M_NFSDROLLBACK);
1424 LIST_INIT(&lfp->lf_rollback);
1426 nfsrv_freenfslock(lop);
1429 if (vp == NULL && tvp != NULL)
1434 * Free an nfslock structure.
1437 nfsrv_freenfslock(struct nfslock *lop)
1440 if (lop->lo_lckfile.le_prev != NULL) {
1441 LIST_REMOVE(lop, lo_lckfile);
1442 nfsstatsv1.srvlocks--;
1443 nfsrv_openpluslock--;
1445 LIST_REMOVE(lop, lo_lckowner);
1446 FREE((caddr_t)lop, M_NFSDLOCK);
1450 * This function frees an nfslockfile structure.
1453 nfsrv_freenfslockfile(struct nfslockfile *lfp)
1456 LIST_REMOVE(lfp, lf_hash);
1457 FREE((caddr_t)lfp, M_NFSDLOCKFILE);
1461 * This function looks up an nfsstate structure via stateid.
1464 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags,
1465 struct nfsstate **stpp)
1467 struct nfsstate *stp;
1468 struct nfsstatehead *hp;
1472 hp = NFSSTATEHASH(clp, *stateidp);
1473 LIST_FOREACH(stp, hp, ls_hash) {
1474 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
1480 * If no state id in list, return NFSERR_BADSTATEID.
1482 if (stp == LIST_END(hp)) {
1483 error = NFSERR_BADSTATEID;
1494 * This function gets an nfsstate structure via owner string.
1497 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
1498 struct nfsstate **stpp)
1500 struct nfsstate *stp;
1503 LIST_FOREACH(stp, hp, ls_list) {
1504 if (new_stp->ls_ownerlen == stp->ls_ownerlen &&
1505 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) {
1513 * Lock control function called to update lock status.
1514 * Returns 0 upon success, -1 if there is no lock and the flags indicate
1515 * that one isn't to be created and an NFSERR_xxx for other errors.
1516 * The structures new_stp and new_lop are passed in as pointers that should
1517 * be set to NULL if the structure is used and shouldn't be free'd.
1518 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are
1519 * never used and can safely be allocated on the stack. For all other
1520 * cases, *new_stpp and *new_lopp should be malloc'd before the call,
1521 * in case they are used.
1524 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp,
1525 struct nfslock **new_lopp, struct nfslockconflict *cfp,
1526 nfsquad_t clientid, nfsv4stateid_t *stateidp,
1527 __unused struct nfsexstuff *exp,
1528 struct nfsrv_descript *nd, NFSPROC_T *p)
1530 struct nfslock *lop;
1531 struct nfsstate *new_stp = *new_stpp;
1532 struct nfslock *new_lop = *new_lopp;
1533 struct nfsstate *tstp, *mystp, *nstp;
1535 struct nfslockfile *lfp;
1536 struct nfslock *other_lop = NULL;
1537 struct nfsstate *stp, *lckstp = NULL;
1538 struct nfsclient *clp = NULL;
1540 int error = 0, haslock = 0, ret, reterr;
1541 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0;
1543 uint64_t first, end;
1544 uint32_t lock_flags;
1546 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) {
1548 * Note the special cases of "all 1s" or "all 0s" stateids and
1549 * let reads with all 1s go ahead.
1551 if (new_stp->ls_stateid.seqid == 0x0 &&
1552 new_stp->ls_stateid.other[0] == 0x0 &&
1553 new_stp->ls_stateid.other[1] == 0x0 &&
1554 new_stp->ls_stateid.other[2] == 0x0)
1556 else if (new_stp->ls_stateid.seqid == 0xffffffff &&
1557 new_stp->ls_stateid.other[0] == 0xffffffff &&
1558 new_stp->ls_stateid.other[1] == 0xffffffff &&
1559 new_stp->ls_stateid.other[2] == 0xffffffff)
1564 * Check for restart conditions (client and server).
1566 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
1567 &new_stp->ls_stateid, specialid);
1572 * Check for state resource limit exceeded.
1574 if ((new_stp->ls_flags & NFSLCK_LOCK) &&
1575 nfsrv_openpluslock > nfsrv_v4statelimit) {
1576 error = NFSERR_RESOURCE;
1581 * For the lock case, get another nfslock structure,
1582 * just in case we need it.
1583 * Malloc now, before we start sifting through the linked lists,
1584 * in case we have to wait for memory.
1587 if (new_stp->ls_flags & NFSLCK_LOCK)
1588 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock),
1589 M_NFSDLOCK, M_WAITOK);
1590 filestruct_locked = 0;
1595 * Get the lockfile structure for CFH now, so we can do a sanity
1596 * check against the stateid, before incrementing the seqid#, since
1597 * we want to return NFSERR_BADSTATEID on failure and the seqid#
1598 * shouldn't be incremented for this case.
1599 * If nfsrv_getlockfile() returns -1, it means "not found", which
1600 * will be handled later.
1601 * If we are doing Lock/LockU and local locking is enabled, sleep
1602 * lock the nfslockfile structure.
1604 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p);
1606 if (getlckret == 0) {
1607 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 &&
1608 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) {
1609 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
1612 filestruct_locked = 1;
1614 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
1617 if (getlckret != 0 && getlckret != -1)
1620 if (filestruct_locked != 0) {
1621 LIST_INIT(&lfp->lf_rollback);
1622 if ((new_stp->ls_flags & NFSLCK_LOCK)) {
1624 * For local locking, do the advisory locking now, so
1625 * that any conflict can be detected. A failure later
1626 * can be rolled back locally. If an error is returned,
1627 * struct nfslockfile has been unlocked and any local
1628 * locking rolled back.
1631 if (vnode_unlocked == 0) {
1632 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1");
1634 NFSVOPUNLOCK(vp, 0);
1636 reterr = nfsrv_locallock(vp, lfp,
1637 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)),
1638 new_lop->lo_first, new_lop->lo_end, cfp, p);
1643 if (specialid == 0) {
1644 if (new_stp->ls_flags & NFSLCK_TEST) {
1646 * RFC 3530 does not list LockT as an op that renews a
1647 * lease, but the consensus seems to be that it is ok
1648 * for a server to do so.
1650 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
1651 (nfsquad_t)((u_quad_t)0), 0, nd, p);
1654 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid
1655 * error returns for LockT, just go ahead and test for a lock,
1656 * since there are no locks for this client, but other locks
1657 * can conflict. (ie. same client will always be false)
1659 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED)
1663 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
1664 (nfsquad_t)((u_quad_t)0), 0, nd, p);
1667 * Look up the stateid
1669 error = nfsrv_getstate(clp, &new_stp->ls_stateid,
1670 new_stp->ls_flags, &stp);
1672 * do some sanity checks for an unconfirmed open or a
1673 * stateid that refers to the wrong file, for an open stateid
1675 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) &&
1676 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) ||
1677 (getlckret == 0 && stp->ls_lfp != lfp))){
1679 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID
1680 * The only exception is using SETATTR with SIZE.
1682 if ((new_stp->ls_flags &
1683 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR)
1684 error = NFSERR_BADSTATEID;
1688 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) &&
1689 getlckret == 0 && stp->ls_lfp != lfp)
1690 error = NFSERR_BADSTATEID;
1693 * If the lockowner stateid doesn't refer to the same file,
1694 * I believe that is considered ok, since some clients will
1695 * only create a single lockowner and use that for all locks
1697 * For now, log it as a diagnostic, instead of considering it
1700 if (error == 0 && (stp->ls_flags &
1701 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 &&
1702 getlckret == 0 && stp->ls_lfp != lfp) {
1704 printf("Got a lock statid for different file open\n");
1707 error = NFSERR_BADSTATEID;
1712 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) {
1714 * If haslock set, we've already checked the seqid.
1717 if (stp->ls_flags & NFSLCK_OPEN)
1718 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
1719 stp->ls_openowner, new_stp->ls_op);
1721 error = NFSERR_BADSTATEID;
1724 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp);
1727 * I believe this should be an error, but it
1728 * isn't obvious what NFSERR_xxx would be
1729 * appropriate, so I'll use NFSERR_INVAL for now.
1731 error = NFSERR_INVAL;
1734 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) {
1736 * If haslock set, ditto above.
1739 if (stp->ls_flags & NFSLCK_OPEN)
1740 error = NFSERR_BADSTATEID;
1742 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
1743 stp, new_stp->ls_op);
1751 * If the seqid part of the stateid isn't the same, return
1752 * NFSERR_OLDSTATEID for cases other than I/O Ops.
1753 * For I/O Ops, only return NFSERR_OLDSTATEID if
1754 * nfsrv_returnoldstateid is set. (The consensus on the email
1755 * list was that most clients would prefer to not receive
1756 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that
1757 * is what will happen, so I use the nfsrv_returnoldstateid to
1758 * allow for either server configuration.)
1760 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid &&
1761 (((nd->nd_flag & ND_NFSV41) == 0 &&
1762 (!(new_stp->ls_flags & NFSLCK_CHECK) ||
1763 nfsrv_returnoldstateid)) ||
1764 ((nd->nd_flag & ND_NFSV41) != 0 &&
1765 new_stp->ls_stateid.seqid != 0)))
1766 error = NFSERR_OLDSTATEID;
1771 * Now we can check for grace.
1774 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
1775 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
1776 nfsrv_checkstable(clp))
1777 error = NFSERR_NOGRACE;
1779 * If we successfully Reclaimed state, note that.
1781 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error)
1782 nfsrv_markstable(clp);
1785 * At this point, either error == NFSERR_BADSTATEID or the
1786 * seqid# has been updated, so we can return any error.
1787 * If error == 0, there may be an error in:
1788 * nd_repstat - Set by the calling function.
1789 * reterr - Set above, if getting the nfslockfile structure
1790 * or acquiring the local lock failed.
1791 * (If both of these are set, nd_repstat should probably be
1792 * returned, since that error was detected before this
1795 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) {
1797 if (nd->nd_repstat != 0)
1798 error = nd->nd_repstat;
1802 if (filestruct_locked != 0) {
1803 /* Roll back local locks. */
1805 if (vnode_unlocked == 0) {
1806 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2");
1808 NFSVOPUNLOCK(vp, 0);
1810 nfsrv_locallock_rollback(vp, lfp, p);
1812 nfsrv_unlocklf(lfp);
1819 * Check the nfsrv_getlockfile return.
1820 * Returned -1 if no structure found.
1822 if (getlckret == -1) {
1823 error = NFSERR_EXPIRED;
1825 * Called from lockt, so no lock is OK.
1827 if (new_stp->ls_flags & NFSLCK_TEST) {
1829 } else if (new_stp->ls_flags &
1830 (NFSLCK_CHECK | NFSLCK_SETATTR)) {
1832 * Called to check for a lock, OK if the stateid is all
1833 * 1s or all 0s, but there should be an nfsstate
1835 * (ie. If there is no open, I'll assume no share
1841 error = NFSERR_BADSTATEID;
1848 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict.
1849 * For NFSLCK_CHECK, allow a read if write access is granted,
1850 * but check for a deny. For NFSLCK_LOCK, require correct access,
1851 * which implies a conflicting deny can't exist.
1853 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) {
1855 * Four kinds of state id:
1856 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK
1857 * - stateid for an open
1858 * - stateid for a delegation
1859 * - stateid for a lock owner
1862 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
1865 nfsrv_delaydelegtimeout(stp);
1866 } else if (stp->ls_flags & NFSLCK_OPEN) {
1869 mystp = stp->ls_openstp;
1872 * If locking or checking, require correct access
1875 if (((new_stp->ls_flags & NFSLCK_LOCK) &&
1876 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) &
1877 mystp->ls_flags & NFSLCK_ACCESSBITS)) ||
1878 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) ==
1879 (NFSLCK_CHECK | NFSLCK_READACCESS) &&
1880 !(mystp->ls_flags & NFSLCK_READACCESS) &&
1881 nfsrv_allowreadforwriteopen == 0) ||
1882 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) ==
1883 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) &&
1884 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) {
1885 if (filestruct_locked != 0) {
1886 /* Roll back local locks. */
1888 if (vnode_unlocked == 0) {
1889 ASSERT_VOP_ELOCKED(vp,
1892 NFSVOPUNLOCK(vp, 0);
1894 nfsrv_locallock_rollback(vp, lfp, p);
1896 nfsrv_unlocklf(lfp);
1899 error = NFSERR_OPENMODE;
1904 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) {
1906 * Check for a conflicting deny bit.
1908 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) {
1909 if (tstp != mystp) {
1910 bits = tstp->ls_flags;
1911 bits >>= NFSLCK_SHIFT;
1912 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) {
1913 KASSERT(vnode_unlocked == 0,
1914 ("nfsrv_lockctrl: vnode unlocked1"));
1915 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock,
1919 * nfsrv_clientconflict unlocks state
1920 * when it returns non-zero.
1928 error = NFSERR_PERM;
1930 error = NFSERR_OPENMODE;
1936 /* We're outta here */
1943 * For setattr, just get rid of all the Delegations for other clients.
1945 if (new_stp->ls_flags & NFSLCK_SETATTR) {
1946 KASSERT(vnode_unlocked == 0,
1947 ("nfsrv_lockctrl: vnode unlocked2"));
1948 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p);
1951 * nfsrv_cleandeleg() unlocks state when it
1961 if (!(new_stp->ls_flags & NFSLCK_CHECK) ||
1962 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) &&
1963 LIST_EMPTY(&lfp->lf_deleg))) {
1970 * Check for a conflicting delegation. If one is found, call
1971 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
1972 * been set yet, it will get the lock. Otherwise, it will recall
1973 * the delegation. Then, we try try again...
1974 * I currently believe the conflict algorithm to be:
1975 * For Lock Ops (Lock/LockT/LockU)
1976 * - there is a conflict iff a different client has a write delegation
1977 * For Reading (Read Op)
1978 * - there is a conflict iff a different client has a write delegation
1979 * (the specialids are always a different client)
1980 * For Writing (Write/Setattr of size)
1981 * - there is a conflict if a different client has any delegation
1982 * - there is a conflict if the same client has a read delegation
1983 * (I don't understand why this isn't allowed, but that seems to be
1984 * the current consensus?)
1986 tstp = LIST_FIRST(&lfp->lf_deleg);
1987 while (tstp != LIST_END(&lfp->lf_deleg)) {
1988 nstp = LIST_NEXT(tstp, ls_file);
1989 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))||
1990 ((new_stp->ls_flags & NFSLCK_CHECK) &&
1991 (new_lop->lo_flags & NFSLCK_READ))) &&
1992 clp != tstp->ls_clp &&
1993 (tstp->ls_flags & NFSLCK_DELEGWRITE)) ||
1994 ((new_stp->ls_flags & NFSLCK_CHECK) &&
1995 (new_lop->lo_flags & NFSLCK_WRITE) &&
1996 (clp != tstp->ls_clp ||
1997 (tstp->ls_flags & NFSLCK_DELEGREAD)))) {
1999 if (filestruct_locked != 0) {
2000 /* Roll back local locks. */
2002 if (vnode_unlocked == 0) {
2003 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4");
2004 NFSVOPUNLOCK(vp, 0);
2006 nfsrv_locallock_rollback(vp, lfp, p);
2008 nfsrv_unlocklf(lfp);
2010 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2012 if ((vp->v_iflag & VI_DOOMED) != 0)
2013 ret = NFSERR_SERVERFAULT;
2017 ret = nfsrv_delegconflict(tstp, &haslock, p, vp);
2020 * nfsrv_delegconflict unlocks state when it
2021 * returns non-zero, which it always does.
2024 FREE((caddr_t)other_lop, M_NFSDLOCK);
2034 /* Never gets here. */
2040 * Handle the unlock case by calling nfsrv_updatelock().
2041 * (Should I have done some access checking above for unlock? For now,
2042 * just let it happen.)
2044 if (new_stp->ls_flags & NFSLCK_UNLOCK) {
2045 first = new_lop->lo_first;
2046 end = new_lop->lo_end;
2047 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp);
2048 stateidp->seqid = ++(stp->ls_stateid.seqid);
2049 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
2050 stateidp->seqid = stp->ls_stateid.seqid = 1;
2051 stateidp->other[0] = stp->ls_stateid.other[0];
2052 stateidp->other[1] = stp->ls_stateid.other[1];
2053 stateidp->other[2] = stp->ls_stateid.other[2];
2054 if (filestruct_locked != 0) {
2056 if (vnode_unlocked == 0) {
2057 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5");
2059 NFSVOPUNLOCK(vp, 0);
2061 /* Update the local locks. */
2062 nfsrv_localunlock(vp, lfp, first, end, p);
2064 nfsrv_unlocklf(lfp);
2071 * Search for a conflicting lock. A lock conflicts if:
2072 * - the lock range overlaps and
2073 * - at least one lock is a write lock and
2074 * - it is not owned by the same lock owner
2077 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
2078 if (new_lop->lo_end > lop->lo_first &&
2079 new_lop->lo_first < lop->lo_end &&
2080 (new_lop->lo_flags == NFSLCK_WRITE ||
2081 lop->lo_flags == NFSLCK_WRITE) &&
2082 lckstp != lop->lo_stp &&
2083 (clp != lop->lo_stp->ls_clp ||
2084 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen ||
2085 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner,
2086 lckstp->ls_ownerlen))) {
2088 FREE((caddr_t)other_lop, M_NFSDLOCK);
2091 if (vnode_unlocked != 0)
2092 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
2095 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
2098 if (filestruct_locked != 0) {
2099 if (vnode_unlocked == 0) {
2100 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6");
2101 NFSVOPUNLOCK(vp, 0);
2103 /* Roll back local locks. */
2104 nfsrv_locallock_rollback(vp, lfp, p);
2106 nfsrv_unlocklf(lfp);
2108 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2110 if ((vp->v_iflag & VI_DOOMED) != 0) {
2111 error = NFSERR_SERVERFAULT;
2116 * nfsrv_clientconflict() unlocks state when it
2123 * Found a conflicting lock, so record the conflict and
2126 if (cfp != NULL && ret == 0) {
2127 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0];
2128 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1];
2129 cfp->cl_first = lop->lo_first;
2130 cfp->cl_end = lop->lo_end;
2131 cfp->cl_flags = lop->lo_flags;
2132 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen;
2133 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner,
2137 error = NFSERR_PERM;
2138 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2139 error = NFSERR_RECLAIMCONFLICT;
2140 else if (new_stp->ls_flags & NFSLCK_CHECK)
2141 error = NFSERR_LOCKED;
2143 error = NFSERR_DENIED;
2144 if (filestruct_locked != 0 && ret == 0) {
2145 /* Roll back local locks. */
2147 if (vnode_unlocked == 0) {
2148 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7");
2150 NFSVOPUNLOCK(vp, 0);
2152 nfsrv_locallock_rollback(vp, lfp, p);
2154 nfsrv_unlocklf(lfp);
2164 * We only get here if there was no lock that conflicted.
2166 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) {
2172 * We only get here when we are creating or modifying a lock.
2173 * There are two variants:
2174 * - exist_lock_owner where lock_owner exists
2175 * - open_to_lock_owner with new lock_owner
2177 first = new_lop->lo_first;
2178 end = new_lop->lo_end;
2179 lock_flags = new_lop->lo_flags;
2180 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) {
2181 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp);
2182 stateidp->seqid = ++(lckstp->ls_stateid.seqid);
2183 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
2184 stateidp->seqid = lckstp->ls_stateid.seqid = 1;
2185 stateidp->other[0] = lckstp->ls_stateid.other[0];
2186 stateidp->other[1] = lckstp->ls_stateid.other[1];
2187 stateidp->other[2] = lckstp->ls_stateid.other[2];
2190 * The new open_to_lock_owner case.
2191 * Link the new nfsstate into the lists.
2193 new_stp->ls_seq = new_stp->ls_opentolockseq;
2194 nfsrvd_refcache(new_stp->ls_op);
2195 stateidp->seqid = new_stp->ls_stateid.seqid = 1;
2196 stateidp->other[0] = new_stp->ls_stateid.other[0] =
2197 clp->lc_clientid.lval[0];
2198 stateidp->other[1] = new_stp->ls_stateid.other[1] =
2199 clp->lc_clientid.lval[1];
2200 stateidp->other[2] = new_stp->ls_stateid.other[2] =
2201 nfsrv_nextstateindex(clp);
2202 new_stp->ls_clp = clp;
2203 LIST_INIT(&new_stp->ls_lock);
2204 new_stp->ls_openstp = stp;
2205 new_stp->ls_lfp = lfp;
2206 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp,
2208 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid),
2210 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list);
2213 nfsstatsv1.srvlockowners++;
2214 nfsrv_openpluslock++;
2216 if (filestruct_locked != 0) {
2218 nfsrv_locallock_commit(lfp, lock_flags, first, end);
2220 nfsrv_unlocklf(lfp);
2226 NFSLOCKV4ROOTMUTEX();
2227 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2228 NFSUNLOCKV4ROOTMUTEX();
2230 if (vnode_unlocked != 0) {
2231 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2232 if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0)
2233 error = NFSERR_SERVERFAULT;
2236 FREE((caddr_t)other_lop, M_NFSDLOCK);
2237 NFSEXITCODE2(error, nd);
2242 * Check for state errors for Open.
2243 * repstat is passed back out as an error if more critical errors
2247 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp,
2248 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd,
2249 NFSPROC_T *p, int repstat)
2251 struct nfsstate *stp, *nstp;
2252 struct nfsclient *clp;
2253 struct nfsstate *ownerstp;
2254 struct nfslockfile *lfp, *new_lfp;
2255 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0;
2257 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
2260 * Check for restart conditions (client and server).
2262 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
2263 &new_stp->ls_stateid, 0);
2268 * Check for state resource limit exceeded.
2269 * Technically this should be SMP protected, but the worst
2270 * case error is "out by one or two" on the count when it
2271 * returns NFSERR_RESOURCE and the limit is just a rather
2272 * arbitrary high water mark, so no harm is done.
2274 if (nfsrv_openpluslock > nfsrv_v4statelimit) {
2275 error = NFSERR_RESOURCE;
2280 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile),
2281 M_NFSDLOCKFILE, M_WAITOK);
2283 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
2287 * Get the nfsclient structure.
2289 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
2290 (nfsquad_t)((u_quad_t)0), 0, nd, p);
2293 * Look up the open owner. See if it needs confirmation and
2294 * check the seq#, as required.
2297 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
2299 if (!error && ownerstp) {
2300 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp,
2303 * If the OpenOwner hasn't been confirmed, assume the
2304 * old one was a replay and this one is ok.
2305 * See: RFC3530 Sec. 14.2.18.
2307 if (error == NFSERR_BADSEQID &&
2308 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM))
2316 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
2317 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
2318 nfsrv_checkstable(clp))
2319 error = NFSERR_NOGRACE;
2322 * If none of the above errors occurred, let repstat be
2325 if (repstat && !error)
2330 NFSLOCKV4ROOTMUTEX();
2331 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2332 NFSUNLOCKV4ROOTMUTEX();
2334 free((caddr_t)new_lfp, M_NFSDLOCKFILE);
2339 * If vp == NULL, the file doesn't exist yet, so return ok.
2340 * (This always happens on the first pass, so haslock must be 0.)
2344 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE);
2349 * Get the structure for the underlying file.
2354 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
2357 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE);
2361 NFSLOCKV4ROOTMUTEX();
2362 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2363 NFSUNLOCKV4ROOTMUTEX();
2369 * Search for a conflicting open/share.
2371 if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
2373 * For Delegate_Cur, search for the matching Delegation,
2374 * which indicates no conflict.
2375 * An old delegation should have been recovered by the
2376 * client doing a Claim_DELEGATE_Prev, so I won't let
2377 * it match and return NFSERR_EXPIRED. Should I let it
2380 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
2381 if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
2382 (((nd->nd_flag & ND_NFSV41) != 0 &&
2383 stateidp->seqid == 0) ||
2384 stateidp->seqid == stp->ls_stateid.seqid) &&
2385 !NFSBCMP(stateidp->other, stp->ls_stateid.other,
2389 if (stp == LIST_END(&lfp->lf_deleg) ||
2390 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
2391 (stp->ls_flags & NFSLCK_DELEGREAD))) {
2394 NFSLOCKV4ROOTMUTEX();
2395 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2396 NFSUNLOCKV4ROOTMUTEX();
2398 error = NFSERR_EXPIRED;
2404 * Check for access/deny bit conflicts. I check for the same
2405 * owner as well, in case the client didn't bother.
2407 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
2408 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) &&
2409 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
2410 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
2411 ((stp->ls_flags & NFSLCK_ACCESSBITS) &
2412 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){
2413 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
2416 * nfsrv_clientconflict() unlocks
2417 * state when it returns non-zero.
2422 error = NFSERR_PERM;
2423 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2424 error = NFSERR_RECLAIMCONFLICT;
2426 error = NFSERR_SHAREDENIED;
2430 NFSLOCKV4ROOTMUTEX();
2431 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2432 NFSUNLOCKV4ROOTMUTEX();
2439 * Check for a conflicting delegation. If one is found, call
2440 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
2441 * been set yet, it will get the lock. Otherwise, it will recall
2442 * the delegation. Then, we try try again...
2443 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there
2444 * isn't a conflict.)
2445 * I currently believe the conflict algorithm to be:
2446 * For Open with Read Access and Deny None
2447 * - there is a conflict iff a different client has a write delegation
2448 * For Open with other Write Access or any Deny except None
2449 * - there is a conflict if a different client has any delegation
2450 * - there is a conflict if the same client has a read delegation
2451 * (The current consensus is that this last case should be
2452 * considered a conflict since the client with a read delegation
2453 * could have done an Open with ReadAccess and WriteDeny
2454 * locally and then not have checked for the WriteDeny.)
2455 * Don't check for a Reclaim, since that will be dealt with
2456 * by nfsrv_openctrl().
2458 if (!(new_stp->ls_flags &
2459 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) {
2460 stp = LIST_FIRST(&lfp->lf_deleg);
2461 while (stp != LIST_END(&lfp->lf_deleg)) {
2462 nstp = LIST_NEXT(stp, ls_file);
2463 if ((readonly && stp->ls_clp != clp &&
2464 (stp->ls_flags & NFSLCK_DELEGWRITE)) ||
2465 (!readonly && (stp->ls_clp != clp ||
2466 (stp->ls_flags & NFSLCK_DELEGREAD)))) {
2467 ret = nfsrv_delegconflict(stp, &haslock, p, vp);
2470 * nfsrv_delegconflict() unlocks state
2471 * when it returns non-zero.
2484 NFSLOCKV4ROOTMUTEX();
2485 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2486 NFSUNLOCKV4ROOTMUTEX();
2490 NFSEXITCODE2(error, nd);
2495 * Open control function to create/update open state for an open.
2498 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp,
2499 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp,
2500 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp,
2501 NFSPROC_T *p, u_quad_t filerev)
2503 struct nfsstate *new_stp = *new_stpp;
2504 struct nfsstate *stp, *nstp;
2505 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg;
2506 struct nfslockfile *lfp, *new_lfp;
2507 struct nfsclient *clp;
2508 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1;
2509 int readonly = 0, cbret = 1, getfhret = 0;
2510 int gotstate = 0, len = 0;
2511 u_char *clidp = NULL;
2513 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
2516 * Check for restart conditions (client and server).
2517 * (Paranoia, should have been detected by nfsrv_opencheck().)
2518 * If an error does show up, return NFSERR_EXPIRED, since the
2519 * the seqid# has already been incremented.
2521 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
2522 &new_stp->ls_stateid, 0);
2524 printf("Nfsd: openctrl unexpected restart err=%d\n",
2526 error = NFSERR_EXPIRED;
2530 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
2532 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile),
2533 M_NFSDLOCKFILE, M_WAITOK);
2534 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate),
2535 M_NFSDSTATE, M_WAITOK);
2536 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate),
2537 M_NFSDSTATE, M_WAITOK);
2538 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
2542 * Get the client structure. Since the linked lists could be changed
2543 * by other nfsd processes if this process does a tsleep(), one of
2544 * two things must be done.
2545 * 1 - don't tsleep()
2547 * 2 - get the nfsv4_lock() { indicated by haslock == 1 }
2548 * before using the lists, since this lock stops the other
2549 * nfsd. This should only be used for rare cases, since it
2550 * essentially single threads the nfsd.
2551 * At this time, it is only done for cases where the stable
2552 * storage file must be written prior to completion of state
2555 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
2556 (nfsquad_t)((u_quad_t)0), 0, nd, p);
2557 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) &&
2560 * This happens on the first open for a client
2561 * that supports callbacks.
2565 * Although nfsrv_docallback() will sleep, clp won't
2566 * go away, since they are only removed when the
2567 * nfsv4_lock() has blocked the nfsd threads. The
2568 * fields in clp can change, but having multiple
2569 * threads do this Null callback RPC should be
2572 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL,
2573 NULL, 0, NULL, NULL, NULL, p);
2575 clp->lc_flags &= ~LCL_NEEDSCBNULL;
2577 clp->lc_flags |= LCL_CALLBACKSON;
2581 * Look up the open owner. See if it needs confirmation and
2582 * check the seq#, as required.
2585 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
2589 printf("Nfsd: openctrl unexpected state err=%d\n",
2591 free((caddr_t)new_lfp, M_NFSDLOCKFILE);
2592 free((caddr_t)new_open, M_NFSDSTATE);
2593 free((caddr_t)new_deleg, M_NFSDSTATE);
2595 NFSLOCKV4ROOTMUTEX();
2596 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2597 NFSUNLOCKV4ROOTMUTEX();
2599 error = NFSERR_EXPIRED;
2603 if (new_stp->ls_flags & NFSLCK_RECLAIM)
2604 nfsrv_markstable(clp);
2607 * Get the structure for the underlying file.
2612 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
2615 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE);
2618 printf("Nfsd openctrl unexpected getlockfile err=%d\n",
2620 free((caddr_t)new_open, M_NFSDSTATE);
2621 free((caddr_t)new_deleg, M_NFSDSTATE);
2623 NFSLOCKV4ROOTMUTEX();
2624 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2625 NFSUNLOCKV4ROOTMUTEX();
2631 * Search for a conflicting open/share.
2633 if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
2635 * For Delegate_Cur, search for the matching Delegation,
2636 * which indicates no conflict.
2637 * An old delegation should have been recovered by the
2638 * client doing a Claim_DELEGATE_Prev, so I won't let
2639 * it match and return NFSERR_EXPIRED. Should I let it
2642 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
2643 if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
2644 (((nd->nd_flag & ND_NFSV41) != 0 &&
2645 stateidp->seqid == 0) ||
2646 stateidp->seqid == stp->ls_stateid.seqid) &&
2647 !NFSBCMP(stateidp->other, stp->ls_stateid.other,
2651 if (stp == LIST_END(&lfp->lf_deleg) ||
2652 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
2653 (stp->ls_flags & NFSLCK_DELEGREAD))) {
2655 printf("Nfsd openctrl unexpected expiry\n");
2656 free((caddr_t)new_open, M_NFSDSTATE);
2657 free((caddr_t)new_deleg, M_NFSDSTATE);
2659 NFSLOCKV4ROOTMUTEX();
2660 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2661 NFSUNLOCKV4ROOTMUTEX();
2663 error = NFSERR_EXPIRED;
2668 * Don't issue a Delegation, since one already exists and
2669 * delay delegation timeout, as required.
2672 nfsrv_delaydelegtimeout(stp);
2676 * Check for access/deny bit conflicts. I also check for the
2677 * same owner, since the client might not have bothered to check.
2678 * Also, note an open for the same file and owner, if found,
2679 * which is all we do here for Delegate_Cur, since conflict
2680 * checking is already done.
2682 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
2683 if (ownerstp && stp->ls_openowner == ownerstp)
2685 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) {
2687 * If another client has the file open, the only
2688 * delegation that can be issued is a Read delegation
2689 * and only if it is a Read open with Deny none.
2691 if (clp != stp->ls_clp) {
2692 if ((stp->ls_flags & NFSLCK_SHAREBITS) ==
2698 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
2699 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
2700 ((stp->ls_flags & NFSLCK_ACCESSBITS) &
2701 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){
2702 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
2705 * nfsrv_clientconflict() unlocks state
2706 * when it returns non-zero.
2708 free((caddr_t)new_open, M_NFSDSTATE);
2709 free((caddr_t)new_deleg, M_NFSDSTATE);
2714 error = NFSERR_PERM;
2715 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2716 error = NFSERR_RECLAIMCONFLICT;
2718 error = NFSERR_SHAREDENIED;
2722 NFSLOCKV4ROOTMUTEX();
2723 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2724 NFSUNLOCKV4ROOTMUTEX();
2726 free((caddr_t)new_open, M_NFSDSTATE);
2727 free((caddr_t)new_deleg, M_NFSDSTATE);
2728 printf("nfsd openctrl unexpected client cnfl\n");
2735 * Check for a conflicting delegation. If one is found, call
2736 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
2737 * been set yet, it will get the lock. Otherwise, it will recall
2738 * the delegation. Then, we try try again...
2739 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there
2740 * isn't a conflict.)
2741 * I currently believe the conflict algorithm to be:
2742 * For Open with Read Access and Deny None
2743 * - there is a conflict iff a different client has a write delegation
2744 * For Open with other Write Access or any Deny except None
2745 * - there is a conflict if a different client has any delegation
2746 * - there is a conflict if the same client has a read delegation
2747 * (The current consensus is that this last case should be
2748 * considered a conflict since the client with a read delegation
2749 * could have done an Open with ReadAccess and WriteDeny
2750 * locally and then not have checked for the WriteDeny.)
2752 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) {
2753 stp = LIST_FIRST(&lfp->lf_deleg);
2754 while (stp != LIST_END(&lfp->lf_deleg)) {
2755 nstp = LIST_NEXT(stp, ls_file);
2756 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD))
2760 if ((readonly && stp->ls_clp != clp &&
2761 (stp->ls_flags & NFSLCK_DELEGWRITE)) ||
2762 (!readonly && (stp->ls_clp != clp ||
2763 (stp->ls_flags & NFSLCK_DELEGREAD)))) {
2764 if (new_stp->ls_flags & NFSLCK_RECLAIM) {
2767 ret = nfsrv_delegconflict(stp, &haslock, p, vp);
2770 * nfsrv_delegconflict() unlocks state
2771 * when it returns non-zero.
2773 printf("Nfsd openctrl unexpected deleg cnfl\n");
2774 free((caddr_t)new_open, M_NFSDSTATE);
2775 free((caddr_t)new_deleg, M_NFSDSTATE);
2790 * We only get here if there was no open that conflicted.
2791 * If an open for the owner exists, or in the access/deny bits.
2792 * Otherwise it is a new open. If the open_owner hasn't been
2793 * confirmed, replace the open with the new one needing confirmation,
2794 * otherwise add the open.
2796 if (new_stp->ls_flags & NFSLCK_DELEGPREV) {
2798 * Handle NFSLCK_DELEGPREV by searching the old delegations for
2799 * a match. If found, just move the old delegation to the current
2800 * delegation list and issue open. If not found, return
2803 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
2804 if (stp->ls_lfp == lfp) {
2806 if (stp->ls_clp != clp)
2807 panic("olddeleg clp");
2808 LIST_REMOVE(stp, ls_list);
2809 LIST_REMOVE(stp, ls_hash);
2810 stp->ls_flags &= ~NFSLCK_OLDDELEG;
2811 stp->ls_stateid.seqid = delegstateidp->seqid = 1;
2812 stp->ls_stateid.other[0] = delegstateidp->other[0] =
2813 clp->lc_clientid.lval[0];
2814 stp->ls_stateid.other[1] = delegstateidp->other[1] =
2815 clp->lc_clientid.lval[1];
2816 stp->ls_stateid.other[2] = delegstateidp->other[2] =
2817 nfsrv_nextstateindex(clp);
2818 stp->ls_compref = nd->nd_compref;
2819 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list);
2820 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
2821 stp->ls_stateid), stp, ls_hash);
2822 if (stp->ls_flags & NFSLCK_DELEGWRITE)
2823 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
2825 *rflagsp |= NFSV4OPEN_READDELEGATE;
2826 clp->lc_delegtime = NFSD_MONOSEC +
2827 nfsrv_lease + NFSRV_LEASEDELTA;
2830 * Now, do the associated open.
2832 new_open->ls_stateid.seqid = 1;
2833 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
2834 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
2835 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
2836 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)|
2838 if (stp->ls_flags & NFSLCK_DELEGWRITE)
2839 new_open->ls_flags |= (NFSLCK_READACCESS |
2840 NFSLCK_WRITEACCESS);
2842 new_open->ls_flags |= NFSLCK_READACCESS;
2843 new_open->ls_uid = new_stp->ls_uid;
2844 new_open->ls_lfp = lfp;
2845 new_open->ls_clp = clp;
2846 LIST_INIT(&new_open->ls_open);
2847 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
2848 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
2851 * and handle the open owner
2854 new_open->ls_openowner = ownerstp;
2855 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list);
2857 new_open->ls_openowner = new_stp;
2858 new_stp->ls_flags = 0;
2859 nfsrvd_refcache(new_stp->ls_op);
2860 new_stp->ls_noopens = 0;
2861 LIST_INIT(&new_stp->ls_open);
2862 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
2863 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
2865 nfsstatsv1.srvopenowners++;
2866 nfsrv_openpluslock++;
2870 nfsstatsv1.srvopens++;
2871 nfsrv_openpluslock++;
2875 if (stp == LIST_END(&clp->lc_olddeleg))
2876 error = NFSERR_EXPIRED;
2877 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
2879 * Scan to see that no delegation for this client and file
2880 * doesn't already exist.
2881 * There also shouldn't yet be an Open for this file and
2884 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
2885 if (stp->ls_clp == clp)
2888 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) {
2890 * This is the Claim_Previous case with a delegation
2891 * type != Delegate_None.
2894 * First, add the delegation. (Although we must issue the
2895 * delegation, we can also ask for an immediate return.)
2897 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
2898 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] =
2899 clp->lc_clientid.lval[0];
2900 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] =
2901 clp->lc_clientid.lval[1];
2902 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] =
2903 nfsrv_nextstateindex(clp);
2904 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) {
2905 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
2906 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
2907 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
2909 new_deleg->ls_flags = (NFSLCK_DELEGREAD |
2911 *rflagsp |= NFSV4OPEN_READDELEGATE;
2913 new_deleg->ls_uid = new_stp->ls_uid;
2914 new_deleg->ls_lfp = lfp;
2915 new_deleg->ls_clp = clp;
2916 new_deleg->ls_filerev = filerev;
2917 new_deleg->ls_compref = nd->nd_compref;
2918 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
2919 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
2920 new_deleg->ls_stateid), new_deleg, ls_hash);
2921 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
2923 if (delegate == 2 || nfsrv_issuedelegs == 0 ||
2924 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
2926 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) ||
2927 !NFSVNO_DELEGOK(vp))
2928 *rflagsp |= NFSV4OPEN_RECALL;
2929 nfsstatsv1.srvdelegates++;
2930 nfsrv_openpluslock++;
2931 nfsrv_delegatecnt++;
2934 * Now, do the associated open.
2936 new_open->ls_stateid.seqid = 1;
2937 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
2938 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
2939 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
2940 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) |
2942 if (new_stp->ls_flags & NFSLCK_DELEGWRITE)
2943 new_open->ls_flags |= (NFSLCK_READACCESS |
2944 NFSLCK_WRITEACCESS);
2946 new_open->ls_flags |= NFSLCK_READACCESS;
2947 new_open->ls_uid = new_stp->ls_uid;
2948 new_open->ls_lfp = lfp;
2949 new_open->ls_clp = clp;
2950 LIST_INIT(&new_open->ls_open);
2951 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
2952 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
2955 * and handle the open owner
2958 new_open->ls_openowner = ownerstp;
2959 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
2961 new_open->ls_openowner = new_stp;
2962 new_stp->ls_flags = 0;
2963 nfsrvd_refcache(new_stp->ls_op);
2964 new_stp->ls_noopens = 0;
2965 LIST_INIT(&new_stp->ls_open);
2966 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
2967 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
2969 nfsstatsv1.srvopenowners++;
2970 nfsrv_openpluslock++;
2974 nfsstatsv1.srvopens++;
2975 nfsrv_openpluslock++;
2977 error = NFSERR_RECLAIMCONFLICT;
2979 } else if (ownerstp) {
2980 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) {
2981 /* Replace the open */
2982 if (ownerstp->ls_op)
2983 nfsrvd_derefcache(ownerstp->ls_op);
2984 ownerstp->ls_op = new_stp->ls_op;
2985 nfsrvd_refcache(ownerstp->ls_op);
2986 ownerstp->ls_seq = new_stp->ls_seq;
2987 *rflagsp |= NFSV4OPEN_RESULTCONFIRM;
2988 stp = LIST_FIRST(&ownerstp->ls_open);
2989 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
2991 stp->ls_stateid.seqid = 1;
2992 stp->ls_uid = new_stp->ls_uid;
2993 if (lfp != stp->ls_lfp) {
2994 LIST_REMOVE(stp, ls_file);
2995 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file);
2999 } else if (openstp) {
3000 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS);
3001 openstp->ls_stateid.seqid++;
3002 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3003 openstp->ls_stateid.seqid == 0)
3004 openstp->ls_stateid.seqid = 1;
3007 * This is where we can choose to issue a delegation.
3009 if (delegate == 0 || writedeleg == 0 ||
3010 NFSVNO_EXRDONLY(exp) || (readonly != 0 &&
3011 nfsrv_writedelegifpos == 0) ||
3012 !NFSVNO_DELEGOK(vp) ||
3013 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 ||
3014 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
3016 *rflagsp |= NFSV4OPEN_WDCONTENTION;
3017 else if (nfsrv_issuedelegs == 0 ||
3018 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
3019 *rflagsp |= NFSV4OPEN_WDRESOURCE;
3020 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
3021 *rflagsp |= NFSV4OPEN_WDNOTWANTED;
3023 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
3024 new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
3025 = clp->lc_clientid.lval[0];
3026 new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
3027 = clp->lc_clientid.lval[1];
3028 new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
3029 = nfsrv_nextstateindex(clp);
3030 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
3031 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
3032 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3033 new_deleg->ls_uid = new_stp->ls_uid;
3034 new_deleg->ls_lfp = lfp;
3035 new_deleg->ls_clp = clp;
3036 new_deleg->ls_filerev = filerev;
3037 new_deleg->ls_compref = nd->nd_compref;
3038 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
3039 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3040 new_deleg->ls_stateid), new_deleg, ls_hash);
3041 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
3043 nfsstatsv1.srvdelegates++;
3044 nfsrv_openpluslock++;
3045 nfsrv_delegatecnt++;
3048 new_open->ls_stateid.seqid = 1;
3049 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
3050 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
3051 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
3052 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)|
3054 new_open->ls_uid = new_stp->ls_uid;
3055 new_open->ls_openowner = ownerstp;
3056 new_open->ls_lfp = lfp;
3057 new_open->ls_clp = clp;
3058 LIST_INIT(&new_open->ls_open);
3059 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3060 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
3061 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3065 nfsstatsv1.srvopens++;
3066 nfsrv_openpluslock++;
3069 * This is where we can choose to issue a delegation.
3071 if (delegate == 0 || (writedeleg == 0 && readonly == 0) ||
3072 !NFSVNO_DELEGOK(vp) ||
3073 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
3075 *rflagsp |= NFSV4OPEN_WDCONTENTION;
3076 else if (nfsrv_issuedelegs == 0 ||
3077 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
3078 *rflagsp |= NFSV4OPEN_WDRESOURCE;
3079 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
3080 *rflagsp |= NFSV4OPEN_WDNOTWANTED;
3082 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
3083 new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
3084 = clp->lc_clientid.lval[0];
3085 new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
3086 = clp->lc_clientid.lval[1];
3087 new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
3088 = nfsrv_nextstateindex(clp);
3089 if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
3090 (nfsrv_writedelegifpos || !readonly) &&
3091 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) {
3092 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
3093 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
3094 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3096 new_deleg->ls_flags = (NFSLCK_DELEGREAD |
3098 *rflagsp |= NFSV4OPEN_READDELEGATE;
3100 new_deleg->ls_uid = new_stp->ls_uid;
3101 new_deleg->ls_lfp = lfp;
3102 new_deleg->ls_clp = clp;
3103 new_deleg->ls_filerev = filerev;
3104 new_deleg->ls_compref = nd->nd_compref;
3105 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
3106 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3107 new_deleg->ls_stateid), new_deleg, ls_hash);
3108 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
3110 nfsstatsv1.srvdelegates++;
3111 nfsrv_openpluslock++;
3112 nfsrv_delegatecnt++;
3117 * New owner case. Start the open_owner sequence with a
3118 * Needs confirmation (unless a reclaim) and hang the
3121 new_open->ls_stateid.seqid = 1;
3122 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
3123 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
3124 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
3125 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
3127 new_open->ls_uid = new_stp->ls_uid;
3128 LIST_INIT(&new_open->ls_open);
3129 new_open->ls_openowner = new_stp;
3130 new_open->ls_lfp = lfp;
3131 new_open->ls_clp = clp;
3132 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3133 if (new_stp->ls_flags & NFSLCK_RECLAIM) {
3134 new_stp->ls_flags = 0;
3135 } else if ((nd->nd_flag & ND_NFSV41) != 0) {
3136 /* NFSv4.1 never needs confirmation. */
3137 new_stp->ls_flags = 0;
3140 * This is where we can choose to issue a delegation.
3142 if (delegate && nfsrv_issuedelegs &&
3143 (writedeleg || readonly) &&
3144 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) ==
3146 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) &&
3147 NFSVNO_DELEGOK(vp) &&
3148 ((nd->nd_flag & ND_NFSV41) == 0 ||
3149 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) {
3150 new_deleg->ls_stateid.seqid =
3151 delegstateidp->seqid = 1;
3152 new_deleg->ls_stateid.other[0] =
3153 delegstateidp->other[0]
3154 = clp->lc_clientid.lval[0];
3155 new_deleg->ls_stateid.other[1] =
3156 delegstateidp->other[1]
3157 = clp->lc_clientid.lval[1];
3158 new_deleg->ls_stateid.other[2] =
3159 delegstateidp->other[2]
3160 = nfsrv_nextstateindex(clp);
3161 if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
3162 (nfsrv_writedelegifpos || !readonly) &&
3163 ((nd->nd_flag & ND_NFSV41) == 0 ||
3164 (new_stp->ls_flags & NFSLCK_WANTRDELEG) ==
3166 new_deleg->ls_flags =
3167 (NFSLCK_DELEGWRITE |
3169 NFSLCK_WRITEACCESS);
3170 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3172 new_deleg->ls_flags =
3175 *rflagsp |= NFSV4OPEN_READDELEGATE;
3177 new_deleg->ls_uid = new_stp->ls_uid;
3178 new_deleg->ls_lfp = lfp;
3179 new_deleg->ls_clp = clp;
3180 new_deleg->ls_filerev = filerev;
3181 new_deleg->ls_compref = nd->nd_compref;
3182 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg,
3184 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3185 new_deleg->ls_stateid), new_deleg, ls_hash);
3186 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg,
3189 nfsstatsv1.srvdelegates++;
3190 nfsrv_openpluslock++;
3191 nfsrv_delegatecnt++;
3194 * Since NFSv4.1 never does an OpenConfirm, the first
3195 * open state will be acquired here.
3197 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
3198 clp->lc_flags |= LCL_STAMPEDSTABLE;
3199 len = clp->lc_idlen;
3200 NFSBCOPY(clp->lc_id, clidp, len);
3204 *rflagsp |= NFSV4OPEN_RESULTCONFIRM;
3205 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM;
3207 nfsrvd_refcache(new_stp->ls_op);
3208 new_stp->ls_noopens = 0;
3209 LIST_INIT(&new_stp->ls_open);
3210 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
3211 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
3212 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3217 nfsstatsv1.srvopens++;
3218 nfsrv_openpluslock++;
3219 nfsstatsv1.srvopenowners++;
3220 nfsrv_openpluslock++;
3223 stateidp->seqid = openstp->ls_stateid.seqid;
3224 stateidp->other[0] = openstp->ls_stateid.other[0];
3225 stateidp->other[1] = openstp->ls_stateid.other[1];
3226 stateidp->other[2] = openstp->ls_stateid.other[2];
3230 NFSLOCKV4ROOTMUTEX();
3231 nfsv4_unlock(&nfsv4rootfs_lock, 1);
3232 NFSUNLOCKV4ROOTMUTEX();
3235 FREE((caddr_t)new_open, M_NFSDSTATE);
3237 FREE((caddr_t)new_deleg, M_NFSDSTATE);
3240 * If the NFSv4.1 client just acquired its first open, write a timestamp
3241 * to the stable storage file.
3243 if (gotstate != 0) {
3244 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
3245 nfsrv_backupstable();
3249 free(clidp, M_TEMP);
3250 NFSEXITCODE2(error, nd);
3255 * Open update. Does the confirm, downgrade and close.
3258 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid,
3259 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p)
3261 struct nfsstate *stp, *ownerstp;
3262 struct nfsclient *clp;
3263 struct nfslockfile *lfp;
3265 int error = 0, gotstate = 0, len = 0;
3266 u_char *clidp = NULL;
3269 * Check for restart conditions (client and server).
3271 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
3272 &new_stp->ls_stateid, 0);
3276 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
3279 * Get the open structure via clientid and stateid.
3281 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3282 (nfsquad_t)((u_quad_t)0), 0, nd, p);
3284 error = nfsrv_getstate(clp, &new_stp->ls_stateid,
3285 new_stp->ls_flags, &stp);
3288 * Sanity check the open.
3290 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) ||
3291 (!(new_stp->ls_flags & NFSLCK_CONFIRM) &&
3292 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) ||
3293 ((new_stp->ls_flags & NFSLCK_CONFIRM) &&
3294 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)))))
3295 error = NFSERR_BADSTATEID;
3298 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
3299 stp->ls_openowner, new_stp->ls_op);
3300 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid &&
3301 (((nd->nd_flag & ND_NFSV41) == 0 &&
3302 !(new_stp->ls_flags & NFSLCK_CONFIRM)) ||
3303 ((nd->nd_flag & ND_NFSV41) != 0 &&
3304 new_stp->ls_stateid.seqid != 0)))
3305 error = NFSERR_OLDSTATEID;
3306 if (!error && vnode_vtype(vp) != VREG) {
3307 if (vnode_vtype(vp) == VDIR)
3308 error = NFSERR_ISDIR;
3310 error = NFSERR_INVAL;
3315 * If a client tries to confirm an Open with a bad
3316 * seqid# and there are no byte range locks or other Opens
3317 * on the openowner, just throw it away, so the next use of the
3318 * openowner will start a fresh seq#.
3320 if (error == NFSERR_BADSEQID &&
3321 (new_stp->ls_flags & NFSLCK_CONFIRM) &&
3322 nfsrv_nootherstate(stp))
3323 nfsrv_freeopenowner(stp->ls_openowner, 0, p);
3329 * Set the return stateid.
3331 stateidp->seqid = stp->ls_stateid.seqid + 1;
3332 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
3333 stateidp->seqid = 1;
3334 stateidp->other[0] = stp->ls_stateid.other[0];
3335 stateidp->other[1] = stp->ls_stateid.other[1];
3336 stateidp->other[2] = stp->ls_stateid.other[2];
3338 * Now, handle the three cases.
3340 if (new_stp->ls_flags & NFSLCK_CONFIRM) {
3342 * If the open doesn't need confirmation, it seems to me that
3343 * there is a client error, but I'll just log it and keep going?
3345 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))
3346 printf("Nfsv4d: stray open confirm\n");
3347 stp->ls_openowner->ls_flags = 0;
3348 stp->ls_stateid.seqid++;
3349 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3350 stp->ls_stateid.seqid == 0)
3351 stp->ls_stateid.seqid = 1;
3352 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
3353 clp->lc_flags |= LCL_STAMPEDSTABLE;
3354 len = clp->lc_idlen;
3355 NFSBCOPY(clp->lc_id, clidp, len);
3359 } else if (new_stp->ls_flags & NFSLCK_CLOSE) {
3360 ownerstp = stp->ls_openowner;
3362 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) {
3363 /* Get the lf lock */
3366 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate");
3367 NFSVOPUNLOCK(vp, 0);
3368 if (nfsrv_freeopen(stp, vp, 1, p) == 0) {
3370 nfsrv_unlocklf(lfp);
3373 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3375 (void) nfsrv_freeopen(stp, NULL, 0, p);
3380 * Update the share bits, making sure that the new set are a
3381 * subset of the old ones.
3383 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS);
3384 if (~(stp->ls_flags) & bits) {
3386 error = NFSERR_INVAL;
3389 stp->ls_flags = (bits | NFSLCK_OPEN);
3390 stp->ls_stateid.seqid++;
3391 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3392 stp->ls_stateid.seqid == 0)
3393 stp->ls_stateid.seqid = 1;
3398 * If the client just confirmed its first open, write a timestamp
3399 * to the stable storage file.
3401 if (gotstate != 0) {
3402 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
3403 nfsrv_backupstable();
3407 free(clidp, M_TEMP);
3408 NFSEXITCODE2(error, nd);
3413 * Delegation update. Does the purge and return.
3416 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid,
3417 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred,
3420 struct nfsstate *stp;
3421 struct nfsclient *clp;
3426 * Do a sanity check against the file handle for DelegReturn.
3429 error = nfsvno_getfh(vp, &fh, p);
3434 * Check for restart conditions (client and server).
3436 if (op == NFSV4OP_DELEGRETURN)
3437 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN,
3440 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE,
3445 * Get the open structure via clientid and stateid.
3448 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3449 (nfsquad_t)((u_quad_t)0), 0, nd, p);
3451 if (error == NFSERR_CBPATHDOWN)
3453 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN)
3454 error = NFSERR_STALESTATEID;
3456 if (!error && op == NFSV4OP_DELEGRETURN) {
3457 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp);
3458 if (!error && stp->ls_stateid.seqid != stateidp->seqid &&
3459 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0))
3460 error = NFSERR_OLDSTATEID;
3463 * NFSERR_EXPIRED means that the state has gone away,
3464 * so Delegations have been purged. Just return ok.
3466 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) {
3476 if (op == NFSV4OP_DELEGRETURN) {
3477 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh,
3478 sizeof (fhandle_t))) {
3480 error = NFSERR_BADSTATEID;
3483 nfsrv_freedeleg(stp);
3485 nfsrv_freedeleglist(&clp->lc_olddeleg);
3496 * Release lock owner.
3499 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid,
3502 struct nfsstate *stp, *nstp, *openstp, *ownstp;
3503 struct nfsclient *clp;
3507 * Check for restart conditions (client and server).
3509 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
3510 &new_stp->ls_stateid, 0);
3516 * Get the lock owner by name.
3518 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3519 (nfsquad_t)((u_quad_t)0), 0, NULL, p);
3524 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) {
3525 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) {
3526 stp = LIST_FIRST(&openstp->ls_open);
3527 while (stp != LIST_END(&openstp->ls_open)) {
3528 nstp = LIST_NEXT(stp, ls_list);
3530 * If the owner matches, check for locks and
3531 * then free or return an error.
3533 if (stp->ls_ownerlen == new_stp->ls_ownerlen &&
3534 !NFSBCMP(stp->ls_owner, new_stp->ls_owner,
3536 if (LIST_EMPTY(&stp->ls_lock)) {
3537 nfsrv_freelockowner(stp, NULL, 0, p);
3540 error = NFSERR_LOCKSHELD;
3556 * Get the file handle for a lock structure.
3559 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp,
3560 fhandle_t *nfhp, NFSPROC_T *p)
3562 fhandle_t *fhp = NULL;
3566 * For lock, use the new nfslock structure, otherwise just
3567 * a fhandle_t on the stack.
3569 if (flags & NFSLCK_OPEN) {
3570 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL"));
3571 fhp = &new_lfp->lf_fh;
3575 panic("nfsrv_getlockfh");
3577 error = nfsvno_getfh(vp, fhp, p);
3583 * Get an nfs lock structure. Allocate one, as required, and return a
3585 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock.
3588 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
3589 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit)
3591 struct nfslockfile *lfp;
3592 fhandle_t *fhp = NULL, *tfhp;
3593 struct nfslockhashhead *hp;
3594 struct nfslockfile *new_lfp = NULL;
3597 * For lock, use the new nfslock structure, otherwise just
3598 * a fhandle_t on the stack.
3600 if (flags & NFSLCK_OPEN) {
3601 new_lfp = *new_lfpp;
3602 fhp = &new_lfp->lf_fh;
3606 panic("nfsrv_getlockfile");
3609 hp = NFSLOCKHASH(fhp);
3610 LIST_FOREACH(lfp, hp, lf_hash) {
3612 if (NFSVNO_CMPFH(fhp, tfhp)) {
3619 if (!(flags & NFSLCK_OPEN))
3623 * No match, so chain the new one into the list.
3625 LIST_INIT(&new_lfp->lf_open);
3626 LIST_INIT(&new_lfp->lf_lock);
3627 LIST_INIT(&new_lfp->lf_deleg);
3628 LIST_INIT(&new_lfp->lf_locallock);
3629 LIST_INIT(&new_lfp->lf_rollback);
3630 new_lfp->lf_locallock_lck.nfslock_usecnt = 0;
3631 new_lfp->lf_locallock_lck.nfslock_lock = 0;
3632 new_lfp->lf_usecount = 0;
3633 LIST_INSERT_HEAD(hp, new_lfp, lf_hash);
3640 * This function adds a nfslock lock structure to the list for the associated
3641 * nfsstate and nfslockfile structures. It will be inserted after the
3642 * entry pointed at by insert_lop.
3645 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop,
3646 struct nfsstate *stp, struct nfslockfile *lfp)
3648 struct nfslock *lop, *nlop;
3650 new_lop->lo_stp = stp;
3651 new_lop->lo_lfp = lfp;
3654 /* Insert in increasing lo_first order */
3655 lop = LIST_FIRST(&lfp->lf_lock);
3656 if (lop == LIST_END(&lfp->lf_lock) ||
3657 new_lop->lo_first <= lop->lo_first) {
3658 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile);
3660 nlop = LIST_NEXT(lop, lo_lckfile);
3661 while (nlop != LIST_END(&lfp->lf_lock) &&
3662 nlop->lo_first < new_lop->lo_first) {
3664 nlop = LIST_NEXT(lop, lo_lckfile);
3666 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile);
3669 new_lop->lo_lckfile.le_prev = NULL; /* list not used */
3673 * Insert after insert_lop, which is overloaded as stp or lfp for
3676 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp)
3677 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner);
3678 else if ((struct nfsstate *)insert_lop == stp)
3679 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner);
3681 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner);
3683 nfsstatsv1.srvlocks++;
3684 nfsrv_openpluslock++;
3689 * This function updates the locking for a lock owner and given file. It
3690 * maintains a list of lock ranges ordered on increasing file offset that
3691 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style).
3692 * It always adds new_lop to the list and sometimes uses the one pointed
3696 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
3697 struct nfslock **other_lopp, struct nfslockfile *lfp)
3699 struct nfslock *new_lop = *new_lopp;
3700 struct nfslock *lop, *tlop, *ilop;
3701 struct nfslock *other_lop = *other_lopp;
3702 int unlock = 0, myfile = 0;
3706 * Work down the list until the lock is merged.
3708 if (new_lop->lo_flags & NFSLCK_UNLOCK)
3711 ilop = (struct nfslock *)stp;
3712 lop = LIST_FIRST(&stp->ls_lock);
3714 ilop = (struct nfslock *)lfp;
3715 lop = LIST_FIRST(&lfp->lf_locallock);
3717 while (lop != NULL) {
3719 * Only check locks for this file that aren't before the start of
3722 if (lop->lo_lfp == lfp) {
3724 if (lop->lo_end >= new_lop->lo_first) {
3725 if (new_lop->lo_end < lop->lo_first) {
3727 * If the new lock ends before the start of the
3728 * current lock's range, no merge, just insert
3733 if (new_lop->lo_flags == lop->lo_flags ||
3734 (new_lop->lo_first <= lop->lo_first &&
3735 new_lop->lo_end >= lop->lo_end)) {
3737 * This lock can be absorbed by the new lock/unlock.
3738 * This happens when it covers the entire range
3739 * of the old lock or is contiguous
3740 * with the old lock and is of the same type or an
3743 if (lop->lo_first < new_lop->lo_first)
3744 new_lop->lo_first = lop->lo_first;
3745 if (lop->lo_end > new_lop->lo_end)
3746 new_lop->lo_end = lop->lo_end;
3748 lop = LIST_NEXT(lop, lo_lckowner);
3749 nfsrv_freenfslock(tlop);
3754 * All these cases are for contiguous locks that are not the
3755 * same type, so they can't be merged.
3757 if (new_lop->lo_first <= lop->lo_first) {
3759 * This case is where the new lock overlaps with the
3760 * first part of the old lock. Move the start of the
3761 * old lock to just past the end of the new lock. The
3762 * new lock will be inserted in front of the old, since
3763 * ilop hasn't been updated. (We are done now.)
3765 lop->lo_first = new_lop->lo_end;
3768 if (new_lop->lo_end >= lop->lo_end) {
3770 * This case is where the new lock overlaps with the
3771 * end of the old lock's range. Move the old lock's
3772 * end to just before the new lock's first and insert
3773 * the new lock after the old lock.
3774 * Might not be done yet, since the new lock could
3775 * overlap further locks with higher ranges.
3777 lop->lo_end = new_lop->lo_first;
3779 lop = LIST_NEXT(lop, lo_lckowner);
3783 * The final case is where the new lock's range is in the
3784 * middle of the current lock's and splits the current lock
3785 * up. Use *other_lopp to handle the second part of the
3786 * split old lock range. (We are done now.)
3787 * For unlock, we use new_lop as other_lop and tmp, since
3788 * other_lop and new_lop are the same for this case.
3789 * We noted the unlock case above, so we don't need
3790 * new_lop->lo_flags any longer.
3792 tmp = new_lop->lo_first;
3793 if (other_lop == NULL) {
3795 panic("nfsd srv update unlock");
3796 other_lop = new_lop;
3799 other_lop->lo_first = new_lop->lo_end;
3800 other_lop->lo_end = lop->lo_end;
3801 other_lop->lo_flags = lop->lo_flags;
3802 other_lop->lo_stp = stp;
3803 other_lop->lo_lfp = lfp;
3805 nfsrv_insertlock(other_lop, lop, stp, lfp);
3812 lop = LIST_NEXT(lop, lo_lckowner);
3813 if (myfile && (lop == NULL || lop->lo_lfp != lfp))
3818 * Insert the new lock in the list at the appropriate place.
3821 nfsrv_insertlock(new_lop, ilop, stp, lfp);
3827 * This function handles sequencing of locks, etc.
3828 * It returns an error that indicates what the caller should do.
3831 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
3832 struct nfsstate *stp, struct nfsrvcache *op)
3836 if ((nd->nd_flag & ND_NFSV41) != 0)
3837 /* NFSv4.1 ignores the open_seqid and lock_seqid. */
3839 if (op != nd->nd_rp)
3840 panic("nfsrvstate checkseqid");
3841 if (!(op->rc_flag & RC_INPROG))
3842 panic("nfsrvstate not inprog");
3843 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) {
3844 printf("refcnt=%d\n", stp->ls_op->rc_refcnt);
3845 panic("nfsrvstate op refcnt");
3847 if ((stp->ls_seq + 1) == seqid) {
3849 nfsrvd_derefcache(stp->ls_op);
3851 nfsrvd_refcache(op);
3852 stp->ls_seq = seqid;
3854 } else if (stp->ls_seq == seqid && stp->ls_op &&
3855 op->rc_xid == stp->ls_op->rc_xid &&
3856 op->rc_refcnt == 0 &&
3857 op->rc_reqlen == stp->ls_op->rc_reqlen &&
3858 op->rc_cksum == stp->ls_op->rc_cksum) {
3859 if (stp->ls_op->rc_flag & RC_INPROG) {
3860 error = NFSERR_DONTREPLY;
3863 nd->nd_rp = stp->ls_op;
3864 nd->nd_rp->rc_flag |= RC_INPROG;
3865 nfsrvd_delcache(op);
3866 error = NFSERR_REPLYFROMCACHE;
3869 error = NFSERR_BADSEQID;
3872 NFSEXITCODE2(error, nd);
3877 * Get the client ip address for callbacks. If the strings can't be parsed,
3878 * just set lc_program to 0 to indicate no callbacks are possible.
3879 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set
3880 * the address to the client's transport address. This won't be used
3881 * for callbacks, but can be printed out by nfsstats for info.)
3882 * Return error if the xdr can't be parsed, 0 otherwise.
3885 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp)
3890 struct sockaddr_in *rad, *sad;
3891 u_char protocol[5], addr[24];
3892 int error = 0, cantparse = 0;
3902 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *);
3903 rad->sin_family = AF_INET;
3904 rad->sin_len = sizeof (struct sockaddr_in);
3905 rad->sin_addr.s_addr = 0;
3907 clp->lc_req.nr_client = NULL;
3908 clp->lc_req.nr_lock = 0;
3909 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3910 i = fxdr_unsigned(int, *tl);
3911 if (i >= 3 && i <= 4) {
3912 error = nfsrv_mtostr(nd, protocol, i);
3915 if (!strcmp(protocol, "tcp")) {
3916 clp->lc_flags |= LCL_TCPCALLBACK;
3917 clp->lc_req.nr_sotype = SOCK_STREAM;
3918 clp->lc_req.nr_soproto = IPPROTO_TCP;
3919 } else if (!strcmp(protocol, "udp")) {
3920 clp->lc_req.nr_sotype = SOCK_DGRAM;
3921 clp->lc_req.nr_soproto = IPPROTO_UDP;
3928 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
3933 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3934 i = fxdr_unsigned(int, *tl);
3936 error = NFSERR_BADXDR;
3938 } else if (i == 0) {
3940 } else if (!cantparse && i <= 23 && i >= 11) {
3941 error = nfsrv_mtostr(nd, addr, i);
3946 * Parse out the address fields. We expect 6 decimal numbers
3947 * separated by '.'s.
3951 while (*cp && i < 6) {
3953 while (*cp2 && *cp2 != '.')
3961 j = nfsrv_getipnumber(cp);
3966 port.cval[5 - i] = j;
3975 if (ip.ival != 0x0) {
3976 rad->sin_addr.s_addr = htonl(ip.ival);
3977 rad->sin_port = htons(port.sval);
3985 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
3991 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
3992 rad->sin_addr.s_addr = sad->sin_addr.s_addr;
3993 rad->sin_port = 0x0;
3994 clp->lc_program = 0;
3997 NFSEXITCODE2(error, nd);
4002 * Turn a string of up to three decimal digits into a number. Return -1 upon
4006 nfsrv_getipnumber(u_char *cp)
4011 if (j > 2 || *cp < '0' || *cp > '9')
4024 * This function checks for restart conditions.
4027 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
4028 nfsv4stateid_t *stateidp, int specialid)
4033 * First check for a server restart. Open, LockT, ReleaseLockOwner
4034 * and DelegPurge have a clientid, the rest a stateid.
4037 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) {
4038 if (clientid.lval[0] != nfsrvboottime) {
4039 ret = NFSERR_STALECLIENTID;
4042 } else if (stateidp->other[0] != nfsrvboottime &&
4044 ret = NFSERR_STALESTATEID;
4049 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do
4050 * not use a lock/open owner seqid#, so the check can be done now.
4051 * (The others will be checked, as required, later.)
4053 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST)))
4057 ret = nfsrv_checkgrace(NULL, NULL, flags);
4069 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
4074 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) {
4075 if (flags & NFSLCK_RECLAIM) {
4076 error = NFSERR_NOGRACE;
4080 if (!(flags & NFSLCK_RECLAIM)) {
4081 error = NFSERR_GRACE;
4084 if (nd != NULL && clp != NULL &&
4085 (nd->nd_flag & ND_NFSV41) != 0 &&
4086 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) {
4087 error = NFSERR_NOGRACE;
4092 * If grace is almost over and we are still getting Reclaims,
4093 * extend grace a bit.
4095 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) >
4096 nfsrv_stablefirst.nsf_eograce)
4097 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC +
4107 * Do a server callback.
4110 nfsrv_docallback(struct nfsclient *clp, int procnum,
4111 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp,
4112 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p)
4116 struct nfsrv_descript nfsd, *nd = &nfsd;
4120 struct nfsdsession *sep = NULL;
4122 cred = newnfs_getcred();
4123 NFSLOCKSTATE(); /* mostly for lc_cbref++ */
4124 if (clp->lc_flags & LCL_NEEDSCONFIRM) {
4131 * Fill the callback program# and version into the request
4132 * structure for newnfs_connect() to use.
4134 clp->lc_req.nr_prog = clp->lc_program;
4136 if ((clp->lc_flags & LCL_NFSV41) != 0)
4137 clp->lc_req.nr_vers = NFSV41_CBVERS;
4140 clp->lc_req.nr_vers = NFSV4_CBVERS;
4143 * First, fill in some of the fields of nd and cr.
4145 nd->nd_flag = ND_NFSV4;
4146 if (clp->lc_flags & LCL_GSS)
4147 nd->nd_flag |= ND_KERBV;
4148 if ((clp->lc_flags & LCL_NFSV41) != 0)
4149 nd->nd_flag |= ND_NFSV41;
4151 cred->cr_uid = clp->lc_uid;
4152 cred->cr_gid = clp->lc_gid;
4153 callback = clp->lc_callback;
4155 cred->cr_ngroups = 1;
4158 * Get the first mbuf for the request.
4160 MGET(m, M_WAITOK, MT_DATA);
4162 nd->nd_mreq = nd->nd_mb = m;
4163 nd->nd_bpos = NFSMTOD(m, caddr_t);
4166 * and build the callback request.
4168 if (procnum == NFSV4OP_CBGETATTR) {
4169 nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
4170 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR,
4171 "CB Getattr", &sep);
4173 mbuf_freem(nd->nd_mreq);
4176 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
4177 (void)nfsrv_putattrbit(nd, attrbitp);
4178 } else if (procnum == NFSV4OP_CBRECALL) {
4179 nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
4180 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL,
4183 mbuf_freem(nd->nd_mreq);
4186 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
4187 *tl++ = txdr_unsigned(stateidp->seqid);
4188 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl,
4190 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
4195 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
4196 } else if (procnum == NFSV4PROC_CBNULL) {
4197 nd->nd_procnum = NFSV4PROC_CBNULL;
4198 if ((clp->lc_flags & LCL_NFSV41) != 0) {
4199 error = nfsv4_getcbsession(clp, &sep);
4201 mbuf_freem(nd->nd_mreq);
4206 error = NFSERR_SERVERFAULT;
4207 mbuf_freem(nd->nd_mreq);
4212 * Call newnfs_connect(), as required, and then newnfs_request().
4214 (void) newnfs_sndlock(&clp->lc_req.nr_lock);
4215 if (clp->lc_req.nr_client == NULL) {
4216 if ((clp->lc_flags & LCL_NFSV41) != 0)
4217 error = ECONNREFUSED;
4218 else if (nd->nd_procnum == NFSV4PROC_CBNULL)
4219 error = newnfs_connect(NULL, &clp->lc_req, cred,
4222 error = newnfs_connect(NULL, &clp->lc_req, cred,
4225 newnfs_sndunlock(&clp->lc_req.nr_lock);
4227 if ((nd->nd_flag & ND_NFSV41) != 0) {
4228 KASSERT(sep != NULL, ("sep NULL"));
4229 if (sep->sess_cbsess.nfsess_xprt != NULL)
4230 error = newnfs_request(nd, NULL, clp,
4231 &clp->lc_req, NULL, NULL, cred,
4232 clp->lc_program, clp->lc_req.nr_vers, NULL,
4233 1, NULL, &sep->sess_cbsess);
4236 * This should probably never occur, but if a
4237 * client somehow does an RPC without a
4238 * SequenceID Op that causes a callback just
4239 * after the nfsd threads have been terminated
4240 * and restared we could conceivably get here
4241 * without a backchannel xprt.
4243 printf("nfsrv_docallback: no xprt\n");
4244 error = ECONNREFUSED;
4246 nfsrv_freesession(sep, NULL);
4248 error = newnfs_request(nd, NULL, clp, &clp->lc_req,
4249 NULL, NULL, cred, clp->lc_program,
4250 clp->lc_req.nr_vers, NULL, 1, NULL, NULL);
4256 * If error is set here, the Callback path isn't working
4257 * properly, so twiddle the appropriate LCL_ flags.
4258 * (nd_repstat != 0 indicates the Callback path is working,
4259 * but the callback failed on the client.)
4263 * Mark the callback pathway down, which disabled issuing
4264 * of delegations and gets Renew to return NFSERR_CBPATHDOWN.
4267 clp->lc_flags |= LCL_CBDOWN;
4271 * Callback worked. If the callback path was down, disable
4272 * callbacks, so no more delegations will be issued. (This
4273 * is done on the assumption that the callback pathway is
4277 if (clp->lc_flags & LCL_CBDOWN)
4278 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON);
4281 error = nd->nd_repstat;
4282 else if (error == 0 && procnum == NFSV4OP_CBGETATTR)
4283 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
4284 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL,
4286 mbuf_freem(nd->nd_mrep);
4290 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) {
4291 clp->lc_flags &= ~LCL_WAKEUPWANTED;
4301 * Set up the compound RPC for the callback.
4304 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
4305 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp)
4310 len = strlen(optag);
4311 (void)nfsm_strtom(nd, optag, len);
4312 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED);
4313 if ((nd->nd_flag & ND_NFSV41) != 0) {
4314 *tl++ = txdr_unsigned(NFSV41_MINORVERSION);
4315 *tl++ = txdr_unsigned(callback);
4316 *tl++ = txdr_unsigned(2);
4317 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE);
4318 error = nfsv4_setcbsequence(nd, clp, 1, sepp);
4321 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
4322 *tl = txdr_unsigned(op);
4324 *tl++ = txdr_unsigned(NFSV4_MINORVERSION);
4325 *tl++ = txdr_unsigned(callback);
4326 *tl++ = txdr_unsigned(1);
4327 *tl = txdr_unsigned(op);
4333 * Return the next index# for a clientid. Mostly just increment and return
4334 * the next one, but... if the 32bit unsigned does actually wrap around,
4335 * it should be rebooted.
4336 * At an average rate of one new client per second, it will wrap around in
4337 * approximately 136 years. (I think the server will have been shut
4338 * down or rebooted before then.)
4341 nfsrv_nextclientindex(void)
4343 static u_int32_t client_index = 0;
4346 if (client_index != 0)
4347 return (client_index);
4349 printf("%s: out of clientids\n", __func__);
4350 return (client_index);
4354 * Return the next index# for a stateid. Mostly just increment and return
4355 * the next one, but... if the 32bit unsigned does actually wrap around
4356 * (will a BSD server stay up that long?), find
4357 * new start and end values.
4360 nfsrv_nextstateindex(struct nfsclient *clp)
4362 struct nfsstate *stp;
4364 u_int32_t canuse, min_index, max_index;
4366 if (!(clp->lc_flags & LCL_INDEXNOTOK)) {
4367 clp->lc_stateindex++;
4368 if (clp->lc_stateindex != clp->lc_statemaxindex)
4369 return (clp->lc_stateindex);
4373 * Yuck, we've hit the end.
4374 * Look for a new min and max.
4377 max_index = 0xffffffff;
4378 for (i = 0; i < nfsrv_statehashsize; i++) {
4379 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
4380 if (stp->ls_stateid.other[2] > 0x80000000) {
4381 if (stp->ls_stateid.other[2] < max_index)
4382 max_index = stp->ls_stateid.other[2];
4384 if (stp->ls_stateid.other[2] > min_index)
4385 min_index = stp->ls_stateid.other[2];
4391 * Yikes, highly unlikely, but I'll handle it anyhow.
4393 if (min_index == 0x80000000 && max_index == 0x80000001) {
4396 * Loop around until we find an unused entry. Return that
4397 * and set LCL_INDEXNOTOK, so the search will continue next time.
4398 * (This is one of those rare cases where a goto is the
4399 * cleanest way to code the loop.)
4402 for (i = 0; i < nfsrv_statehashsize; i++) {
4403 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
4404 if (stp->ls_stateid.other[2] == canuse) {
4410 clp->lc_flags |= LCL_INDEXNOTOK;
4415 * Ok to start again from min + 1.
4417 clp->lc_stateindex = min_index + 1;
4418 clp->lc_statemaxindex = max_index;
4419 clp->lc_flags &= ~LCL_INDEXNOTOK;
4420 return (clp->lc_stateindex);
4424 * The following functions handle the stable storage file that deals with
4425 * the edge conditions described in RFC3530 Sec. 8.6.3.
4426 * The file is as follows:
4427 * - a single record at the beginning that has the lease time of the
4428 * previous server instance (before the last reboot) and the nfsrvboottime
4429 * values for the previous server boots.
4430 * These previous boot times are used to ensure that the current
4431 * nfsrvboottime does not, somehow, get set to a previous one.
4432 * (This is important so that Stale ClientIDs and StateIDs can
4434 * The number of previous nfsvrboottime values precedes the list.
4435 * - followed by some number of appended records with:
4436 * - client id string
4437 * - flag that indicates it is a record revoking state via lease
4438 * expiration or similar
4439 * OR has successfully acquired state.
4440 * These structures vary in length, with the client string at the end, up
4441 * to NFSV4_OPAQUELIMIT in size.
4443 * At the end of the grace period, the file is truncated, the first
4444 * record is rewritten with updated information and any acquired state
4445 * records for successful reclaims of state are written.
4447 * Subsequent records are appended when the first state is issued to
4448 * a client and when state is revoked for a client.
4450 * When reading the file in, state issued records that come later in
4451 * the file override older ones, since the append log is in cronological order.
4452 * If, for some reason, the file can't be read, the grace period is
4453 * immediately terminated and all reclaims get NFSERR_NOGRACE.
4457 * Read in the stable storage file. Called by nfssvc() before the nfsd
4458 * processes start servicing requests.
4461 nfsrv_setupstable(NFSPROC_T *p)
4463 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
4464 struct nfsrv_stable *sp, *nsp;
4465 struct nfst_rec *tsp;
4466 int error, i, tryagain;
4468 ssize_t aresid, len;
4471 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without
4472 * a reboot, so state has not been lost.
4474 if (sf->nsf_flags & NFSNSF_UPDATEDONE)
4477 * Set Grace over just until the file reads successfully.
4479 nfsrvboottime = time_second;
4480 LIST_INIT(&sf->nsf_head);
4481 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
4482 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA;
4483 if (sf->nsf_fp == NULL)
4485 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4486 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE,
4487 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4488 if (error || aresid || sf->nsf_numboots == 0 ||
4489 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS)
4493 * Now, read in the boottimes.
4495 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) *
4496 sizeof (time_t), M_TEMP, M_WAITOK);
4497 off = sizeof (struct nfsf_rec);
4498 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4499 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off,
4500 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4501 if (error || aresid) {
4502 free((caddr_t)sf->nsf_bootvals, M_TEMP);
4503 sf->nsf_bootvals = NULL;
4508 * Make sure this nfsrvboottime is different from all recorded
4513 for (i = 0; i < sf->nsf_numboots; i++) {
4514 if (nfsrvboottime == sf->nsf_bootvals[i]) {
4522 sf->nsf_flags |= NFSNSF_OK;
4523 off += (sf->nsf_numboots * sizeof (time_t));
4526 * Read through the file, building a list of records for grace
4528 * Each record is between sizeof (struct nfst_rec) and
4529 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1
4530 * and is actually sizeof (struct nfst_rec) + nst_len - 1.
4532 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
4533 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK);
4535 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4536 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1,
4537 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4538 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid;
4539 if (error || (len > 0 && (len < sizeof (struct nfst_rec) ||
4540 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) {
4542 * Yuck, the file has been corrupted, so just return
4543 * after clearing out any restart state, so the grace period
4546 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
4547 LIST_REMOVE(sp, nst_list);
4548 free((caddr_t)sp, M_TEMP);
4550 free((caddr_t)tsp, M_TEMP);
4551 sf->nsf_flags &= ~NFSNSF_OK;
4552 free((caddr_t)sf->nsf_bootvals, M_TEMP);
4553 sf->nsf_bootvals = NULL;
4557 off += sizeof (struct nfst_rec) + tsp->len - 1;
4559 * Search the list for a matching client.
4561 LIST_FOREACH(sp, &sf->nsf_head, nst_list) {
4562 if (tsp->len == sp->nst_len &&
4563 !NFSBCMP(tsp->client, sp->nst_client, tsp->len))
4566 if (sp == LIST_END(&sf->nsf_head)) {
4567 sp = (struct nfsrv_stable *)malloc(tsp->len +
4568 sizeof (struct nfsrv_stable) - 1, M_TEMP,
4570 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec,
4571 sizeof (struct nfst_rec) + tsp->len - 1);
4572 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list);
4574 if (tsp->flag == NFSNST_REVOKE)
4575 sp->nst_flag |= NFSNST_REVOKE;
4578 * A subsequent timestamp indicates the client
4579 * did a setclientid/confirm and any previous
4580 * revoke is no longer relevant.
4582 sp->nst_flag &= ~NFSNST_REVOKE;
4586 free((caddr_t)tsp, M_TEMP);
4587 sf->nsf_flags = NFSNSF_OK;
4588 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease +
4593 * Update the stable storage file, now that the grace period is over.
4596 nfsrv_updatestable(NFSPROC_T *p)
4598 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
4599 struct nfsrv_stable *sp, *nsp;
4601 struct nfsvattr nva;
4603 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000)
4608 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE))
4610 sf->nsf_flags |= NFSNSF_UPDATEDONE;
4612 * Ok, we need to rewrite the stable storage file.
4613 * - truncate to 0 length
4614 * - write the new first structure
4615 * - loop through the data structures, writing out any that
4616 * have timestamps older than the old boot
4618 if (sf->nsf_bootvals) {
4620 for (i = sf->nsf_numboots - 2; i >= 0; i--)
4621 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i];
4623 sf->nsf_numboots = 1;
4624 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t),
4627 sf->nsf_bootvals[0] = nfsrvboottime;
4628 sf->nsf_lease = nfsrv_lease;
4629 NFSVNO_ATTRINIT(&nva);
4630 NFSVNO_SETATTRVAL(&nva, size, 0);
4631 vp = NFSFPVNODE(sf->nsf_fp);
4632 vn_start_write(vp, &mp, V_WAIT);
4633 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
4634 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p,
4636 NFSVOPUNLOCK(vp, 0);
4639 vn_finished_write(mp);
4641 error = NFSD_RDWR(UIO_WRITE, vp,
4642 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0,
4643 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
4645 error = NFSD_RDWR(UIO_WRITE, vp,
4646 (caddr_t)sf->nsf_bootvals,
4647 sf->nsf_numboots * sizeof (time_t),
4648 (off_t)(sizeof (struct nfsf_rec)),
4649 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
4650 free((caddr_t)sf->nsf_bootvals, M_TEMP);
4651 sf->nsf_bootvals = NULL;
4653 sf->nsf_flags &= ~NFSNSF_OK;
4654 printf("EEK! Can't write NfsV4 stable storage file\n");
4657 sf->nsf_flags |= NFSNSF_OK;
4660 * Loop through the list and write out timestamp records for
4661 * any clients that successfully reclaimed state.
4663 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
4664 if (sp->nst_flag & NFSNST_GOTSTATE) {
4665 nfsrv_writestable(sp->nst_client, sp->nst_len,
4666 NFSNST_NEWSTATE, p);
4667 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE;
4669 LIST_REMOVE(sp, nst_list);
4670 free((caddr_t)sp, M_TEMP);
4672 nfsrv_backupstable();
4676 * Append a record to the stable storage file.
4679 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p)
4681 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
4682 struct nfst_rec *sp;
4685 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL)
4687 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
4688 len - 1, M_TEMP, M_WAITOK);
4690 NFSBCOPY(client, sp->client, len);
4692 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp),
4693 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0,
4694 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p);
4695 free((caddr_t)sp, M_TEMP);
4697 sf->nsf_flags &= ~NFSNSF_OK;
4698 printf("EEK! Can't write NfsV4 stable storage file\n");
4703 * This function is called during the grace period to mark a client
4704 * that successfully reclaimed state.
4707 nfsrv_markstable(struct nfsclient *clp)
4709 struct nfsrv_stable *sp;
4712 * First find the client structure.
4714 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
4715 if (sp->nst_len == clp->lc_idlen &&
4716 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
4719 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head))
4723 * Now, just mark it and set the nfsclient back pointer.
4725 sp->nst_flag |= NFSNST_GOTSTATE;
4730 * This function is called for a reclaim, to see if it gets grace.
4731 * It returns 0 if a reclaim is allowed, 1 otherwise.
4734 nfsrv_checkstable(struct nfsclient *clp)
4736 struct nfsrv_stable *sp;
4739 * First, find the entry for the client.
4741 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
4742 if (sp->nst_len == clp->lc_idlen &&
4743 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
4748 * If not in the list, state was revoked or no state was issued
4749 * since the previous reboot, a reclaim is denied.
4751 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) ||
4752 (sp->nst_flag & NFSNST_REVOKE) ||
4753 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK))
4759 * Test for and try to clear out a conflicting client. This is called by
4760 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients
4762 * The trick here is that it can't revoke a conflicting client with an
4763 * expired lease unless it holds the v4root lock, so...
4764 * If no v4root lock, get the lock and return 1 to indicate "try again".
4765 * Return 0 to indicate the conflict can't be revoked and 1 to indicate
4766 * the revocation worked and the conflicting client is "bye, bye", so it
4767 * can be tried again.
4768 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK().
4769 * Unlocks State before a non-zero value is returned.
4772 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp,
4775 int gotlock, lktype = 0;
4778 * If lease hasn't expired, we can't fix it.
4780 if (clp->lc_expiry >= NFSD_MONOSEC ||
4781 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE))
4783 if (*haslockp == 0) {
4786 lktype = NFSVOPISLOCKED(vp);
4787 NFSVOPUNLOCK(vp, 0);
4789 NFSLOCKV4ROOTMUTEX();
4790 nfsv4_relref(&nfsv4rootfs_lock);
4792 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
4793 NFSV4ROOTLOCKMUTEXPTR, NULL);
4795 NFSUNLOCKV4ROOTMUTEX();
4798 NFSVOPLOCK(vp, lktype | LK_RETRY);
4799 if ((vp->v_iflag & VI_DOOMED) != 0)
4807 * Ok, we can expire the conflicting client.
4809 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
4810 nfsrv_backupstable();
4811 nfsrv_cleanclient(clp, p);
4812 nfsrv_freedeleglist(&clp->lc_deleg);
4813 nfsrv_freedeleglist(&clp->lc_olddeleg);
4814 LIST_REMOVE(clp, lc_hash);
4815 nfsrv_zapclient(clp, p);
4820 * Resolve a delegation conflict.
4821 * Returns 0 to indicate the conflict was resolved without sleeping.
4822 * Return -1 to indicate that the caller should check for conflicts again.
4823 * Return > 0 for an error that should be returned, normally NFSERR_DELAY.
4825 * Also, manipulate the nfsv4root_lock, as required. It isn't changed
4826 * for a return of 0, since there was no sleep and it could be required
4827 * later. It is released for a return of NFSERR_DELAY, since the caller
4828 * will return that error. It is released when a sleep was done waiting
4829 * for the delegation to be returned or expire (so that other nfsds can
4830 * handle ops). Then, it must be acquired for the write to stable storage.
4831 * (This function is somewhat similar to nfsrv_clientconflict(), but
4832 * the semantics differ in a couple of subtle ways. The return of 0
4833 * indicates the conflict was resolved without sleeping here, not
4834 * that the conflict can't be resolved and the handling of nfsv4root_lock
4835 * differs, as noted above.)
4836 * Unlocks State before returning a non-zero value.
4839 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p,
4842 struct nfsclient *clp = stp->ls_clp;
4843 int gotlock, error, lktype = 0, retrycnt, zapped_clp;
4844 nfsv4stateid_t tstateid;
4848 * If the conflict is with an old delegation...
4850 if (stp->ls_flags & NFSLCK_OLDDELEG) {
4852 * You can delete it, if it has expired.
4854 if (clp->lc_delegtime < NFSD_MONOSEC) {
4855 nfsrv_freedeleg(stp);
4862 * During this delay, the old delegation could expire or it
4863 * could be recovered by the client via an Open with
4864 * CLAIM_DELEGATE_PREV.
4865 * Release the nfsv4root_lock, if held.
4869 NFSLOCKV4ROOTMUTEX();
4870 nfsv4_unlock(&nfsv4rootfs_lock, 1);
4871 NFSUNLOCKV4ROOTMUTEX();
4873 error = NFSERR_DELAY;
4878 * It's a current delegation, so:
4879 * - check to see if the delegation has expired
4880 * - if so, get the v4root lock and then expire it
4882 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) {
4884 * - do a recall callback, since not yet done
4885 * For now, never allow truncate to be set. To use
4886 * truncate safely, it must be guaranteed that the
4887 * Remove, Rename or Setattr with size of 0 will
4888 * succeed and that would require major changes to
4889 * the VFS/Vnode OPs.
4890 * Set the expiry time large enough so that it won't expire
4891 * until after the callback, then set it correctly, once
4892 * the callback is done. (The delegation will now time
4893 * out whether or not the Recall worked ok. The timeout
4894 * will be extended when ops are done on the delegation
4895 * stateid, up to the timelimit.)
4897 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) +
4899 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) +
4901 stp->ls_flags |= NFSLCK_DELEGRECALL;
4904 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies
4905 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done
4906 * in order to try and avoid a race that could happen
4907 * when a CBRecall request passed the Open reply with
4908 * the delegation in it when transitting the network.
4909 * Since nfsrv_docallback will sleep, don't use stp after
4912 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid,
4914 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh,
4919 NFSLOCKV4ROOTMUTEX();
4920 nfsv4_unlock(&nfsv4rootfs_lock, 1);
4921 NFSUNLOCKV4ROOTMUTEX();
4925 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL,
4926 &tstateid, 0, &tfh, NULL, NULL, p);
4928 } while ((error == NFSERR_BADSTATEID ||
4929 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT);
4930 error = NFSERR_DELAY;
4934 if (clp->lc_expiry >= NFSD_MONOSEC &&
4935 stp->ls_delegtime >= NFSD_MONOSEC) {
4938 * A recall has been done, but it has not yet expired.
4943 NFSLOCKV4ROOTMUTEX();
4944 nfsv4_unlock(&nfsv4rootfs_lock, 1);
4945 NFSUNLOCKV4ROOTMUTEX();
4947 error = NFSERR_DELAY;
4952 * If we don't yet have the lock, just get it and then return,
4953 * since we need that before deleting expired state, such as
4955 * When getting the lock, unlock the vnode, so other nfsds that
4956 * are in progress, won't get stuck waiting for the vnode lock.
4958 if (*haslockp == 0) {
4961 lktype = NFSVOPISLOCKED(vp);
4962 NFSVOPUNLOCK(vp, 0);
4964 NFSLOCKV4ROOTMUTEX();
4965 nfsv4_relref(&nfsv4rootfs_lock);
4967 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
4968 NFSV4ROOTLOCKMUTEXPTR, NULL);
4970 NFSUNLOCKV4ROOTMUTEX();
4973 NFSVOPLOCK(vp, lktype | LK_RETRY);
4974 if ((vp->v_iflag & VI_DOOMED) != 0) {
4976 NFSLOCKV4ROOTMUTEX();
4977 nfsv4_unlock(&nfsv4rootfs_lock, 1);
4978 NFSUNLOCKV4ROOTMUTEX();
4979 error = NFSERR_PERM;
4989 * Ok, we can delete the expired delegation.
4990 * First, write the Revoke record to stable storage and then
4991 * clear out the conflict.
4992 * Since all other nfsd threads are now blocked, we can safely
4993 * sleep without the state changing.
4995 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
4996 nfsrv_backupstable();
4997 if (clp->lc_expiry < NFSD_MONOSEC) {
4998 nfsrv_cleanclient(clp, p);
4999 nfsrv_freedeleglist(&clp->lc_deleg);
5000 nfsrv_freedeleglist(&clp->lc_olddeleg);
5001 LIST_REMOVE(clp, lc_hash);
5004 nfsrv_freedeleg(stp);
5008 nfsrv_zapclient(clp, p);
5017 * Check for a remove allowed, if remove is set to 1 and get rid of
5021 nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p)
5023 struct nfsstate *stp;
5024 struct nfslockfile *lfp;
5025 int error, haslock = 0;
5029 * First, get the lock file structure.
5030 * (A return of -1 means no associated state, so remove ok.)
5032 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
5036 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
5040 NFSLOCKV4ROOTMUTEX();
5041 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5042 NFSUNLOCKV4ROOTMUTEX();
5050 * Now, we must Recall any delegations.
5052 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p);
5055 * nfsrv_cleandeleg() unlocks state for non-zero
5061 NFSLOCKV4ROOTMUTEX();
5062 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5063 NFSUNLOCKV4ROOTMUTEX();
5069 * Now, look for a conflicting open share.
5073 * If the entry in the directory was the last reference to the
5074 * corresponding filesystem object, the object can be destroyed
5076 if(lfp->lf_usecount>1)
5077 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
5078 if (stp->ls_flags & NFSLCK_WRITEDENY) {
5079 error = NFSERR_FILEOPEN;
5087 NFSLOCKV4ROOTMUTEX();
5088 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5089 NFSUNLOCKV4ROOTMUTEX();
5098 * Clear out all delegations for the file referred to by lfp.
5099 * May return NFSERR_DELAY, if there will be a delay waiting for
5100 * delegations to expire.
5101 * Returns -1 to indicate it slept while recalling a delegation.
5102 * This function has the side effect of deleting the nfslockfile structure,
5103 * if it no longer has associated state and didn't have to sleep.
5104 * Unlocks State before a non-zero value is returned.
5107 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
5108 struct nfsclient *clp, int *haslockp, NFSPROC_T *p)
5110 struct nfsstate *stp, *nstp;
5113 stp = LIST_FIRST(&lfp->lf_deleg);
5114 while (stp != LIST_END(&lfp->lf_deleg)) {
5115 nstp = LIST_NEXT(stp, ls_file);
5116 if (stp->ls_clp != clp) {
5117 ret = nfsrv_delegconflict(stp, haslockp, p, vp);
5120 * nfsrv_delegconflict() unlocks state
5121 * when it returns non-zero.
5134 * There are certain operations that, when being done outside of NFSv4,
5135 * require that any NFSv4 delegation for the file be recalled.
5136 * This function is to be called for those cases:
5137 * VOP_RENAME() - When a delegation is being recalled for any reason,
5138 * the client may have to do Opens against the server, using the file's
5139 * final component name. If the file has been renamed on the server,
5140 * that component name will be incorrect and the Open will fail.
5141 * VOP_REMOVE() - Theoretically, a client could Open a file after it has
5142 * been removed on the server, if there is a delegation issued to
5143 * that client for the file. I say "theoretically" since clients
5144 * normally do an Access Op before the Open and that Access Op will
5145 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so
5146 * they will detect the file's removal in the same manner. (There is
5147 * one case where RFC3530 allows a client to do an Open without first
5148 * doing an Access Op, which is passage of a check against the ACE
5149 * returned with a Write delegation, but current practice is to ignore
5150 * the ACE and always do an Access Op.)
5151 * Since the functions can only be called with an unlocked vnode, this
5152 * can't be done at this time.
5153 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range
5154 * locks locally in the client, which are not visible to the server. To
5155 * deal with this, issuing of delegations for a vnode must be disabled
5156 * and all delegations for the vnode recalled. This is done via the
5157 * second function, using the VV_DISABLEDELEG vflag on the vnode.
5160 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
5166 * First, check to see if the server is currently running and it has
5167 * been called for a regular file when issuing delegations.
5169 if (newnfs_numnfsd == 0 || vp->v_type != VREG ||
5170 nfsrv_issuedelegs == 0)
5173 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp));
5175 * First, get a reference on the nfsv4rootfs_lock so that an
5176 * exclusive lock cannot be acquired by another thread.
5178 NFSLOCKV4ROOTMUTEX();
5179 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
5180 NFSUNLOCKV4ROOTMUTEX();
5183 * Now, call nfsrv_checkremove() in a loop while it returns
5184 * NFSERR_DELAY. Return upon any other error or when timed out.
5186 starttime = NFSD_MONOSEC;
5188 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
5189 error = nfsrv_checkremove(vp, 0, p);
5190 NFSVOPUNLOCK(vp, 0);
5193 if (error == NFSERR_DELAY) {
5194 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO)
5196 /* Sleep for a short period of time */
5197 (void) nfs_catnap(PZERO, 0, "nfsremove");
5199 } while (error == NFSERR_DELAY);
5200 NFSLOCKV4ROOTMUTEX();
5201 nfsv4_relref(&nfsv4rootfs_lock);
5202 NFSUNLOCKV4ROOTMUTEX();
5206 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p)
5209 #ifdef VV_DISABLEDELEG
5211 * First, flag issuance of delegations disabled.
5213 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG);
5217 * Then call nfsd_recalldelegation() to get rid of all extant
5220 nfsd_recalldelegation(vp, p);
5224 * Check for conflicting locks, etc. and then get rid of delegations.
5225 * (At one point I thought that I should get rid of delegations for any
5226 * Setattr, since it could potentially disallow the I/O op (read or write)
5227 * allowed by the delegation. However, Setattr Ops that aren't changing
5228 * the size get a stateid of all 0s, so you can't tell if it is a delegation
5229 * for the same client or a different one, so I decided to only get rid
5230 * of delegations for other clients when the size is being changed.)
5231 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such
5232 * as Write backs, even if there is no delegation, so it really isn't any
5236 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd,
5237 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp,
5238 struct nfsexstuff *exp, NFSPROC_T *p)
5240 struct nfsstate st, *stp = &st;
5241 struct nfslock lo, *lop = &lo;
5245 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) {
5246 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
5247 lop->lo_first = nvap->na_size;
5252 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) ||
5253 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) ||
5254 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) ||
5255 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL))
5256 stp->ls_flags |= NFSLCK_SETATTR;
5257 if (stp->ls_flags == 0)
5259 lop->lo_end = NFS64BITSSET;
5260 lop->lo_flags = NFSLCK_WRITE;
5261 stp->ls_ownerlen = 0;
5263 stp->ls_uid = nd->nd_cred->cr_uid;
5264 stp->ls_stateid.seqid = stateidp->seqid;
5265 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0];
5266 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1];
5267 stp->ls_stateid.other[2] = stateidp->other[2];
5268 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
5269 stateidp, exp, nd, p);
5272 NFSEXITCODE2(error, nd);
5277 * Check for a write delegation and do a CBGETATTR if there is one, updating
5278 * the attributes, as required.
5279 * Should I return an error if I can't get the attributes? (For now, I'll
5283 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp,
5284 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred,
5287 struct nfsstate *stp;
5288 struct nfslockfile *lfp;
5289 struct nfsclient *clp;
5290 struct nfsvattr nva;
5293 nfsattrbit_t cbbits;
5294 u_quad_t delegfilerev;
5296 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits);
5297 if (!NFSNONZERO_ATTRBIT(&cbbits))
5301 * Get the lock file structure.
5302 * (A return of -1 means no associated state, so return ok.)
5304 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
5307 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
5316 * Now, look for a write delegation.
5318 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
5319 if (stp->ls_flags & NFSLCK_DELEGWRITE)
5322 if (stp == LIST_END(&lfp->lf_deleg)) {
5327 delegfilerev = stp->ls_filerev;
5330 * If the Write delegation was issued as a part of this Compound RPC
5331 * or if we have an Implied Clientid (used in a previous Op in this
5332 * compound) and it is the client the delegation was issued to,
5334 * I also assume that it is from the same client iff the network
5335 * host IP address is the same as the callback address. (Not
5336 * exactly correct by the RFC, but avoids a lot of Getattr
5339 if (nd->nd_compref == stp->ls_compref ||
5340 ((nd->nd_flag & ND_IMPLIEDCLID) &&
5341 clp->lc_clientid.qval == nd->nd_clientid.qval) ||
5342 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) {
5348 * We are now done with the delegation state structure,
5349 * so the statelock can be released and we can now tsleep().
5353 * Now, we must do the CB Getattr callback, to see if Change or Size
5356 if (clp->lc_expiry >= NFSD_MONOSEC) {
5358 NFSVNO_ATTRINIT(&nva);
5359 nva.na_filerev = NFS64BITSSET;
5360 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL,
5361 0, &nfh, &nva, &cbbits, p);
5363 if ((nva.na_filerev != NFS64BITSSET &&
5364 nva.na_filerev > delegfilerev) ||
5365 (NFSVNO_ISSETSIZE(&nva) &&
5366 nva.na_size != nvap->na_size)) {
5367 error = nfsvno_updfilerev(vp, nvap, cred, p);
5368 if (NFSVNO_ISSETSIZE(&nva))
5369 nvap->na_size = nva.na_size;
5372 error = 0; /* Ignore callback errors for now. */
5378 NFSEXITCODE2(error, nd);
5383 * This function looks for openowners that haven't had any opens for
5384 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS
5388 nfsrv_throwawayopens(NFSPROC_T *p)
5390 struct nfsclient *clp, *nclp;
5391 struct nfsstate *stp, *nstp;
5395 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS;
5397 * For each client...
5399 for (i = 0; i < nfsrv_clienthashsize; i++) {
5400 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) {
5401 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) {
5402 if (LIST_EMPTY(&stp->ls_open) &&
5403 (stp->ls_noopens > NFSNOOPEN ||
5404 (nfsrv_openpluslock * 2) >
5405 nfsrv_v4statelimit))
5406 nfsrv_freeopenowner(stp, 0, p);
5414 * This function checks to see if the credentials are the same.
5415 * Returns 1 for not same, 0 otherwise.
5418 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp)
5421 if (nd->nd_flag & ND_GSS) {
5422 if (!(clp->lc_flags & LCL_GSS))
5424 if (clp->lc_flags & LCL_NAME) {
5425 if (nd->nd_princlen != clp->lc_namelen ||
5426 NFSBCMP(nd->nd_principal, clp->lc_name,
5432 if (nd->nd_cred->cr_uid == clp->lc_uid)
5436 } else if (clp->lc_flags & LCL_GSS)
5439 * For AUTH_SYS, allow the same uid or root. (This is underspecified
5440 * in RFC3530, which talks about principals, but doesn't say anything
5441 * about uids for AUTH_SYS.)
5443 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0)
5450 * Calculate the lease expiry time.
5453 nfsrv_leaseexpiry(void)
5456 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC)
5457 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA));
5458 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA);
5462 * Delay the delegation timeout as far as ls_delegtimelimit, as required.
5465 nfsrv_delaydelegtimeout(struct nfsstate *stp)
5468 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0)
5471 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC &&
5472 stp->ls_delegtime < stp->ls_delegtimelimit) {
5473 stp->ls_delegtime += nfsrv_lease;
5474 if (stp->ls_delegtime > stp->ls_delegtimelimit)
5475 stp->ls_delegtime = stp->ls_delegtimelimit;
5480 * This function checks to see if there is any other state associated
5481 * with the openowner for this Open.
5482 * It returns 1 if there is no other state, 0 otherwise.
5485 nfsrv_nootherstate(struct nfsstate *stp)
5487 struct nfsstate *tstp;
5489 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) {
5490 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock))
5497 * Create a list of lock deltas (changes to local byte range locking
5498 * that can be rolled back using the list) and apply the changes via
5499 * nfsvno_advlock(). Optionally, lock the list. It is expected that either
5500 * the rollback or update function will be called after this.
5501 * It returns an error (and rolls back, as required), if any nfsvno_advlock()
5502 * call fails. If it returns an error, it will unlock the list.
5505 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
5506 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
5508 struct nfslock *lop, *nlop;
5511 /* Loop through the list of locks. */
5512 lop = LIST_FIRST(&lfp->lf_locallock);
5513 while (first < end && lop != NULL) {
5514 nlop = LIST_NEXT(lop, lo_lckowner);
5515 if (first >= lop->lo_end) {
5518 } else if (first < lop->lo_first) {
5519 /* new one starts before entry in list */
5520 if (end <= lop->lo_first) {
5521 /* no overlap between old and new */
5522 error = nfsrv_dolocal(vp, lfp, flags,
5523 NFSLCK_UNLOCK, first, end, cfp, p);
5528 /* handle fragment overlapped with new one */
5529 error = nfsrv_dolocal(vp, lfp, flags,
5530 NFSLCK_UNLOCK, first, lop->lo_first, cfp,
5534 first = lop->lo_first;
5537 /* new one overlaps this entry in list */
5538 if (end <= lop->lo_end) {
5539 /* overlaps all of new one */
5540 error = nfsrv_dolocal(vp, lfp, flags,
5541 lop->lo_flags, first, end, cfp, p);
5546 /* handle fragment overlapped with new one */
5547 error = nfsrv_dolocal(vp, lfp, flags,
5548 lop->lo_flags, first, lop->lo_end, cfp, p);
5551 first = lop->lo_end;
5556 if (first < end && error == 0)
5557 /* handle fragment past end of list */
5558 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first,
5566 * Local lock unlock. Unlock all byte ranges that are no longer locked
5567 * by NFSv4. To do this, unlock any subranges of first-->end that
5568 * do not overlap with the byte ranges of any lock in the lfp->lf_lock
5569 * list. This list has all locks for the file held by other
5570 * <clientid, lockowner> tuples. The list is ordered by increasing
5571 * lo_first value, but may have entries that overlap each other, for
5572 * the case of read locks.
5575 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first,
5576 uint64_t init_end, NFSPROC_T *p)
5578 struct nfslock *lop;
5579 uint64_t first, end, prevfirst;
5583 while (first < init_end) {
5584 /* Loop through all nfs locks, adjusting first and end */
5586 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
5587 KASSERT(prevfirst <= lop->lo_first,
5588 ("nfsv4 locks out of order"));
5589 KASSERT(lop->lo_first < lop->lo_end,
5590 ("nfsv4 bogus lock"));
5591 prevfirst = lop->lo_first;
5592 if (first >= lop->lo_first &&
5593 first < lop->lo_end)
5595 * Overlaps with initial part, so trim
5596 * off that initial part by moving first past
5599 first = lop->lo_end;
5600 else if (end > lop->lo_first &&
5601 lop->lo_first > first) {
5603 * This lock defines the end of the
5604 * segment to unlock, so set end to the
5605 * start of it and break out of the loop.
5607 end = lop->lo_first;
5612 * There is no segment left to do, so
5613 * break out of this loop and then exit
5614 * the outer while() since first will be set
5615 * to end, which must equal init_end here.
5620 /* Unlock this segment */
5621 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK,
5622 NFSLCK_READ, first, end, NULL, p);
5623 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK,
5627 * Now move past this segment and look for any further
5628 * segment in the range, if there is one.
5636 * Do the local lock operation and update the rollback list, as required.
5637 * Perform the rollback and return the error if nfsvno_advlock() fails.
5640 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags,
5641 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
5643 struct nfsrollback *rlp;
5644 int error = 0, ltype, oldltype;
5646 if (flags & NFSLCK_WRITE)
5648 else if (flags & NFSLCK_READ)
5652 if (oldflags & NFSLCK_WRITE)
5654 else if (oldflags & NFSLCK_READ)
5658 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK))
5661 error = nfsvno_advlock(vp, ltype, first, end, p);
5664 cfp->cl_clientid.lval[0] = 0;
5665 cfp->cl_clientid.lval[1] = 0;
5667 cfp->cl_end = NFS64BITSSET;
5668 cfp->cl_flags = NFSLCK_WRITE;
5669 cfp->cl_ownerlen = 5;
5670 NFSBCOPY("LOCAL", cfp->cl_owner, 5);
5672 nfsrv_locallock_rollback(vp, lfp, p);
5673 } else if (ltype != F_UNLCK) {
5674 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK,
5676 rlp->rlck_first = first;
5677 rlp->rlck_end = end;
5678 rlp->rlck_type = oldltype;
5679 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list);
5688 * Roll back local lock changes and free up the rollback list.
5691 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p)
5693 struct nfsrollback *rlp, *nrlp;
5695 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) {
5696 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first,
5698 free(rlp, M_NFSDROLLBACK);
5700 LIST_INIT(&lfp->lf_rollback);
5704 * Update local lock list and delete rollback list (ie now committed to the
5705 * local locks). Most of the work is done by the internal function.
5708 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first,
5711 struct nfsrollback *rlp, *nrlp;
5712 struct nfslock *new_lop, *other_lop;
5714 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK);
5715 if (flags & (NFSLCK_READ | NFSLCK_WRITE))
5716 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK,
5720 new_lop->lo_flags = flags;
5721 new_lop->lo_first = first;
5722 new_lop->lo_end = end;
5723 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp);
5724 if (new_lop != NULL)
5725 free(new_lop, M_NFSDLOCK);
5726 if (other_lop != NULL)
5727 free(other_lop, M_NFSDLOCK);
5729 /* and get rid of the rollback list */
5730 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp)
5731 free(rlp, M_NFSDROLLBACK);
5732 LIST_INIT(&lfp->lf_rollback);
5736 * Lock the struct nfslockfile for local lock updating.
5739 nfsrv_locklf(struct nfslockfile *lfp)
5743 /* lf_usecount ensures *lfp won't be free'd */
5746 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL,
5747 NFSSTATEMUTEXPTR, NULL);
5748 } while (gotlock == 0);
5753 * Unlock the struct nfslockfile after local lock updating.
5756 nfsrv_unlocklf(struct nfslockfile *lfp)
5759 nfsv4_unlock(&lfp->lf_locallock_lck, 0);
5763 * Clear out all state for the NFSv4 server.
5764 * Must be called by a thread that can sleep when no nfsds are running.
5767 nfsrv_throwawayallstate(NFSPROC_T *p)
5769 struct nfsclient *clp, *nclp;
5770 struct nfslockfile *lfp, *nlfp;
5774 * For each client, clean out the state and then free the structure.
5776 for (i = 0; i < nfsrv_clienthashsize; i++) {
5777 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) {
5778 nfsrv_cleanclient(clp, p);
5779 nfsrv_freedeleglist(&clp->lc_deleg);
5780 nfsrv_freedeleglist(&clp->lc_olddeleg);
5781 free(clp->lc_stateid, M_NFSDCLIENT);
5782 free(clp, M_NFSDCLIENT);
5787 * Also, free up any remaining lock file structures.
5789 for (i = 0; i < nfsrv_lockhashsize; i++) {
5790 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) {
5791 printf("nfsd unload: fnd a lock file struct\n");
5792 nfsrv_freenfslockfile(lfp);
5798 * Check the sequence# for the session and slot provided as an argument.
5799 * Also, renew the lease if the session will return NFS_OK.
5802 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid,
5803 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this,
5804 uint32_t *sflagsp, NFSPROC_T *p)
5806 struct nfsdsession *sep;
5807 struct nfssessionhash *shp;
5811 shp = NFSSESSIONHASH(nd->nd_sessionid);
5812 NFSLOCKSESSION(shp);
5813 sep = nfsrv_findsession(nd->nd_sessionid);
5815 NFSUNLOCKSESSION(shp);
5816 return (NFSERR_BADSESSION);
5818 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp,
5819 sep->sess_slots, NULL, NFSV4_SLOTS - 1);
5821 NFSUNLOCKSESSION(shp);
5824 if (cache_this != 0)
5825 nd->nd_flag |= ND_SAVEREPLY;
5826 /* Renew the lease. */
5827 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry();
5828 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval;
5829 nd->nd_flag |= ND_IMPLIEDCLID;
5832 * If this session handles the backchannel, save the nd_xprt for this
5833 * RPC, since this is the one being used.
5835 if (sep->sess_clp->lc_req.nr_client != NULL &&
5836 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) {
5837 savxprt = sep->sess_cbsess.nfsess_xprt;
5838 SVC_ACQUIRE(nd->nd_xprt);
5839 nd->nd_xprt->xp_p2 =
5840 sep->sess_clp->lc_req.nr_client->cl_private;
5841 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */
5842 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
5843 if (savxprt != NULL)
5844 SVC_RELEASE(savxprt);
5848 if (sep->sess_clp->lc_req.nr_client == NULL)
5849 *sflagsp |= NFSV4SEQ_CBPATHDOWN;
5850 NFSUNLOCKSESSION(shp);
5851 if (error == NFSERR_EXPIRED) {
5852 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED;
5854 } else if (error == NFSERR_ADMINREVOKED) {
5855 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED;
5858 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1;
5863 * Check/set reclaim complete for this session/clientid.
5866 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd)
5868 struct nfsdsession *sep;
5869 struct nfssessionhash *shp;
5872 shp = NFSSESSIONHASH(nd->nd_sessionid);
5874 NFSLOCKSESSION(shp);
5875 sep = nfsrv_findsession(nd->nd_sessionid);
5877 NFSUNLOCKSESSION(shp);
5879 return (NFSERR_BADSESSION);
5882 /* Check to see if reclaim complete has already happened. */
5883 if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0)
5884 error = NFSERR_COMPLETEALREADY;
5886 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE;
5887 NFSUNLOCKSESSION(shp);
5893 * Cache the reply in a session slot.
5896 nfsrv_cache_session(uint8_t *sessionid, uint32_t slotid, int repstat,
5899 struct nfsdsession *sep;
5900 struct nfssessionhash *shp;
5902 shp = NFSSESSIONHASH(sessionid);
5903 NFSLOCKSESSION(shp);
5904 sep = nfsrv_findsession(sessionid);
5906 NFSUNLOCKSESSION(shp);
5907 printf("nfsrv_cache_session: no session\n");
5911 nfsv4_seqsess_cacherep(slotid, sep->sess_slots, repstat, m);
5912 NFSUNLOCKSESSION(shp);
5916 * Search for a session that matches the sessionid.
5918 static struct nfsdsession *
5919 nfsrv_findsession(uint8_t *sessionid)
5921 struct nfsdsession *sep;
5922 struct nfssessionhash *shp;
5924 shp = NFSSESSIONHASH(sessionid);
5925 LIST_FOREACH(sep, &shp->list, sess_hash) {
5926 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID))
5933 * Destroy a session.
5936 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid)
5938 int error, samesess;
5941 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID)) {
5943 if ((nd->nd_flag & ND_LASTOP) == 0)
5944 return (NFSERR_BADSESSION);
5946 error = nfsrv_freesession(NULL, sessionid);
5947 if (error == 0 && samesess != 0)
5948 nd->nd_flag &= ~ND_HASSEQUENCE;
5953 * Free up a session structure.
5956 nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid)
5958 struct nfssessionhash *shp;
5963 shp = NFSSESSIONHASH(sessionid);
5964 NFSLOCKSESSION(shp);
5965 sep = nfsrv_findsession(sessionid);
5967 shp = NFSSESSIONHASH(sep->sess_sessionid);
5968 NFSLOCKSESSION(shp);
5972 if (sep->sess_refcnt > 0) {
5973 NFSUNLOCKSESSION(shp);
5977 LIST_REMOVE(sep, sess_hash);
5978 LIST_REMOVE(sep, sess_list);
5980 NFSUNLOCKSESSION(shp);
5983 return (NFSERR_BADSESSION);
5984 for (i = 0; i < NFSV4_SLOTS; i++)
5985 if (sep->sess_slots[i].nfssl_reply != NULL)
5986 m_freem(sep->sess_slots[i].nfssl_reply);
5987 if (sep->sess_cbsess.nfsess_xprt != NULL)
5988 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt);
5989 free(sep, M_NFSDSESSION);
5995 * RFC5661 says that it should fail when there are associated opens, locks
5996 * or delegations. Since stateids represent opens, I don't see how you can
5997 * free an open stateid (it will be free'd when closed), so this function
5998 * only works for lock stateids (freeing the lock_owner) or delegations.
6001 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp,
6004 struct nfsclient *clp;
6005 struct nfsstate *stp;
6010 * Look up the stateid
6012 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
6013 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
6015 /* First, check for a delegation. */
6016 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
6017 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
6022 nfsrv_freedeleg(stp);
6027 /* Not a delegation, try for a lock_owner. */
6029 error = nfsrv_getstate(clp, stateidp, 0, &stp);
6030 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD |
6031 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0))
6032 /* Not a lock_owner stateid. */
6033 error = NFSERR_LOCKSHELD;
6034 if (error == 0 && !LIST_EMPTY(&stp->ls_lock))
6035 error = NFSERR_LOCKSHELD;
6037 nfsrv_freelockowner(stp, NULL, 0, p);
6043 * Generate the xdr for an NFSv4.1 CBSequence Operation.
6046 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
6047 int dont_replycache, struct nfsdsession **sepp)
6049 struct nfsdsession *sep;
6050 uint32_t *tl, slotseq = 0;
6051 int maxslot, slotpos;
6052 uint8_t sessionid[NFSX_V4SESSIONID];
6055 error = nfsv4_getcbsession(clp, sepp);
6059 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot,
6060 &slotseq, sessionid);
6061 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot"));
6063 /* Build the Sequence arguments. */
6064 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED);
6065 bcopy(sessionid, tl, NFSX_V4SESSIONID);
6066 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
6067 nd->nd_slotseq = tl;
6068 *tl++ = txdr_unsigned(slotseq);
6069 *tl++ = txdr_unsigned(slotpos);
6070 *tl++ = txdr_unsigned(maxslot);
6071 if (dont_replycache == 0)
6072 *tl++ = newnfs_true;
6074 *tl++ = newnfs_false;
6075 *tl = 0; /* No referring call list, for now. */
6076 nd->nd_flag |= ND_HASSEQUENCE;
6081 * Get a session for the callback.
6084 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp)
6086 struct nfsdsession *sep;
6089 LIST_FOREACH(sep, &clp->lc_session, sess_list) {
6090 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0)
6095 return (NFSERR_BADSESSION);
6104 * Free up all backchannel xprts. This needs to be done when the nfsd threads
6105 * exit, since those transports will all be going away.
6106 * This is only called after all the nfsd threads are done performing RPCs,
6107 * so locking shouldn't be an issue.
6110 nfsrv_freeallbackchannel_xprts(void)
6112 struct nfsdsession *sep;
6113 struct nfsclient *clp;
6117 for (i = 0; i < nfsrv_clienthashsize; i++) {
6118 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
6119 LIST_FOREACH(sep, &clp->lc_session, sess_list) {
6120 xprt = sep->sess_cbsess.nfsess_xprt;
6121 sep->sess_cbsess.nfsess_xprt = NULL;