2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009 Rick Macklem, University of Guelph
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 #include "opt_inet6.h"
35 #include <sys/extattr.h>
36 #include <fs/nfs/nfsport.h>
38 struct nfsrv_stablefirst nfsrv_stablefirst;
39 int nfsrv_issuedelegs = 0;
40 int nfsrv_dolocallocks = 0;
41 struct nfsv4lock nfsv4rootfs_lock;
42 time_t nfsdev_time = 0;
43 int nfsrv_layouthashsize;
44 volatile int nfsrv_layoutcnt = 0;
46 extern int newnfs_numnfsd;
47 extern struct nfsstatsv1 nfsstatsv1;
48 extern int nfsrv_lease;
49 extern struct timeval nfsboottime;
50 extern u_int32_t newnfs_true, newnfs_false;
51 extern struct mtx nfsrv_dslock_mtx;
52 extern struct mtx nfsrv_recalllock_mtx;
53 extern struct mtx nfsrv_dontlistlock_mtx;
54 extern int nfsd_debuglevel;
55 extern u_int nfsrv_dsdirsize;
56 extern struct nfsdevicehead nfsrv_devidhead;
57 extern int nfsrv_doflexfile;
58 extern int nfsrv_maxpnfsmirror;
61 extern struct nfsdontlisthead nfsrv_dontlisthead;
62 extern volatile int nfsrv_devidcnt;
63 extern struct nfslayouthead nfsrv_recalllisthead;
64 extern char *nfsrv_zeropnfsdat;
66 SYSCTL_DECL(_vfs_nfsd);
67 int nfsrv_statehashsize = NFSSTATEHASHSIZE;
68 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN,
69 &nfsrv_statehashsize, 0,
70 "Size of state hash table set via loader.conf");
72 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE;
73 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN,
74 &nfsrv_clienthashsize, 0,
75 "Size of client hash table set via loader.conf");
77 int nfsrv_lockhashsize = NFSLOCKHASHSIZE;
78 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN,
79 &nfsrv_lockhashsize, 0,
80 "Size of file handle hash table set via loader.conf");
82 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE;
83 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN,
84 &nfsrv_sessionhashsize, 0,
85 "Size of session hash table set via loader.conf");
87 int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER;
88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN,
89 &nfsrv_layouthighwater, 0,
90 "High water mark for number of layouts set via loader.conf");
92 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT;
93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN,
94 &nfsrv_v4statelimit, 0,
95 "High water limit for NFSv4 opens+locks+delegations");
97 static int nfsrv_writedelegifpos = 0;
98 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW,
99 &nfsrv_writedelegifpos, 0,
100 "Issue a write delegation for read opens if possible");
102 static int nfsrv_allowreadforwriteopen = 1;
103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW,
104 &nfsrv_allowreadforwriteopen, 0,
105 "Allow Reads to be done with Write Access StateIDs");
107 int nfsrv_pnfsatime = 0;
108 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW,
110 "For pNFS service, do Getattr ops to keep atime up-to-date");
112 int nfsrv_flexlinuxhack = 0;
113 SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW,
114 &nfsrv_flexlinuxhack, 0,
115 "For Linux clients, hack around Flex File Layout bug");
118 * Hash lists for nfs V4.
120 struct nfsclienthashhead *nfsclienthash;
121 struct nfslockhashhead *nfslockhash;
122 struct nfssessionhash *nfssessionhash;
123 struct nfslayouthash *nfslayouthash;
124 volatile int nfsrv_dontlistlen = 0;
126 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0;
127 static time_t nfsrvboottime;
128 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0;
129 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER;
130 static int nfsrv_nogsscallback = 0;
131 static volatile int nfsrv_writedelegcnt = 0;
132 static int nfsrv_faildscnt;
134 /* local functions */
135 static void nfsrv_dumpaclient(struct nfsclient *clp,
136 struct nfsd_dumpclients *dumpp);
137 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep,
139 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep,
141 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
143 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp,
144 int cansleep, NFSPROC_T *p);
145 static void nfsrv_freenfslock(struct nfslock *lop);
146 static void nfsrv_freenfslockfile(struct nfslockfile *lfp);
147 static void nfsrv_freedeleg(struct nfsstate *);
148 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp,
149 u_int32_t flags, struct nfsstate **stpp);
150 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
151 struct nfsstate **stpp);
152 static int nfsrv_getlockfh(vnode_t vp, u_short flags,
153 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p);
154 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
155 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit);
156 static void nfsrv_insertlock(struct nfslock *new_lop,
157 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp);
158 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
159 struct nfslock **other_lopp, struct nfslockfile *lfp);
160 static int nfsrv_getipnumber(u_char *cp);
161 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
162 nfsv4stateid_t *stateidp, int specialid);
163 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
165 static int nfsrv_docallback(struct nfsclient *clp, int procnum,
166 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp,
167 struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p);
168 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
169 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp);
170 static u_int32_t nfsrv_nextclientindex(void);
171 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp);
172 static void nfsrv_markstable(struct nfsclient *clp);
173 static void nfsrv_markreclaim(struct nfsclient *clp);
174 static int nfsrv_checkstable(struct nfsclient *clp);
175 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct
176 vnode *vp, NFSPROC_T *p);
177 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp,
178 NFSPROC_T *p, vnode_t vp);
179 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
180 struct nfsclient *clp, int *haslockp, NFSPROC_T *p);
181 static int nfsrv_notsamecredname(struct nfsrv_descript *nd,
182 struct nfsclient *clp);
183 static time_t nfsrv_leaseexpiry(void);
184 static void nfsrv_delaydelegtimeout(struct nfsstate *stp);
185 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
186 struct nfsstate *stp, struct nfsrvcache *op);
187 static int nfsrv_nootherstate(struct nfsstate *stp);
188 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
189 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p);
190 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp,
191 uint64_t init_first, uint64_t init_end, NFSPROC_T *p);
192 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags,
193 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp,
195 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp,
197 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags,
198 uint64_t first, uint64_t end);
199 static void nfsrv_locklf(struct nfslockfile *lfp);
200 static void nfsrv_unlocklf(struct nfslockfile *lfp);
201 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid);
202 static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid);
203 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
204 int dont_replycache, struct nfsdsession **sepp);
205 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp);
206 static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp,
207 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p);
208 static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp);
209 static void nfsrv_freelayoutlist(nfsquad_t clientid);
210 static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype,
212 static void nfsrv_freealllayouts(void);
213 static void nfsrv_freedevid(struct nfsdevice *ds);
214 static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p,
215 struct nfsdevice **dsp);
216 static void nfsrv_deleteds(struct nfsdevice *fndds);
217 static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost);
218 static void nfsrv_freealldevids(void);
219 static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp,
220 int maxcnt, NFSPROC_T *p);
221 static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp,
222 fhandle_t *fhp, struct nfslayout *lyp, int changed, int laytype,
224 static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype,
225 NFSPROC_T *, struct nfslayout **lypp);
226 static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt);
227 static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode,
228 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs);
229 static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode,
230 int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs);
231 static int nfsrv_dontlayout(fhandle_t *fhp);
232 static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf,
233 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p,
235 static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp);
238 * Scan the client list for a match and either return the current one,
239 * create a new entry or return an error.
240 * If returning a non-error, the clp structure must either be linked into
241 * the client list or free'd.
244 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp,
245 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p)
247 struct nfsclient *clp = NULL, *new_clp = *new_clpp;
248 int i, error = 0, ret;
249 struct nfsstate *stp, *tstp;
251 struct sockaddr_in *sin, *rin;
254 struct sockaddr_in6 *sin6, *rin6;
256 struct nfsdsession *sep, *nsep;
257 int zapit = 0, gotit, hasstate = 0, igotlock;
258 static u_int64_t confirm_index = 0;
261 * Check for state resource limit exceeded.
263 if (nfsrv_openpluslock > nfsrv_v4statelimit) {
264 error = NFSERR_RESOURCE;
268 if (nfsrv_issuedelegs == 0 ||
269 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0))
271 * Don't do callbacks when delegations are disabled or
272 * for AUTH_GSS unless enabled via nfsrv_nogsscallback.
273 * If establishing a callback connection is attempted
274 * when a firewall is blocking the callback path, the
275 * server may wait too long for the connect attempt to
276 * succeed during the Open. Some clients, such as Linux,
277 * may timeout and give up on the Open before the server
278 * replies. Also, since AUTH_GSS callbacks are not
279 * yet interoperability tested, they might cause the
280 * server to crap out, if they get past the Init call to
283 new_clp->lc_program = 0;
285 /* Lock out other nfsd threads */
286 NFSLOCKV4ROOTMUTEX();
287 nfsv4_relref(&nfsv4rootfs_lock);
289 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
290 NFSV4ROOTLOCKMUTEXPTR, NULL);
292 NFSUNLOCKV4ROOTMUTEX();
295 * Search for a match in the client list.
298 while (i < nfsrv_clienthashsize && !gotit) {
299 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
300 if (new_clp->lc_idlen == clp->lc_idlen &&
301 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) {
310 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) {
311 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) {
313 * For NFSv4.1, if confirmp->lval[1] is non-zero, the
314 * client is trying to update a confirmed clientid.
316 NFSLOCKV4ROOTMUTEX();
317 nfsv4_unlock(&nfsv4rootfs_lock, 1);
318 NFSUNLOCKV4ROOTMUTEX();
319 confirmp->lval[1] = 0;
320 error = NFSERR_NOENT;
324 * Get rid of the old one.
326 if (i != nfsrv_clienthashsize) {
327 LIST_REMOVE(clp, lc_hash);
328 nfsrv_cleanclient(clp, p);
329 nfsrv_freedeleglist(&clp->lc_deleg);
330 nfsrv_freedeleglist(&clp->lc_olddeleg);
334 * Add it after assigning a client id to it.
336 new_clp->lc_flags |= LCL_NEEDSCONFIRM;
337 if ((nd->nd_flag & ND_NFSV41) != 0)
338 new_clp->lc_confirm.lval[0] = confirmp->lval[0] =
341 confirmp->qval = new_clp->lc_confirm.qval =
343 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
344 (u_int32_t)nfsrvboottime;
345 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
346 nfsrv_nextclientindex();
347 new_clp->lc_stateindex = 0;
348 new_clp->lc_statemaxindex = 0;
349 new_clp->lc_cbref = 0;
350 new_clp->lc_expiry = nfsrv_leaseexpiry();
351 LIST_INIT(&new_clp->lc_open);
352 LIST_INIT(&new_clp->lc_deleg);
353 LIST_INIT(&new_clp->lc_olddeleg);
354 LIST_INIT(&new_clp->lc_session);
355 for (i = 0; i < nfsrv_statehashsize; i++)
356 LIST_INIT(&new_clp->lc_stateid[i]);
357 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
359 nfsstatsv1.srvclients++;
360 nfsrv_openpluslock++;
362 NFSLOCKV4ROOTMUTEX();
363 nfsv4_unlock(&nfsv4rootfs_lock, 1);
364 NFSUNLOCKV4ROOTMUTEX();
366 nfsrv_zapclient(clp, p);
372 * Now, handle the cases where the id is already issued.
374 if (nfsrv_notsamecredname(nd, clp)) {
376 * Check to see if there is expired state that should go away.
378 if (clp->lc_expiry < NFSD_MONOSEC &&
379 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) {
380 nfsrv_cleanclient(clp, p);
381 nfsrv_freedeleglist(&clp->lc_deleg);
385 * If there is outstanding state, then reply NFSERR_CLIDINUSE per
386 * RFC3530 Sec. 8.1.2 last para.
388 if (!LIST_EMPTY(&clp->lc_deleg)) {
390 } else if (LIST_EMPTY(&clp->lc_open)) {
394 /* Look for an Open on the OpenOwner */
395 LIST_FOREACH(stp, &clp->lc_open, ls_list) {
396 if (!LIST_EMPTY(&stp->ls_open)) {
404 * If the uid doesn't match, return NFSERR_CLIDINUSE after
405 * filling out the correct ipaddr and portnum.
407 switch (clp->lc_req.nr_nam->sa_family) {
410 sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam;
411 rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
412 sin->sin_addr.s_addr = rin->sin_addr.s_addr;
413 sin->sin_port = rin->sin_port;
418 sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam;
419 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
420 sin6->sin6_addr = rin6->sin6_addr;
421 sin6->sin6_port = rin6->sin6_port;
425 NFSLOCKV4ROOTMUTEX();
426 nfsv4_unlock(&nfsv4rootfs_lock, 1);
427 NFSUNLOCKV4ROOTMUTEX();
428 error = NFSERR_CLIDINUSE;
433 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) {
435 * If the verifier has changed, the client has rebooted
436 * and a new client id is issued. The old state info
437 * can be thrown away once the SETCLIENTID_CONFIRM occurs.
439 LIST_REMOVE(clp, lc_hash);
441 /* Get rid of all sessions on this clientid. */
442 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) {
443 ret = nfsrv_freesession(sep, NULL);
445 printf("nfsrv_setclient: verifier changed free"
446 " session failed=%d\n", ret);
449 new_clp->lc_flags |= LCL_NEEDSCONFIRM;
450 if ((nd->nd_flag & ND_NFSV41) != 0)
451 new_clp->lc_confirm.lval[0] = confirmp->lval[0] =
454 confirmp->qval = new_clp->lc_confirm.qval =
456 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
458 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
459 nfsrv_nextclientindex();
460 new_clp->lc_stateindex = 0;
461 new_clp->lc_statemaxindex = 0;
462 new_clp->lc_cbref = 0;
463 new_clp->lc_expiry = nfsrv_leaseexpiry();
466 * Save the state until confirmed.
468 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
469 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
470 tstp->ls_clp = new_clp;
471 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
472 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
473 tstp->ls_clp = new_clp;
474 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg,
476 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
477 tstp->ls_clp = new_clp;
478 for (i = 0; i < nfsrv_statehashsize; i++) {
479 LIST_NEWHEAD(&new_clp->lc_stateid[i],
480 &clp->lc_stateid[i], ls_hash);
481 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
482 tstp->ls_clp = new_clp;
484 LIST_INIT(&new_clp->lc_session);
485 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
487 nfsstatsv1.srvclients++;
488 nfsrv_openpluslock++;
490 NFSLOCKV4ROOTMUTEX();
491 nfsv4_unlock(&nfsv4rootfs_lock, 1);
492 NFSUNLOCKV4ROOTMUTEX();
495 * Must wait until any outstanding callback on the old clp
499 while (clp->lc_cbref) {
500 clp->lc_flags |= LCL_WAKEUPWANTED;
501 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
502 "nfsd clp", 10 * hz);
505 nfsrv_zapclient(clp, p);
510 /* For NFSv4.1, mark that we found a confirmed clientid. */
511 if ((nd->nd_flag & ND_NFSV41) != 0) {
512 clientidp->lval[0] = clp->lc_clientid.lval[0];
513 clientidp->lval[1] = clp->lc_clientid.lval[1];
514 confirmp->lval[0] = 0; /* Ignored by client */
515 confirmp->lval[1] = 1;
518 * id and verifier match, so update the net address info
519 * and get rid of any existing callback authentication
520 * handle, so a new one will be acquired.
522 LIST_REMOVE(clp, lc_hash);
523 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
524 new_clp->lc_expiry = nfsrv_leaseexpiry();
525 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index;
526 clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
527 clp->lc_clientid.lval[0];
528 clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
529 clp->lc_clientid.lval[1];
530 new_clp->lc_delegtime = clp->lc_delegtime;
531 new_clp->lc_stateindex = clp->lc_stateindex;
532 new_clp->lc_statemaxindex = clp->lc_statemaxindex;
533 new_clp->lc_cbref = 0;
534 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
535 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
536 tstp->ls_clp = new_clp;
537 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
538 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
539 tstp->ls_clp = new_clp;
540 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list);
541 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
542 tstp->ls_clp = new_clp;
543 for (i = 0; i < nfsrv_statehashsize; i++) {
544 LIST_NEWHEAD(&new_clp->lc_stateid[i],
545 &clp->lc_stateid[i], ls_hash);
546 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
547 tstp->ls_clp = new_clp;
549 LIST_INIT(&new_clp->lc_session);
550 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
552 nfsstatsv1.srvclients++;
553 nfsrv_openpluslock++;
556 NFSLOCKV4ROOTMUTEX();
557 nfsv4_unlock(&nfsv4rootfs_lock, 1);
558 NFSUNLOCKV4ROOTMUTEX();
560 if ((nd->nd_flag & ND_NFSV41) == 0) {
562 * Must wait until any outstanding callback on the old clp
566 while (clp->lc_cbref) {
567 clp->lc_flags |= LCL_WAKEUPWANTED;
568 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
572 nfsrv_zapclient(clp, p);
577 NFSEXITCODE2(error, nd);
582 * Check to see if the client id exists and optionally confirm it.
585 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp,
586 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram,
587 struct nfsrv_descript *nd, NFSPROC_T *p)
589 struct nfsclient *clp;
590 struct nfsstate *stp;
592 struct nfsclienthashhead *hp;
593 int error = 0, igotlock, doneok;
594 struct nfssessionhash *shp;
595 struct nfsdsession *sep;
597 static uint64_t next_sess = 0;
601 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 ||
602 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) {
603 error = NFSERR_STALECLIENTID;
608 * If called with opflags == CLOPS_RENEW, the State Lock is
609 * already held. Otherwise, we need to get either that or,
610 * for the case of Confirm, lock out the nfsd threads.
612 if (opflags & CLOPS_CONFIRM) {
613 NFSLOCKV4ROOTMUTEX();
614 nfsv4_relref(&nfsv4rootfs_lock);
616 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
617 NFSV4ROOTLOCKMUTEXPTR, NULL);
620 * Create a new sessionid here, since we need to do it where
621 * there is a mutex held to serialize update of next_sess.
623 if ((nd->nd_flag & ND_NFSV41) != 0) {
624 sessid[0] = ++next_sess;
625 sessid[1] = clientid.qval;
627 NFSUNLOCKV4ROOTMUTEX();
628 } else if (opflags != CLOPS_RENEW) {
632 /* For NFSv4.1, the clp is acquired from the associated session. */
633 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 &&
634 opflags == CLOPS_RENEW) {
636 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) {
637 shp = NFSSESSIONHASH(nd->nd_sessionid);
639 sep = nfsrv_findsession(nd->nd_sessionid);
642 NFSUNLOCKSESSION(shp);
645 hp = NFSCLIENTHASH(clientid);
646 LIST_FOREACH(clp, hp, lc_hash) {
647 if (clp->lc_clientid.lval[1] == clientid.lval[1])
652 if (opflags & CLOPS_CONFIRM)
653 error = NFSERR_STALECLIENTID;
655 error = NFSERR_EXPIRED;
656 } else if (clp->lc_flags & LCL_ADMINREVOKED) {
658 * If marked admin revoked, just return the error.
660 error = NFSERR_ADMINREVOKED;
663 if (opflags & CLOPS_CONFIRM) {
664 NFSLOCKV4ROOTMUTEX();
665 nfsv4_unlock(&nfsv4rootfs_lock, 1);
666 NFSUNLOCKV4ROOTMUTEX();
667 } else if (opflags != CLOPS_RENEW) {
674 * Perform any operations specified by the opflags.
676 if (opflags & CLOPS_CONFIRM) {
677 if (((nd->nd_flag & ND_NFSV41) != 0 &&
678 clp->lc_confirm.lval[0] != confirm.lval[0]) ||
679 ((nd->nd_flag & ND_NFSV41) == 0 &&
680 clp->lc_confirm.qval != confirm.qval))
681 error = NFSERR_STALECLIENTID;
682 else if (nfsrv_notsamecredname(nd, clp))
683 error = NFSERR_CLIDINUSE;
686 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) ==
689 * Hang onto the delegations (as old delegations)
690 * for an Open with CLAIM_DELEGATE_PREV unless in
691 * grace, but get rid of the rest of the state.
693 nfsrv_cleanclient(clp, p);
694 nfsrv_freedeleglist(&clp->lc_olddeleg);
695 if (nfsrv_checkgrace(nd, clp, 0)) {
696 /* In grace, so just delete delegations */
697 nfsrv_freedeleglist(&clp->lc_deleg);
699 LIST_FOREACH(stp, &clp->lc_deleg, ls_list)
700 stp->ls_flags |= NFSLCK_OLDDELEG;
701 clp->lc_delegtime = NFSD_MONOSEC +
702 nfsrv_lease + NFSRV_LEASEDELTA;
703 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg,
706 if ((nd->nd_flag & ND_NFSV41) != 0)
707 clp->lc_program = cbprogram;
709 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
711 clp->lc_flags |= LCL_NEEDSCBNULL;
712 /* For NFSv4.1, link the session onto the client. */
714 /* Hold a reference on the xprt for a backchannel. */
715 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN)
717 if (clp->lc_req.nr_client == NULL)
718 clp->lc_req.nr_client = (struct __rpc_client *)
719 clnt_bck_create(nd->nd_xprt->xp_socket,
720 cbprogram, NFSV4_CBVERS);
721 if (clp->lc_req.nr_client != NULL) {
722 SVC_ACQUIRE(nd->nd_xprt);
724 clp->lc_req.nr_client->cl_private;
725 /* Disable idle timeout. */
726 nd->nd_xprt->xp_idletimeout = 0;
727 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
729 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN;
731 NFSBCOPY(sessid, nsep->sess_sessionid,
733 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid,
735 shp = NFSSESSIONHASH(nsep->sess_sessionid);
738 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash);
739 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list);
740 nsep->sess_clp = clp;
741 NFSUNLOCKSESSION(shp);
745 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) {
746 error = NFSERR_EXPIRED;
750 * If called by the Renew Op, we must check the principal.
752 if (!error && (opflags & CLOPS_RENEWOP)) {
753 if (nfsrv_notsamecredname(nd, clp)) {
755 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) {
756 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
757 if ((stp->ls_flags & NFSLCK_OPEN) &&
758 stp->ls_uid == nd->nd_cred->cr_uid) {
765 error = NFSERR_ACCES;
767 if (!error && (clp->lc_flags & LCL_CBDOWN))
768 error = NFSERR_CBPATHDOWN;
770 if ((!error || error == NFSERR_CBPATHDOWN) &&
771 (opflags & CLOPS_RENEW)) {
772 clp->lc_expiry = nfsrv_leaseexpiry();
774 if (opflags & CLOPS_CONFIRM) {
775 NFSLOCKV4ROOTMUTEX();
776 nfsv4_unlock(&nfsv4rootfs_lock, 1);
777 NFSUNLOCKV4ROOTMUTEX();
778 } else if (opflags != CLOPS_RENEW) {
785 NFSEXITCODE2(error, nd);
790 * Perform the NFSv4.1 destroy clientid.
793 nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p)
795 struct nfsclient *clp;
796 struct nfsclienthashhead *hp;
797 int error = 0, i, igotlock;
799 if (nfsrvboottime != clientid.lval[0]) {
800 error = NFSERR_STALECLIENTID;
804 /* Lock out other nfsd threads */
805 NFSLOCKV4ROOTMUTEX();
806 nfsv4_relref(&nfsv4rootfs_lock);
808 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
809 NFSV4ROOTLOCKMUTEXPTR, NULL);
810 } while (igotlock == 0);
811 NFSUNLOCKV4ROOTMUTEX();
813 hp = NFSCLIENTHASH(clientid);
814 LIST_FOREACH(clp, hp, lc_hash) {
815 if (clp->lc_clientid.lval[1] == clientid.lval[1])
819 NFSLOCKV4ROOTMUTEX();
820 nfsv4_unlock(&nfsv4rootfs_lock, 1);
821 NFSUNLOCKV4ROOTMUTEX();
822 /* Just return ok, since it is gone. */
827 * Free up all layouts on the clientid. Should the client return the
830 nfsrv_freelayoutlist(clientid);
832 /* Scan for state on the clientid. */
833 for (i = 0; i < nfsrv_statehashsize; i++)
834 if (!LIST_EMPTY(&clp->lc_stateid[i])) {
835 NFSLOCKV4ROOTMUTEX();
836 nfsv4_unlock(&nfsv4rootfs_lock, 1);
837 NFSUNLOCKV4ROOTMUTEX();
838 error = NFSERR_CLIENTIDBUSY;
841 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) {
842 NFSLOCKV4ROOTMUTEX();
843 nfsv4_unlock(&nfsv4rootfs_lock, 1);
844 NFSUNLOCKV4ROOTMUTEX();
845 error = NFSERR_CLIENTIDBUSY;
849 /* Destroy the clientid and return ok. */
850 nfsrv_cleanclient(clp, p);
851 nfsrv_freedeleglist(&clp->lc_deleg);
852 nfsrv_freedeleglist(&clp->lc_olddeleg);
853 LIST_REMOVE(clp, lc_hash);
854 NFSLOCKV4ROOTMUTEX();
855 nfsv4_unlock(&nfsv4rootfs_lock, 1);
856 NFSUNLOCKV4ROOTMUTEX();
857 nfsrv_zapclient(clp, p);
859 NFSEXITCODE2(error, nd);
864 * Called from the new nfssvc syscall to admin revoke a clientid.
865 * Returns 0 for success, error otherwise.
868 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p)
870 struct nfsclient *clp = NULL;
875 * First, lock out the nfsd so that state won't change while the
876 * revocation record is being written to the stable storage restart
879 NFSLOCKV4ROOTMUTEX();
881 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
882 NFSV4ROOTLOCKMUTEXPTR, NULL);
884 NFSUNLOCKV4ROOTMUTEX();
887 * Search for a match in the client list.
890 while (i < nfsrv_clienthashsize && !gotit) {
891 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
892 if (revokep->nclid_idlen == clp->lc_idlen &&
893 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) {
901 NFSLOCKV4ROOTMUTEX();
902 nfsv4_unlock(&nfsv4rootfs_lock, 0);
903 NFSUNLOCKV4ROOTMUTEX();
909 * Now, write out the revocation record
911 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
912 nfsrv_backupstable();
915 * and clear out the state, marking the clientid revoked.
917 clp->lc_flags &= ~LCL_CALLBACKSON;
918 clp->lc_flags |= LCL_ADMINREVOKED;
919 nfsrv_cleanclient(clp, p);
920 nfsrv_freedeleglist(&clp->lc_deleg);
921 nfsrv_freedeleglist(&clp->lc_olddeleg);
922 NFSLOCKV4ROOTMUTEX();
923 nfsv4_unlock(&nfsv4rootfs_lock, 0);
924 NFSUNLOCKV4ROOTMUTEX();
932 * Dump out stats for all clients. Called from nfssvc(2), that is used
936 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt)
938 struct nfsclient *clp;
942 * First, get a reference on the nfsv4rootfs_lock so that an
943 * exclusive lock cannot be acquired while dumping the clients.
945 NFSLOCKV4ROOTMUTEX();
946 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
947 NFSUNLOCKV4ROOTMUTEX();
950 * Rattle through the client lists until done.
952 while (i < nfsrv_clienthashsize && cnt < maxcnt) {
953 clp = LIST_FIRST(&nfsclienthash[i]);
954 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) {
955 nfsrv_dumpaclient(clp, &dumpp[cnt]);
957 clp = LIST_NEXT(clp, lc_hash);
962 dumpp[cnt].ndcl_clid.nclid_idlen = 0;
964 NFSLOCKV4ROOTMUTEX();
965 nfsv4_relref(&nfsv4rootfs_lock);
966 NFSUNLOCKV4ROOTMUTEX();
970 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd.
973 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp)
975 struct nfsstate *stp, *openstp, *lckownstp;
979 struct sockaddr_in *rin;
982 struct sockaddr_in6 *rin6;
985 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0;
986 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0;
987 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0;
988 dumpp->ndcl_flags = clp->lc_flags;
989 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen;
990 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen);
991 af = clp->lc_req.nr_nam->sa_family;
992 dumpp->ndcl_addrfam = af;
996 rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
997 dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr;
1002 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
1003 dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr;
1009 * Now, scan the state lists and total up the opens and locks.
1011 LIST_FOREACH(stp, &clp->lc_open, ls_list) {
1012 dumpp->ndcl_nopenowners++;
1013 LIST_FOREACH(openstp, &stp->ls_open, ls_list) {
1014 dumpp->ndcl_nopens++;
1015 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) {
1016 dumpp->ndcl_nlockowners++;
1017 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) {
1018 dumpp->ndcl_nlocks++;
1025 * and the delegation lists.
1027 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
1028 dumpp->ndcl_ndelegs++;
1030 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
1031 dumpp->ndcl_nolddelegs++;
1036 * Dump out lock stats for a file.
1039 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt,
1042 struct nfsstate *stp;
1043 struct nfslock *lop;
1045 struct nfslockfile *lfp;
1048 struct sockaddr_in *rin;
1051 struct sockaddr_in6 *rin6;
1056 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p);
1058 * First, get a reference on the nfsv4rootfs_lock so that an
1059 * exclusive lock on it cannot be acquired while dumping the locks.
1061 NFSLOCKV4ROOTMUTEX();
1062 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
1063 NFSUNLOCKV4ROOTMUTEX();
1066 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0);
1068 ldumpp[0].ndlck_clid.nclid_idlen = 0;
1070 NFSLOCKV4ROOTMUTEX();
1071 nfsv4_relref(&nfsv4rootfs_lock);
1072 NFSUNLOCKV4ROOTMUTEX();
1077 * For each open share on file, dump it out.
1079 stp = LIST_FIRST(&lfp->lf_open);
1080 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) {
1081 ldumpp[cnt].ndlck_flags = stp->ls_flags;
1082 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
1083 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
1084 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
1085 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
1086 ldumpp[cnt].ndlck_owner.nclid_idlen =
1087 stp->ls_openowner->ls_ownerlen;
1088 NFSBCOPY(stp->ls_openowner->ls_owner,
1089 ldumpp[cnt].ndlck_owner.nclid_id,
1090 stp->ls_openowner->ls_ownerlen);
1091 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
1092 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
1093 stp->ls_clp->lc_idlen);
1094 af = stp->ls_clp->lc_req.nr_nam->sa_family;
1095 ldumpp[cnt].ndlck_addrfam = af;
1099 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
1100 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
1105 rin6 = (struct sockaddr_in6 *)
1106 stp->ls_clp->lc_req.nr_nam;
1107 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
1111 stp = LIST_NEXT(stp, ls_file);
1118 lop = LIST_FIRST(&lfp->lf_lock);
1119 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) {
1121 ldumpp[cnt].ndlck_flags = lop->lo_flags;
1122 ldumpp[cnt].ndlck_first = lop->lo_first;
1123 ldumpp[cnt].ndlck_end = lop->lo_end;
1124 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
1125 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
1126 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
1127 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
1128 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen;
1129 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id,
1131 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
1132 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
1133 stp->ls_clp->lc_idlen);
1134 af = stp->ls_clp->lc_req.nr_nam->sa_family;
1135 ldumpp[cnt].ndlck_addrfam = af;
1139 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
1140 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
1145 rin6 = (struct sockaddr_in6 *)
1146 stp->ls_clp->lc_req.nr_nam;
1147 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
1151 lop = LIST_NEXT(lop, lo_lckfile);
1156 * and the delegations.
1158 stp = LIST_FIRST(&lfp->lf_deleg);
1159 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) {
1160 ldumpp[cnt].ndlck_flags = stp->ls_flags;
1161 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
1162 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
1163 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
1164 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
1165 ldumpp[cnt].ndlck_owner.nclid_idlen = 0;
1166 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
1167 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
1168 stp->ls_clp->lc_idlen);
1169 af = stp->ls_clp->lc_req.nr_nam->sa_family;
1170 ldumpp[cnt].ndlck_addrfam = af;
1174 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
1175 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
1180 rin6 = (struct sockaddr_in6 *)
1181 stp->ls_clp->lc_req.nr_nam;
1182 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
1186 stp = LIST_NEXT(stp, ls_file);
1191 * If list isn't full, mark end of list by setting the client name
1195 ldumpp[cnt].ndlck_clid.nclid_idlen = 0;
1197 NFSLOCKV4ROOTMUTEX();
1198 nfsv4_relref(&nfsv4rootfs_lock);
1199 NFSUNLOCKV4ROOTMUTEX();
1203 * Server timer routine. It can scan any linked list, so long
1204 * as it holds the spin/mutex lock and there is no exclusive lock on
1206 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok
1207 * to do this from a callout, since the spin locks work. For
1208 * Darwin, I'm not sure what will work correctly yet.)
1209 * Should be called once per second.
1212 nfsrv_servertimer(void)
1214 struct nfsclient *clp, *nclp;
1215 struct nfsstate *stp, *nstp;
1219 * Make sure nfsboottime is set. This is used by V3 as well
1220 * as V4. Note that nfsboottime is not nfsrvboottime, which is
1221 * only used by the V4 server for leases.
1223 if (nfsboottime.tv_sec == 0)
1224 NFSSETBOOTTIME(nfsboottime);
1227 * If server hasn't started yet, just return.
1230 if (nfsrv_stablefirst.nsf_eograce == 0) {
1234 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) {
1235 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) &&
1236 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce)
1237 nfsrv_stablefirst.nsf_flags |=
1238 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
1244 * Try and get a reference count on the nfsv4rootfs_lock so that
1245 * no nfsd thread can acquire an exclusive lock on it before this
1246 * call is done. If it is already exclusively locked, just return.
1248 NFSLOCKV4ROOTMUTEX();
1249 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock);
1250 NFSUNLOCKV4ROOTMUTEX();
1257 * For each client...
1259 for (i = 0; i < nfsrv_clienthashsize; i++) {
1260 clp = LIST_FIRST(&nfsclienthash[i]);
1261 while (clp != LIST_END(&nfsclienthash[i])) {
1262 nclp = LIST_NEXT(clp, lc_hash);
1263 if (!(clp->lc_flags & LCL_EXPIREIT)) {
1264 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC
1265 && ((LIST_EMPTY(&clp->lc_deleg)
1266 && LIST_EMPTY(&clp->lc_open)) ||
1267 nfsrv_clients > nfsrv_clienthighwater)) ||
1268 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC ||
1269 (clp->lc_expiry < NFSD_MONOSEC &&
1270 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) {
1272 * Lease has expired several nfsrv_lease times ago:
1274 * - no state is associated with it
1276 * - above high water mark for number of clients
1277 * (nfsrv_clienthighwater should be large enough
1278 * that this only occurs when clients fail to
1279 * use the same nfs_client_id4.id. Maybe somewhat
1280 * higher that the maximum number of clients that
1281 * will mount this server?)
1283 * Lease has expired a very long time ago
1285 * Lease has expired PLUS the number of opens + locks
1286 * has exceeded 90% of capacity
1288 * --> Mark for expiry. The actual expiry will be done
1289 * by an nfsd sometime soon.
1291 clp->lc_flags |= LCL_EXPIREIT;
1292 nfsrv_stablefirst.nsf_flags |=
1293 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT);
1296 * If there are no opens, increment no open tick cnt
1297 * If time exceeds NFSNOOPEN, mark it to be thrown away
1298 * otherwise, if there is an open, reset no open time
1299 * Hopefully, this will avoid excessive re-creation
1300 * of open owners and subsequent open confirms.
1302 stp = LIST_FIRST(&clp->lc_open);
1303 while (stp != LIST_END(&clp->lc_open)) {
1304 nstp = LIST_NEXT(stp, ls_list);
1305 if (LIST_EMPTY(&stp->ls_open)) {
1307 if (stp->ls_noopens > NFSNOOPEN ||
1308 (nfsrv_openpluslock * 2) >
1310 nfsrv_stablefirst.nsf_flags |=
1313 stp->ls_noopens = 0;
1323 NFSLOCKV4ROOTMUTEX();
1324 nfsv4_relref(&nfsv4rootfs_lock);
1325 NFSUNLOCKV4ROOTMUTEX();
1329 * The following set of functions free up the various data structures.
1332 * Clear out all open/lock state related to this nfsclient.
1333 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that
1334 * there are no other active nfsd threads.
1337 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p)
1339 struct nfsstate *stp, *nstp;
1340 struct nfsdsession *sep, *nsep;
1342 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp)
1343 nfsrv_freeopenowner(stp, 1, p);
1344 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0)
1345 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep)
1346 (void)nfsrv_freesession(sep, NULL);
1350 * Free a client that has been cleaned. It should also already have been
1351 * removed from the lists.
1352 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when
1353 * softclock interrupts are enabled.)
1356 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p)
1360 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) ==
1361 (LCL_GSS | LCL_CALLBACKSON) &&
1362 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) &&
1363 clp->lc_handlelen > 0) {
1364 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE;
1365 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED;
1366 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL,
1367 NULL, 0, NULL, NULL, NULL, 0, p);
1370 newnfs_disconnect(&clp->lc_req);
1371 free(clp->lc_req.nr_nam, M_SONAME);
1372 NFSFREEMUTEX(&clp->lc_req.nr_mtx);
1373 free(clp->lc_stateid, M_NFSDCLIENT);
1374 free(clp, M_NFSDCLIENT);
1376 nfsstatsv1.srvclients--;
1377 nfsrv_openpluslock--;
1383 * Free a list of delegation state structures.
1384 * (This function will also free all nfslockfile structures that no
1385 * longer have associated state.)
1388 nfsrv_freedeleglist(struct nfsstatehead *sthp)
1390 struct nfsstate *stp, *nstp;
1392 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) {
1393 nfsrv_freedeleg(stp);
1399 * Free up a delegation.
1402 nfsrv_freedeleg(struct nfsstate *stp)
1404 struct nfslockfile *lfp;
1406 LIST_REMOVE(stp, ls_hash);
1407 LIST_REMOVE(stp, ls_list);
1408 LIST_REMOVE(stp, ls_file);
1409 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0)
1410 nfsrv_writedelegcnt--;
1412 if (LIST_EMPTY(&lfp->lf_open) &&
1413 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) &&
1414 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
1415 lfp->lf_usecount == 0 &&
1416 nfsv4_testlock(&lfp->lf_locallock_lck) == 0)
1417 nfsrv_freenfslockfile(lfp);
1418 free(stp, M_NFSDSTATE);
1419 nfsstatsv1.srvdelegates--;
1420 nfsrv_openpluslock--;
1421 nfsrv_delegatecnt--;
1425 * This function frees an open owner and all associated opens.
1428 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p)
1430 struct nfsstate *nstp, *tstp;
1432 LIST_REMOVE(stp, ls_list);
1434 * Now, free all associated opens.
1436 nstp = LIST_FIRST(&stp->ls_open);
1437 while (nstp != LIST_END(&stp->ls_open)) {
1439 nstp = LIST_NEXT(nstp, ls_list);
1440 (void) nfsrv_freeopen(tstp, NULL, cansleep, p);
1443 nfsrvd_derefcache(stp->ls_op);
1444 free(stp, M_NFSDSTATE);
1445 nfsstatsv1.srvopenowners--;
1446 nfsrv_openpluslock--;
1450 * This function frees an open (nfsstate open structure) with all associated
1451 * lock_owners and locks. It also frees the nfslockfile structure iff there
1452 * are no other opens on the file.
1453 * Returns 1 if it free'd the nfslockfile, 0 otherwise.
1456 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p)
1458 struct nfsstate *nstp, *tstp;
1459 struct nfslockfile *lfp;
1462 LIST_REMOVE(stp, ls_hash);
1463 LIST_REMOVE(stp, ls_list);
1464 LIST_REMOVE(stp, ls_file);
1468 * Now, free all lockowners associated with this open.
1470 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp)
1471 nfsrv_freelockowner(tstp, vp, cansleep, p);
1474 * The nfslockfile is freed here if there are no locks
1475 * associated with the open.
1476 * If there are locks associated with the open, the
1477 * nfslockfile structure can be freed via nfsrv_freelockowner().
1478 * Acquire the state mutex to avoid races with calls to
1479 * nfsrv_getlockfile().
1483 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) &&
1484 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) &&
1485 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
1486 lfp->lf_usecount == 0 &&
1487 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) {
1488 nfsrv_freenfslockfile(lfp);
1494 free(stp, M_NFSDSTATE);
1495 nfsstatsv1.srvopens--;
1496 nfsrv_openpluslock--;
1501 * Frees a lockowner and all associated locks.
1504 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
1508 LIST_REMOVE(stp, ls_hash);
1509 LIST_REMOVE(stp, ls_list);
1510 nfsrv_freeallnfslocks(stp, vp, cansleep, p);
1512 nfsrvd_derefcache(stp->ls_op);
1513 free(stp, M_NFSDSTATE);
1514 nfsstatsv1.srvlockowners--;
1515 nfsrv_openpluslock--;
1519 * Free all the nfs locks on a lockowner.
1522 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep,
1525 struct nfslock *lop, *nlop;
1526 struct nfsrollback *rlp, *nrlp;
1527 struct nfslockfile *lfp = NULL;
1530 uint64_t first, end;
1533 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked");
1534 lop = LIST_FIRST(&stp->ls_lock);
1535 while (lop != LIST_END(&stp->ls_lock)) {
1536 nlop = LIST_NEXT(lop, lo_lckowner);
1538 * Since all locks should be for the same file, lfp should
1543 else if (lfp != lop->lo_lfp)
1544 panic("allnfslocks");
1546 * If vp is NULL and cansleep != 0, a vnode must be acquired
1547 * from the file handle. This only occurs when called from
1548 * nfsrv_cleanclient().
1551 if (nfsrv_dolocallocks == 0)
1553 else if (vp == NULL && cansleep != 0) {
1554 tvp = nfsvno_getvp(&lfp->lf_fh);
1565 first = lop->lo_first;
1567 nfsrv_freenfslock(lop);
1568 nfsrv_localunlock(tvp, lfp, first, end, p);
1569 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list,
1571 free(rlp, M_NFSDROLLBACK);
1572 LIST_INIT(&lfp->lf_rollback);
1574 nfsrv_freenfslock(lop);
1577 if (vp == NULL && tvp != NULL)
1582 * Free an nfslock structure.
1585 nfsrv_freenfslock(struct nfslock *lop)
1588 if (lop->lo_lckfile.le_prev != NULL) {
1589 LIST_REMOVE(lop, lo_lckfile);
1590 nfsstatsv1.srvlocks--;
1591 nfsrv_openpluslock--;
1593 LIST_REMOVE(lop, lo_lckowner);
1594 free(lop, M_NFSDLOCK);
1598 * This function frees an nfslockfile structure.
1601 nfsrv_freenfslockfile(struct nfslockfile *lfp)
1604 LIST_REMOVE(lfp, lf_hash);
1605 free(lfp, M_NFSDLOCKFILE);
1609 * This function looks up an nfsstate structure via stateid.
1612 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags,
1613 struct nfsstate **stpp)
1615 struct nfsstate *stp;
1616 struct nfsstatehead *hp;
1620 hp = NFSSTATEHASH(clp, *stateidp);
1621 LIST_FOREACH(stp, hp, ls_hash) {
1622 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
1628 * If no state id in list, return NFSERR_BADSTATEID.
1630 if (stp == LIST_END(hp)) {
1631 error = NFSERR_BADSTATEID;
1642 * This function gets an nfsstate structure via owner string.
1645 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
1646 struct nfsstate **stpp)
1648 struct nfsstate *stp;
1651 LIST_FOREACH(stp, hp, ls_list) {
1652 if (new_stp->ls_ownerlen == stp->ls_ownerlen &&
1653 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) {
1661 * Lock control function called to update lock status.
1662 * Returns 0 upon success, -1 if there is no lock and the flags indicate
1663 * that one isn't to be created and an NFSERR_xxx for other errors.
1664 * The structures new_stp and new_lop are passed in as pointers that should
1665 * be set to NULL if the structure is used and shouldn't be free'd.
1666 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are
1667 * never used and can safely be allocated on the stack. For all other
1668 * cases, *new_stpp and *new_lopp should be malloc'd before the call,
1669 * in case they are used.
1672 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp,
1673 struct nfslock **new_lopp, struct nfslockconflict *cfp,
1674 nfsquad_t clientid, nfsv4stateid_t *stateidp,
1675 __unused struct nfsexstuff *exp,
1676 struct nfsrv_descript *nd, NFSPROC_T *p)
1678 struct nfslock *lop;
1679 struct nfsstate *new_stp = *new_stpp;
1680 struct nfslock *new_lop = *new_lopp;
1681 struct nfsstate *tstp, *mystp, *nstp;
1683 struct nfslockfile *lfp;
1684 struct nfslock *other_lop = NULL;
1685 struct nfsstate *stp, *lckstp = NULL;
1686 struct nfsclient *clp = NULL;
1688 int error = 0, haslock = 0, ret, reterr;
1689 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0;
1691 uint64_t first, end;
1692 uint32_t lock_flags;
1694 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) {
1696 * Note the special cases of "all 1s" or "all 0s" stateids and
1697 * let reads with all 1s go ahead.
1699 if (new_stp->ls_stateid.seqid == 0x0 &&
1700 new_stp->ls_stateid.other[0] == 0x0 &&
1701 new_stp->ls_stateid.other[1] == 0x0 &&
1702 new_stp->ls_stateid.other[2] == 0x0)
1704 else if (new_stp->ls_stateid.seqid == 0xffffffff &&
1705 new_stp->ls_stateid.other[0] == 0xffffffff &&
1706 new_stp->ls_stateid.other[1] == 0xffffffff &&
1707 new_stp->ls_stateid.other[2] == 0xffffffff)
1712 * Check for restart conditions (client and server).
1714 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
1715 &new_stp->ls_stateid, specialid);
1720 * Check for state resource limit exceeded.
1722 if ((new_stp->ls_flags & NFSLCK_LOCK) &&
1723 nfsrv_openpluslock > nfsrv_v4statelimit) {
1724 error = NFSERR_RESOURCE;
1729 * For the lock case, get another nfslock structure,
1730 * just in case we need it.
1731 * Malloc now, before we start sifting through the linked lists,
1732 * in case we have to wait for memory.
1735 if (new_stp->ls_flags & NFSLCK_LOCK)
1736 other_lop = malloc(sizeof (struct nfslock),
1737 M_NFSDLOCK, M_WAITOK);
1738 filestruct_locked = 0;
1743 * Get the lockfile structure for CFH now, so we can do a sanity
1744 * check against the stateid, before incrementing the seqid#, since
1745 * we want to return NFSERR_BADSTATEID on failure and the seqid#
1746 * shouldn't be incremented for this case.
1747 * If nfsrv_getlockfile() returns -1, it means "not found", which
1748 * will be handled later.
1749 * If we are doing Lock/LockU and local locking is enabled, sleep
1750 * lock the nfslockfile structure.
1752 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p);
1754 if (getlckret == 0) {
1755 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 &&
1756 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) {
1757 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
1760 filestruct_locked = 1;
1762 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
1765 if (getlckret != 0 && getlckret != -1)
1768 if (filestruct_locked != 0) {
1769 LIST_INIT(&lfp->lf_rollback);
1770 if ((new_stp->ls_flags & NFSLCK_LOCK)) {
1772 * For local locking, do the advisory locking now, so
1773 * that any conflict can be detected. A failure later
1774 * can be rolled back locally. If an error is returned,
1775 * struct nfslockfile has been unlocked and any local
1776 * locking rolled back.
1779 if (vnode_unlocked == 0) {
1780 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1");
1784 reterr = nfsrv_locallock(vp, lfp,
1785 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)),
1786 new_lop->lo_first, new_lop->lo_end, cfp, p);
1791 if (specialid == 0) {
1792 if (new_stp->ls_flags & NFSLCK_TEST) {
1794 * RFC 3530 does not list LockT as an op that renews a
1795 * lease, but the consensus seems to be that it is ok
1796 * for a server to do so.
1798 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
1799 (nfsquad_t)((u_quad_t)0), 0, nd, p);
1802 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid
1803 * error returns for LockT, just go ahead and test for a lock,
1804 * since there are no locks for this client, but other locks
1805 * can conflict. (ie. same client will always be false)
1807 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED)
1811 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
1812 (nfsquad_t)((u_quad_t)0), 0, nd, p);
1815 * Look up the stateid
1817 error = nfsrv_getstate(clp, &new_stp->ls_stateid,
1818 new_stp->ls_flags, &stp);
1820 * do some sanity checks for an unconfirmed open or a
1821 * stateid that refers to the wrong file, for an open stateid
1823 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) &&
1824 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) ||
1825 (getlckret == 0 && stp->ls_lfp != lfp))){
1827 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID
1828 * The only exception is using SETATTR with SIZE.
1830 if ((new_stp->ls_flags &
1831 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR)
1832 error = NFSERR_BADSTATEID;
1836 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) &&
1837 getlckret == 0 && stp->ls_lfp != lfp)
1838 error = NFSERR_BADSTATEID;
1841 * If the lockowner stateid doesn't refer to the same file,
1842 * I believe that is considered ok, since some clients will
1843 * only create a single lockowner and use that for all locks
1845 * For now, log it as a diagnostic, instead of considering it
1848 if (error == 0 && (stp->ls_flags &
1849 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 &&
1850 getlckret == 0 && stp->ls_lfp != lfp) {
1852 printf("Got a lock statid for different file open\n");
1855 error = NFSERR_BADSTATEID;
1860 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) {
1862 * If haslock set, we've already checked the seqid.
1865 if (stp->ls_flags & NFSLCK_OPEN)
1866 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
1867 stp->ls_openowner, new_stp->ls_op);
1869 error = NFSERR_BADSTATEID;
1872 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp);
1875 * For NFSv4.1 and NFSv4.2 allow an
1876 * open_to_lock_owner when the lock_owner already
1877 * exists. Just clear NFSLCK_OPENTOLOCK so that
1878 * a new lock_owner will not be created.
1879 * RFC7530 states that the error for NFSv4.0
1880 * is NFS4ERR_BAD_SEQID.
1882 if ((nd->nd_flag & ND_NFSV41) != 0)
1883 new_stp->ls_flags &= ~NFSLCK_OPENTOLOCK;
1885 error = NFSERR_BADSEQID;
1888 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) {
1890 * If haslock set, ditto above.
1893 if (stp->ls_flags & NFSLCK_OPEN)
1894 error = NFSERR_BADSTATEID;
1896 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
1897 stp, new_stp->ls_op);
1905 * If the seqid part of the stateid isn't the same, return
1906 * NFSERR_OLDSTATEID for cases other than I/O Ops.
1907 * For I/O Ops, only return NFSERR_OLDSTATEID if
1908 * nfsrv_returnoldstateid is set. (The consensus on the email
1909 * list was that most clients would prefer to not receive
1910 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that
1911 * is what will happen, so I use the nfsrv_returnoldstateid to
1912 * allow for either server configuration.)
1914 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid &&
1915 (((nd->nd_flag & ND_NFSV41) == 0 &&
1916 (!(new_stp->ls_flags & NFSLCK_CHECK) ||
1917 nfsrv_returnoldstateid)) ||
1918 ((nd->nd_flag & ND_NFSV41) != 0 &&
1919 new_stp->ls_stateid.seqid != 0)))
1920 error = NFSERR_OLDSTATEID;
1925 * Now we can check for grace.
1928 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
1929 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
1930 nfsrv_checkstable(clp))
1931 error = NFSERR_NOGRACE;
1933 * If we successfully Reclaimed state, note that.
1935 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error)
1936 nfsrv_markstable(clp);
1939 * At this point, either error == NFSERR_BADSTATEID or the
1940 * seqid# has been updated, so we can return any error.
1941 * If error == 0, there may be an error in:
1942 * nd_repstat - Set by the calling function.
1943 * reterr - Set above, if getting the nfslockfile structure
1944 * or acquiring the local lock failed.
1945 * (If both of these are set, nd_repstat should probably be
1946 * returned, since that error was detected before this
1949 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) {
1951 if (nd->nd_repstat != 0)
1952 error = nd->nd_repstat;
1956 if (filestruct_locked != 0) {
1957 /* Roll back local locks. */
1959 if (vnode_unlocked == 0) {
1960 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2");
1964 nfsrv_locallock_rollback(vp, lfp, p);
1966 nfsrv_unlocklf(lfp);
1973 * Check the nfsrv_getlockfile return.
1974 * Returned -1 if no structure found.
1976 if (getlckret == -1) {
1977 error = NFSERR_EXPIRED;
1979 * Called from lockt, so no lock is OK.
1981 if (new_stp->ls_flags & NFSLCK_TEST) {
1983 } else if (new_stp->ls_flags &
1984 (NFSLCK_CHECK | NFSLCK_SETATTR)) {
1986 * Called to check for a lock, OK if the stateid is all
1987 * 1s or all 0s, but there should be an nfsstate
1989 * (ie. If there is no open, I'll assume no share
1995 error = NFSERR_BADSTATEID;
2002 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict.
2003 * For NFSLCK_CHECK, allow a read if write access is granted,
2004 * but check for a deny. For NFSLCK_LOCK, require correct access,
2005 * which implies a conflicting deny can't exist.
2007 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) {
2009 * Four kinds of state id:
2010 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK
2011 * - stateid for an open
2012 * - stateid for a delegation
2013 * - stateid for a lock owner
2016 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
2019 nfsrv_delaydelegtimeout(stp);
2020 } else if (stp->ls_flags & NFSLCK_OPEN) {
2023 mystp = stp->ls_openstp;
2026 * If locking or checking, require correct access
2029 if (((new_stp->ls_flags & NFSLCK_LOCK) &&
2030 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) &
2031 mystp->ls_flags & NFSLCK_ACCESSBITS)) ||
2032 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) ==
2033 (NFSLCK_CHECK | NFSLCK_READACCESS) &&
2034 !(mystp->ls_flags & NFSLCK_READACCESS) &&
2035 nfsrv_allowreadforwriteopen == 0) ||
2036 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) ==
2037 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) &&
2038 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) {
2039 if (filestruct_locked != 0) {
2040 /* Roll back local locks. */
2042 if (vnode_unlocked == 0) {
2043 ASSERT_VOP_ELOCKED(vp,
2048 nfsrv_locallock_rollback(vp, lfp, p);
2050 nfsrv_unlocklf(lfp);
2053 error = NFSERR_OPENMODE;
2058 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) {
2060 * Check for a conflicting deny bit.
2062 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) {
2063 if (tstp != mystp) {
2064 bits = tstp->ls_flags;
2065 bits >>= NFSLCK_SHIFT;
2066 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) {
2067 KASSERT(vnode_unlocked == 0,
2068 ("nfsrv_lockctrl: vnode unlocked1"));
2069 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock,
2073 * nfsrv_clientconflict unlocks state
2074 * when it returns non-zero.
2082 error = NFSERR_PERM;
2084 error = NFSERR_OPENMODE;
2090 /* We're outta here */
2097 * For setattr, just get rid of all the Delegations for other clients.
2099 if (new_stp->ls_flags & NFSLCK_SETATTR) {
2100 KASSERT(vnode_unlocked == 0,
2101 ("nfsrv_lockctrl: vnode unlocked2"));
2102 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p);
2105 * nfsrv_cleandeleg() unlocks state when it
2115 if (!(new_stp->ls_flags & NFSLCK_CHECK) ||
2116 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) &&
2117 LIST_EMPTY(&lfp->lf_deleg))) {
2124 * Check for a conflicting delegation. If one is found, call
2125 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
2126 * been set yet, it will get the lock. Otherwise, it will recall
2127 * the delegation. Then, we try try again...
2128 * I currently believe the conflict algorithm to be:
2129 * For Lock Ops (Lock/LockT/LockU)
2130 * - there is a conflict iff a different client has a write delegation
2131 * For Reading (Read Op)
2132 * - there is a conflict iff a different client has a write delegation
2133 * (the specialids are always a different client)
2134 * For Writing (Write/Setattr of size)
2135 * - there is a conflict if a different client has any delegation
2136 * - there is a conflict if the same client has a read delegation
2137 * (I don't understand why this isn't allowed, but that seems to be
2138 * the current consensus?)
2140 tstp = LIST_FIRST(&lfp->lf_deleg);
2141 while (tstp != LIST_END(&lfp->lf_deleg)) {
2142 nstp = LIST_NEXT(tstp, ls_file);
2143 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))||
2144 ((new_stp->ls_flags & NFSLCK_CHECK) &&
2145 (new_lop->lo_flags & NFSLCK_READ))) &&
2146 clp != tstp->ls_clp &&
2147 (tstp->ls_flags & NFSLCK_DELEGWRITE)) ||
2148 ((new_stp->ls_flags & NFSLCK_CHECK) &&
2149 (new_lop->lo_flags & NFSLCK_WRITE) &&
2150 (clp != tstp->ls_clp ||
2151 (tstp->ls_flags & NFSLCK_DELEGREAD)))) {
2153 if (filestruct_locked != 0) {
2154 /* Roll back local locks. */
2156 if (vnode_unlocked == 0) {
2157 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4");
2160 nfsrv_locallock_rollback(vp, lfp, p);
2162 nfsrv_unlocklf(lfp);
2164 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2166 if (VN_IS_DOOMED(vp))
2167 ret = NFSERR_SERVERFAULT;
2171 ret = nfsrv_delegconflict(tstp, &haslock, p, vp);
2174 * nfsrv_delegconflict unlocks state when it
2175 * returns non-zero, which it always does.
2178 free(other_lop, M_NFSDLOCK);
2188 /* Never gets here. */
2194 * Handle the unlock case by calling nfsrv_updatelock().
2195 * (Should I have done some access checking above for unlock? For now,
2196 * just let it happen.)
2198 if (new_stp->ls_flags & NFSLCK_UNLOCK) {
2199 first = new_lop->lo_first;
2200 end = new_lop->lo_end;
2201 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp);
2202 stateidp->seqid = ++(stp->ls_stateid.seqid);
2203 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
2204 stateidp->seqid = stp->ls_stateid.seqid = 1;
2205 stateidp->other[0] = stp->ls_stateid.other[0];
2206 stateidp->other[1] = stp->ls_stateid.other[1];
2207 stateidp->other[2] = stp->ls_stateid.other[2];
2208 if (filestruct_locked != 0) {
2210 if (vnode_unlocked == 0) {
2211 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5");
2215 /* Update the local locks. */
2216 nfsrv_localunlock(vp, lfp, first, end, p);
2218 nfsrv_unlocklf(lfp);
2225 * Search for a conflicting lock. A lock conflicts if:
2226 * - the lock range overlaps and
2227 * - at least one lock is a write lock and
2228 * - it is not owned by the same lock owner
2231 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
2232 if (new_lop->lo_end > lop->lo_first &&
2233 new_lop->lo_first < lop->lo_end &&
2234 (new_lop->lo_flags == NFSLCK_WRITE ||
2235 lop->lo_flags == NFSLCK_WRITE) &&
2236 lckstp != lop->lo_stp &&
2237 (clp != lop->lo_stp->ls_clp ||
2238 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen ||
2239 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner,
2240 lckstp->ls_ownerlen))) {
2242 free(other_lop, M_NFSDLOCK);
2245 if (vnode_unlocked != 0)
2246 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
2249 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
2252 if (filestruct_locked != 0) {
2253 if (vnode_unlocked == 0) {
2254 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6");
2257 /* Roll back local locks. */
2258 nfsrv_locallock_rollback(vp, lfp, p);
2260 nfsrv_unlocklf(lfp);
2262 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2264 if (VN_IS_DOOMED(vp)) {
2265 error = NFSERR_SERVERFAULT;
2270 * nfsrv_clientconflict() unlocks state when it
2277 * Found a conflicting lock, so record the conflict and
2280 if (cfp != NULL && ret == 0) {
2281 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0];
2282 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1];
2283 cfp->cl_first = lop->lo_first;
2284 cfp->cl_end = lop->lo_end;
2285 cfp->cl_flags = lop->lo_flags;
2286 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen;
2287 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner,
2291 error = NFSERR_PERM;
2292 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2293 error = NFSERR_RECLAIMCONFLICT;
2294 else if (new_stp->ls_flags & NFSLCK_CHECK)
2295 error = NFSERR_LOCKED;
2297 error = NFSERR_DENIED;
2298 if (filestruct_locked != 0 && ret == 0) {
2299 /* Roll back local locks. */
2301 if (vnode_unlocked == 0) {
2302 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7");
2306 nfsrv_locallock_rollback(vp, lfp, p);
2308 nfsrv_unlocklf(lfp);
2318 * We only get here if there was no lock that conflicted.
2320 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) {
2326 * We only get here when we are creating or modifying a lock.
2327 * There are two variants:
2328 * - exist_lock_owner where lock_owner exists
2329 * - open_to_lock_owner with new lock_owner
2331 first = new_lop->lo_first;
2332 end = new_lop->lo_end;
2333 lock_flags = new_lop->lo_flags;
2334 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) {
2335 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp);
2336 stateidp->seqid = ++(lckstp->ls_stateid.seqid);
2337 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
2338 stateidp->seqid = lckstp->ls_stateid.seqid = 1;
2339 stateidp->other[0] = lckstp->ls_stateid.other[0];
2340 stateidp->other[1] = lckstp->ls_stateid.other[1];
2341 stateidp->other[2] = lckstp->ls_stateid.other[2];
2344 * The new open_to_lock_owner case.
2345 * Link the new nfsstate into the lists.
2347 new_stp->ls_seq = new_stp->ls_opentolockseq;
2348 nfsrvd_refcache(new_stp->ls_op);
2349 stateidp->seqid = new_stp->ls_stateid.seqid = 1;
2350 stateidp->other[0] = new_stp->ls_stateid.other[0] =
2351 clp->lc_clientid.lval[0];
2352 stateidp->other[1] = new_stp->ls_stateid.other[1] =
2353 clp->lc_clientid.lval[1];
2354 stateidp->other[2] = new_stp->ls_stateid.other[2] =
2355 nfsrv_nextstateindex(clp);
2356 new_stp->ls_clp = clp;
2357 LIST_INIT(&new_stp->ls_lock);
2358 new_stp->ls_openstp = stp;
2359 new_stp->ls_lfp = lfp;
2360 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp,
2362 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid),
2364 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list);
2367 nfsstatsv1.srvlockowners++;
2368 nfsrv_openpluslock++;
2370 if (filestruct_locked != 0) {
2372 nfsrv_locallock_commit(lfp, lock_flags, first, end);
2374 nfsrv_unlocklf(lfp);
2380 NFSLOCKV4ROOTMUTEX();
2381 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2382 NFSUNLOCKV4ROOTMUTEX();
2384 if (vnode_unlocked != 0) {
2385 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2386 if (error == 0 && VN_IS_DOOMED(vp))
2387 error = NFSERR_SERVERFAULT;
2390 free(other_lop, M_NFSDLOCK);
2391 NFSEXITCODE2(error, nd);
2396 * Check for state errors for Open.
2397 * repstat is passed back out as an error if more critical errors
2401 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp,
2402 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd,
2403 NFSPROC_T *p, int repstat)
2405 struct nfsstate *stp, *nstp;
2406 struct nfsclient *clp;
2407 struct nfsstate *ownerstp;
2408 struct nfslockfile *lfp, *new_lfp;
2409 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0;
2411 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
2414 * Check for restart conditions (client and server).
2416 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
2417 &new_stp->ls_stateid, 0);
2422 * Check for state resource limit exceeded.
2423 * Technically this should be SMP protected, but the worst
2424 * case error is "out by one or two" on the count when it
2425 * returns NFSERR_RESOURCE and the limit is just a rather
2426 * arbitrary high water mark, so no harm is done.
2428 if (nfsrv_openpluslock > nfsrv_v4statelimit) {
2429 error = NFSERR_RESOURCE;
2434 new_lfp = malloc(sizeof (struct nfslockfile),
2435 M_NFSDLOCKFILE, M_WAITOK);
2437 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
2441 * Get the nfsclient structure.
2443 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
2444 (nfsquad_t)((u_quad_t)0), 0, nd, p);
2447 * Look up the open owner. See if it needs confirmation and
2448 * check the seq#, as required.
2451 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
2453 if (!error && ownerstp) {
2454 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp,
2457 * If the OpenOwner hasn't been confirmed, assume the
2458 * old one was a replay and this one is ok.
2459 * See: RFC3530 Sec. 14.2.18.
2461 if (error == NFSERR_BADSEQID &&
2462 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM))
2470 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
2471 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
2472 nfsrv_checkstable(clp))
2473 error = NFSERR_NOGRACE;
2476 * If none of the above errors occurred, let repstat be
2479 if (repstat && !error)
2484 NFSLOCKV4ROOTMUTEX();
2485 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2486 NFSUNLOCKV4ROOTMUTEX();
2488 free(new_lfp, M_NFSDLOCKFILE);
2493 * If vp == NULL, the file doesn't exist yet, so return ok.
2494 * (This always happens on the first pass, so haslock must be 0.)
2498 free(new_lfp, M_NFSDLOCKFILE);
2503 * Get the structure for the underlying file.
2508 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
2511 free(new_lfp, M_NFSDLOCKFILE);
2515 NFSLOCKV4ROOTMUTEX();
2516 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2517 NFSUNLOCKV4ROOTMUTEX();
2523 * Search for a conflicting open/share.
2525 if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
2527 * For Delegate_Cur, search for the matching Delegation,
2528 * which indicates no conflict.
2529 * An old delegation should have been recovered by the
2530 * client doing a Claim_DELEGATE_Prev, so I won't let
2531 * it match and return NFSERR_EXPIRED. Should I let it
2534 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
2535 if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
2536 (((nd->nd_flag & ND_NFSV41) != 0 &&
2537 stateidp->seqid == 0) ||
2538 stateidp->seqid == stp->ls_stateid.seqid) &&
2539 !NFSBCMP(stateidp->other, stp->ls_stateid.other,
2543 if (stp == LIST_END(&lfp->lf_deleg) ||
2544 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
2545 (stp->ls_flags & NFSLCK_DELEGREAD))) {
2548 NFSLOCKV4ROOTMUTEX();
2549 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2550 NFSUNLOCKV4ROOTMUTEX();
2552 error = NFSERR_EXPIRED;
2558 * Check for access/deny bit conflicts. I check for the same
2559 * owner as well, in case the client didn't bother.
2561 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
2562 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) &&
2563 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
2564 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
2565 ((stp->ls_flags & NFSLCK_ACCESSBITS) &
2566 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){
2567 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
2570 * nfsrv_clientconflict() unlocks
2571 * state when it returns non-zero.
2576 error = NFSERR_PERM;
2577 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2578 error = NFSERR_RECLAIMCONFLICT;
2580 error = NFSERR_SHAREDENIED;
2584 NFSLOCKV4ROOTMUTEX();
2585 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2586 NFSUNLOCKV4ROOTMUTEX();
2593 * Check for a conflicting delegation. If one is found, call
2594 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
2595 * been set yet, it will get the lock. Otherwise, it will recall
2596 * the delegation. Then, we try try again...
2597 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there
2598 * isn't a conflict.)
2599 * I currently believe the conflict algorithm to be:
2600 * For Open with Read Access and Deny None
2601 * - there is a conflict iff a different client has a write delegation
2602 * For Open with other Write Access or any Deny except None
2603 * - there is a conflict if a different client has any delegation
2604 * - there is a conflict if the same client has a read delegation
2605 * (The current consensus is that this last case should be
2606 * considered a conflict since the client with a read delegation
2607 * could have done an Open with ReadAccess and WriteDeny
2608 * locally and then not have checked for the WriteDeny.)
2609 * Don't check for a Reclaim, since that will be dealt with
2610 * by nfsrv_openctrl().
2612 if (!(new_stp->ls_flags &
2613 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) {
2614 stp = LIST_FIRST(&lfp->lf_deleg);
2615 while (stp != LIST_END(&lfp->lf_deleg)) {
2616 nstp = LIST_NEXT(stp, ls_file);
2617 if ((readonly && stp->ls_clp != clp &&
2618 (stp->ls_flags & NFSLCK_DELEGWRITE)) ||
2619 (!readonly && (stp->ls_clp != clp ||
2620 (stp->ls_flags & NFSLCK_DELEGREAD)))) {
2621 ret = nfsrv_delegconflict(stp, &haslock, p, vp);
2624 * nfsrv_delegconflict() unlocks state
2625 * when it returns non-zero.
2638 NFSLOCKV4ROOTMUTEX();
2639 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2640 NFSUNLOCKV4ROOTMUTEX();
2644 NFSEXITCODE2(error, nd);
2649 * Open control function to create/update open state for an open.
2652 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp,
2653 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp,
2654 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp,
2655 NFSPROC_T *p, u_quad_t filerev)
2657 struct nfsstate *new_stp = *new_stpp;
2658 struct nfsstate *stp, *nstp;
2659 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg;
2660 struct nfslockfile *lfp, *new_lfp;
2661 struct nfsclient *clp;
2662 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1;
2663 int readonly = 0, cbret = 1, getfhret = 0;
2664 int gotstate = 0, len = 0;
2665 u_char *clidp = NULL;
2667 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
2670 * Check for restart conditions (client and server).
2671 * (Paranoia, should have been detected by nfsrv_opencheck().)
2672 * If an error does show up, return NFSERR_EXPIRED, since the
2673 * the seqid# has already been incremented.
2675 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
2676 &new_stp->ls_stateid, 0);
2678 printf("Nfsd: openctrl unexpected restart err=%d\n",
2680 error = NFSERR_EXPIRED;
2684 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
2686 new_lfp = malloc(sizeof (struct nfslockfile),
2687 M_NFSDLOCKFILE, M_WAITOK);
2688 new_open = malloc(sizeof (struct nfsstate),
2689 M_NFSDSTATE, M_WAITOK);
2690 new_deleg = malloc(sizeof (struct nfsstate),
2691 M_NFSDSTATE, M_WAITOK);
2692 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
2696 * Get the client structure. Since the linked lists could be changed
2697 * by other nfsd processes if this process does a tsleep(), one of
2698 * two things must be done.
2699 * 1 - don't tsleep()
2701 * 2 - get the nfsv4_lock() { indicated by haslock == 1 }
2702 * before using the lists, since this lock stops the other
2703 * nfsd. This should only be used for rare cases, since it
2704 * essentially single threads the nfsd.
2705 * At this time, it is only done for cases where the stable
2706 * storage file must be written prior to completion of state
2709 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
2710 (nfsquad_t)((u_quad_t)0), 0, nd, p);
2711 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) &&
2714 * This happens on the first open for a client
2715 * that supports callbacks.
2719 * Although nfsrv_docallback() will sleep, clp won't
2720 * go away, since they are only removed when the
2721 * nfsv4_lock() has blocked the nfsd threads. The
2722 * fields in clp can change, but having multiple
2723 * threads do this Null callback RPC should be
2726 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL,
2727 NULL, 0, NULL, NULL, NULL, 0, p);
2729 clp->lc_flags &= ~LCL_NEEDSCBNULL;
2731 clp->lc_flags |= LCL_CALLBACKSON;
2735 * Look up the open owner. See if it needs confirmation and
2736 * check the seq#, as required.
2739 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
2743 printf("Nfsd: openctrl unexpected state err=%d\n",
2745 free(new_lfp, M_NFSDLOCKFILE);
2746 free(new_open, M_NFSDSTATE);
2747 free(new_deleg, M_NFSDSTATE);
2749 NFSLOCKV4ROOTMUTEX();
2750 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2751 NFSUNLOCKV4ROOTMUTEX();
2753 error = NFSERR_EXPIRED;
2757 if (new_stp->ls_flags & NFSLCK_RECLAIM)
2758 nfsrv_markstable(clp);
2761 * Get the structure for the underlying file.
2766 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
2769 free(new_lfp, M_NFSDLOCKFILE);
2772 printf("Nfsd openctrl unexpected getlockfile err=%d\n",
2774 free(new_open, M_NFSDSTATE);
2775 free(new_deleg, M_NFSDSTATE);
2777 NFSLOCKV4ROOTMUTEX();
2778 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2779 NFSUNLOCKV4ROOTMUTEX();
2785 * Search for a conflicting open/share.
2787 if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
2789 * For Delegate_Cur, search for the matching Delegation,
2790 * which indicates no conflict.
2791 * An old delegation should have been recovered by the
2792 * client doing a Claim_DELEGATE_Prev, so I won't let
2793 * it match and return NFSERR_EXPIRED. Should I let it
2796 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
2797 if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
2798 (((nd->nd_flag & ND_NFSV41) != 0 &&
2799 stateidp->seqid == 0) ||
2800 stateidp->seqid == stp->ls_stateid.seqid) &&
2801 !NFSBCMP(stateidp->other, stp->ls_stateid.other,
2805 if (stp == LIST_END(&lfp->lf_deleg) ||
2806 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
2807 (stp->ls_flags & NFSLCK_DELEGREAD))) {
2809 printf("Nfsd openctrl unexpected expiry\n");
2810 free(new_open, M_NFSDSTATE);
2811 free(new_deleg, M_NFSDSTATE);
2813 NFSLOCKV4ROOTMUTEX();
2814 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2815 NFSUNLOCKV4ROOTMUTEX();
2817 error = NFSERR_EXPIRED;
2822 * Don't issue a Delegation, since one already exists and
2823 * delay delegation timeout, as required.
2826 nfsrv_delaydelegtimeout(stp);
2830 * Check for access/deny bit conflicts. I also check for the
2831 * same owner, since the client might not have bothered to check.
2832 * Also, note an open for the same file and owner, if found,
2833 * which is all we do here for Delegate_Cur, since conflict
2834 * checking is already done.
2836 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
2837 if (ownerstp && stp->ls_openowner == ownerstp)
2839 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) {
2841 * If another client has the file open, the only
2842 * delegation that can be issued is a Read delegation
2843 * and only if it is a Read open with Deny none.
2845 if (clp != stp->ls_clp) {
2846 if ((stp->ls_flags & NFSLCK_SHAREBITS) ==
2852 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
2853 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
2854 ((stp->ls_flags & NFSLCK_ACCESSBITS) &
2855 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){
2856 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
2859 * nfsrv_clientconflict() unlocks state
2860 * when it returns non-zero.
2862 free(new_open, M_NFSDSTATE);
2863 free(new_deleg, M_NFSDSTATE);
2868 error = NFSERR_PERM;
2869 else if (new_stp->ls_flags & NFSLCK_RECLAIM)
2870 error = NFSERR_RECLAIMCONFLICT;
2872 error = NFSERR_SHAREDENIED;
2876 NFSLOCKV4ROOTMUTEX();
2877 nfsv4_unlock(&nfsv4rootfs_lock, 1);
2878 NFSUNLOCKV4ROOTMUTEX();
2880 free(new_open, M_NFSDSTATE);
2881 free(new_deleg, M_NFSDSTATE);
2882 printf("nfsd openctrl unexpected client cnfl\n");
2889 * Check for a conflicting delegation. If one is found, call
2890 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't
2891 * been set yet, it will get the lock. Otherwise, it will recall
2892 * the delegation. Then, we try try again...
2893 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there
2894 * isn't a conflict.)
2895 * I currently believe the conflict algorithm to be:
2896 * For Open with Read Access and Deny None
2897 * - there is a conflict iff a different client has a write delegation
2898 * For Open with other Write Access or any Deny except None
2899 * - there is a conflict if a different client has any delegation
2900 * - there is a conflict if the same client has a read delegation
2901 * (The current consensus is that this last case should be
2902 * considered a conflict since the client with a read delegation
2903 * could have done an Open with ReadAccess and WriteDeny
2904 * locally and then not have checked for the WriteDeny.)
2906 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) {
2907 stp = LIST_FIRST(&lfp->lf_deleg);
2908 while (stp != LIST_END(&lfp->lf_deleg)) {
2909 nstp = LIST_NEXT(stp, ls_file);
2910 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD))
2914 if ((readonly && stp->ls_clp != clp &&
2915 (stp->ls_flags & NFSLCK_DELEGWRITE)) ||
2916 (!readonly && (stp->ls_clp != clp ||
2917 (stp->ls_flags & NFSLCK_DELEGREAD)))) {
2918 if (new_stp->ls_flags & NFSLCK_RECLAIM) {
2921 ret = nfsrv_delegconflict(stp, &haslock, p, vp);
2924 * nfsrv_delegconflict() unlocks state
2925 * when it returns non-zero.
2927 printf("Nfsd openctrl unexpected deleg cnfl\n");
2928 free(new_open, M_NFSDSTATE);
2929 free(new_deleg, M_NFSDSTATE);
2944 * We only get here if there was no open that conflicted.
2945 * If an open for the owner exists, or in the access/deny bits.
2946 * Otherwise it is a new open. If the open_owner hasn't been
2947 * confirmed, replace the open with the new one needing confirmation,
2948 * otherwise add the open.
2950 if (new_stp->ls_flags & NFSLCK_DELEGPREV) {
2952 * Handle NFSLCK_DELEGPREV by searching the old delegations for
2953 * a match. If found, just move the old delegation to the current
2954 * delegation list and issue open. If not found, return
2957 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
2958 if (stp->ls_lfp == lfp) {
2960 if (stp->ls_clp != clp)
2961 panic("olddeleg clp");
2962 LIST_REMOVE(stp, ls_list);
2963 LIST_REMOVE(stp, ls_hash);
2964 stp->ls_flags &= ~NFSLCK_OLDDELEG;
2965 stp->ls_stateid.seqid = delegstateidp->seqid = 1;
2966 stp->ls_stateid.other[0] = delegstateidp->other[0] =
2967 clp->lc_clientid.lval[0];
2968 stp->ls_stateid.other[1] = delegstateidp->other[1] =
2969 clp->lc_clientid.lval[1];
2970 stp->ls_stateid.other[2] = delegstateidp->other[2] =
2971 nfsrv_nextstateindex(clp);
2972 stp->ls_compref = nd->nd_compref;
2973 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list);
2974 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
2975 stp->ls_stateid), stp, ls_hash);
2976 if (stp->ls_flags & NFSLCK_DELEGWRITE)
2977 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
2979 *rflagsp |= NFSV4OPEN_READDELEGATE;
2980 clp->lc_delegtime = NFSD_MONOSEC +
2981 nfsrv_lease + NFSRV_LEASEDELTA;
2984 * Now, do the associated open.
2986 new_open->ls_stateid.seqid = 1;
2987 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
2988 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
2989 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
2990 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)|
2992 if (stp->ls_flags & NFSLCK_DELEGWRITE)
2993 new_open->ls_flags |= (NFSLCK_READACCESS |
2994 NFSLCK_WRITEACCESS);
2996 new_open->ls_flags |= NFSLCK_READACCESS;
2997 new_open->ls_uid = new_stp->ls_uid;
2998 new_open->ls_lfp = lfp;
2999 new_open->ls_clp = clp;
3000 LIST_INIT(&new_open->ls_open);
3001 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3002 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3005 * and handle the open owner
3008 new_open->ls_openowner = ownerstp;
3009 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list);
3011 new_open->ls_openowner = new_stp;
3012 new_stp->ls_flags = 0;
3013 nfsrvd_refcache(new_stp->ls_op);
3014 new_stp->ls_noopens = 0;
3015 LIST_INIT(&new_stp->ls_open);
3016 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
3017 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
3019 nfsstatsv1.srvopenowners++;
3020 nfsrv_openpluslock++;
3024 nfsstatsv1.srvopens++;
3025 nfsrv_openpluslock++;
3029 if (stp == LIST_END(&clp->lc_olddeleg))
3030 error = NFSERR_EXPIRED;
3031 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
3033 * Scan to see that no delegation for this client and file
3034 * doesn't already exist.
3035 * There also shouldn't yet be an Open for this file and
3038 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
3039 if (stp->ls_clp == clp)
3042 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) {
3044 * This is the Claim_Previous case with a delegation
3045 * type != Delegate_None.
3048 * First, add the delegation. (Although we must issue the
3049 * delegation, we can also ask for an immediate return.)
3051 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
3052 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] =
3053 clp->lc_clientid.lval[0];
3054 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] =
3055 clp->lc_clientid.lval[1];
3056 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] =
3057 nfsrv_nextstateindex(clp);
3058 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) {
3059 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
3060 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
3061 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3062 nfsrv_writedelegcnt++;
3064 new_deleg->ls_flags = (NFSLCK_DELEGREAD |
3066 *rflagsp |= NFSV4OPEN_READDELEGATE;
3068 new_deleg->ls_uid = new_stp->ls_uid;
3069 new_deleg->ls_lfp = lfp;
3070 new_deleg->ls_clp = clp;
3071 new_deleg->ls_filerev = filerev;
3072 new_deleg->ls_compref = nd->nd_compref;
3073 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
3074 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3075 new_deleg->ls_stateid), new_deleg, ls_hash);
3076 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
3078 if (delegate == 2 || nfsrv_issuedelegs == 0 ||
3079 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
3081 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) ||
3082 !NFSVNO_DELEGOK(vp))
3083 *rflagsp |= NFSV4OPEN_RECALL;
3084 nfsstatsv1.srvdelegates++;
3085 nfsrv_openpluslock++;
3086 nfsrv_delegatecnt++;
3089 * Now, do the associated open.
3091 new_open->ls_stateid.seqid = 1;
3092 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
3093 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
3094 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
3095 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) |
3097 if (new_stp->ls_flags & NFSLCK_DELEGWRITE)
3098 new_open->ls_flags |= (NFSLCK_READACCESS |
3099 NFSLCK_WRITEACCESS);
3101 new_open->ls_flags |= NFSLCK_READACCESS;
3102 new_open->ls_uid = new_stp->ls_uid;
3103 new_open->ls_lfp = lfp;
3104 new_open->ls_clp = clp;
3105 LIST_INIT(&new_open->ls_open);
3106 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3107 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3110 * and handle the open owner
3113 new_open->ls_openowner = ownerstp;
3114 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
3116 new_open->ls_openowner = new_stp;
3117 new_stp->ls_flags = 0;
3118 nfsrvd_refcache(new_stp->ls_op);
3119 new_stp->ls_noopens = 0;
3120 LIST_INIT(&new_stp->ls_open);
3121 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
3122 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
3124 nfsstatsv1.srvopenowners++;
3125 nfsrv_openpluslock++;
3129 nfsstatsv1.srvopens++;
3130 nfsrv_openpluslock++;
3132 error = NFSERR_RECLAIMCONFLICT;
3134 } else if (ownerstp) {
3135 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) {
3136 /* Replace the open */
3137 if (ownerstp->ls_op)
3138 nfsrvd_derefcache(ownerstp->ls_op);
3139 ownerstp->ls_op = new_stp->ls_op;
3140 nfsrvd_refcache(ownerstp->ls_op);
3141 ownerstp->ls_seq = new_stp->ls_seq;
3142 *rflagsp |= NFSV4OPEN_RESULTCONFIRM;
3143 stp = LIST_FIRST(&ownerstp->ls_open);
3144 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
3146 stp->ls_stateid.seqid = 1;
3147 stp->ls_uid = new_stp->ls_uid;
3148 if (lfp != stp->ls_lfp) {
3149 LIST_REMOVE(stp, ls_file);
3150 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file);
3154 } else if (openstp) {
3155 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS);
3156 openstp->ls_stateid.seqid++;
3157 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3158 openstp->ls_stateid.seqid == 0)
3159 openstp->ls_stateid.seqid = 1;
3162 * This is where we can choose to issue a delegation.
3164 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
3165 *rflagsp |= NFSV4OPEN_WDNOTWANTED;
3166 else if (nfsrv_issuedelegs == 0)
3167 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE;
3168 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
3169 *rflagsp |= NFSV4OPEN_WDRESOURCE;
3170 else if (delegate == 0 || writedeleg == 0 ||
3171 NFSVNO_EXRDONLY(exp) || (readonly != 0 &&
3172 nfsrv_writedelegifpos == 0) ||
3173 !NFSVNO_DELEGOK(vp) ||
3174 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 ||
3175 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
3177 *rflagsp |= NFSV4OPEN_WDCONTENTION;
3179 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
3180 new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
3181 = clp->lc_clientid.lval[0];
3182 new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
3183 = clp->lc_clientid.lval[1];
3184 new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
3185 = nfsrv_nextstateindex(clp);
3186 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
3187 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
3188 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3189 new_deleg->ls_uid = new_stp->ls_uid;
3190 new_deleg->ls_lfp = lfp;
3191 new_deleg->ls_clp = clp;
3192 new_deleg->ls_filerev = filerev;
3193 new_deleg->ls_compref = nd->nd_compref;
3194 nfsrv_writedelegcnt++;
3195 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
3196 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3197 new_deleg->ls_stateid), new_deleg, ls_hash);
3198 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
3200 nfsstatsv1.srvdelegates++;
3201 nfsrv_openpluslock++;
3202 nfsrv_delegatecnt++;
3205 new_open->ls_stateid.seqid = 1;
3206 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
3207 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
3208 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
3209 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)|
3211 new_open->ls_uid = new_stp->ls_uid;
3212 new_open->ls_openowner = ownerstp;
3213 new_open->ls_lfp = lfp;
3214 new_open->ls_clp = clp;
3215 LIST_INIT(&new_open->ls_open);
3216 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3217 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
3218 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3222 nfsstatsv1.srvopens++;
3223 nfsrv_openpluslock++;
3226 * This is where we can choose to issue a delegation.
3228 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
3229 *rflagsp |= NFSV4OPEN_WDNOTWANTED;
3230 else if (nfsrv_issuedelegs == 0)
3231 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE;
3232 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
3233 *rflagsp |= NFSV4OPEN_WDRESOURCE;
3234 else if (delegate == 0 || (writedeleg == 0 &&
3235 readonly == 0) || !NFSVNO_DELEGOK(vp) ||
3236 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
3238 *rflagsp |= NFSV4OPEN_WDCONTENTION;
3240 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
3241 new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
3242 = clp->lc_clientid.lval[0];
3243 new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
3244 = clp->lc_clientid.lval[1];
3245 new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
3246 = nfsrv_nextstateindex(clp);
3247 if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
3248 (nfsrv_writedelegifpos || !readonly) &&
3249 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) {
3250 new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
3251 NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
3252 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3253 nfsrv_writedelegcnt++;
3255 new_deleg->ls_flags = (NFSLCK_DELEGREAD |
3257 *rflagsp |= NFSV4OPEN_READDELEGATE;
3259 new_deleg->ls_uid = new_stp->ls_uid;
3260 new_deleg->ls_lfp = lfp;
3261 new_deleg->ls_clp = clp;
3262 new_deleg->ls_filerev = filerev;
3263 new_deleg->ls_compref = nd->nd_compref;
3264 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
3265 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3266 new_deleg->ls_stateid), new_deleg, ls_hash);
3267 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
3269 nfsstatsv1.srvdelegates++;
3270 nfsrv_openpluslock++;
3271 nfsrv_delegatecnt++;
3276 * New owner case. Start the open_owner sequence with a
3277 * Needs confirmation (unless a reclaim) and hang the
3280 new_open->ls_stateid.seqid = 1;
3281 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
3282 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
3283 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
3284 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
3286 new_open->ls_uid = new_stp->ls_uid;
3287 LIST_INIT(&new_open->ls_open);
3288 new_open->ls_openowner = new_stp;
3289 new_open->ls_lfp = lfp;
3290 new_open->ls_clp = clp;
3291 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
3292 if (new_stp->ls_flags & NFSLCK_RECLAIM) {
3293 new_stp->ls_flags = 0;
3294 } else if ((nd->nd_flag & ND_NFSV41) != 0) {
3295 /* NFSv4.1 never needs confirmation. */
3296 new_stp->ls_flags = 0;
3299 * This is where we can choose to issue a delegation.
3301 if (delegate && nfsrv_issuedelegs &&
3302 (writedeleg || readonly) &&
3303 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) ==
3305 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) &&
3306 NFSVNO_DELEGOK(vp) &&
3307 ((nd->nd_flag & ND_NFSV41) == 0 ||
3308 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) {
3309 new_deleg->ls_stateid.seqid =
3310 delegstateidp->seqid = 1;
3311 new_deleg->ls_stateid.other[0] =
3312 delegstateidp->other[0]
3313 = clp->lc_clientid.lval[0];
3314 new_deleg->ls_stateid.other[1] =
3315 delegstateidp->other[1]
3316 = clp->lc_clientid.lval[1];
3317 new_deleg->ls_stateid.other[2] =
3318 delegstateidp->other[2]
3319 = nfsrv_nextstateindex(clp);
3320 if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
3321 (nfsrv_writedelegifpos || !readonly) &&
3322 ((nd->nd_flag & ND_NFSV41) == 0 ||
3323 (new_stp->ls_flags & NFSLCK_WANTRDELEG) ==
3325 new_deleg->ls_flags =
3326 (NFSLCK_DELEGWRITE |
3328 NFSLCK_WRITEACCESS);
3329 *rflagsp |= NFSV4OPEN_WRITEDELEGATE;
3330 nfsrv_writedelegcnt++;
3332 new_deleg->ls_flags =
3335 *rflagsp |= NFSV4OPEN_READDELEGATE;
3337 new_deleg->ls_uid = new_stp->ls_uid;
3338 new_deleg->ls_lfp = lfp;
3339 new_deleg->ls_clp = clp;
3340 new_deleg->ls_filerev = filerev;
3341 new_deleg->ls_compref = nd->nd_compref;
3342 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg,
3344 LIST_INSERT_HEAD(NFSSTATEHASH(clp,
3345 new_deleg->ls_stateid), new_deleg, ls_hash);
3346 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg,
3349 nfsstatsv1.srvdelegates++;
3350 nfsrv_openpluslock++;
3351 nfsrv_delegatecnt++;
3354 * Since NFSv4.1 never does an OpenConfirm, the first
3355 * open state will be acquired here.
3357 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
3358 clp->lc_flags |= LCL_STAMPEDSTABLE;
3359 len = clp->lc_idlen;
3360 NFSBCOPY(clp->lc_id, clidp, len);
3364 *rflagsp |= NFSV4OPEN_RESULTCONFIRM;
3365 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM;
3367 nfsrvd_refcache(new_stp->ls_op);
3368 new_stp->ls_noopens = 0;
3369 LIST_INIT(&new_stp->ls_open);
3370 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
3371 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
3372 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
3377 nfsstatsv1.srvopens++;
3378 nfsrv_openpluslock++;
3379 nfsstatsv1.srvopenowners++;
3380 nfsrv_openpluslock++;
3383 stateidp->seqid = openstp->ls_stateid.seqid;
3384 stateidp->other[0] = openstp->ls_stateid.other[0];
3385 stateidp->other[1] = openstp->ls_stateid.other[1];
3386 stateidp->other[2] = openstp->ls_stateid.other[2];
3390 NFSLOCKV4ROOTMUTEX();
3391 nfsv4_unlock(&nfsv4rootfs_lock, 1);
3392 NFSUNLOCKV4ROOTMUTEX();
3395 free(new_open, M_NFSDSTATE);
3397 free(new_deleg, M_NFSDSTATE);
3400 * If the NFSv4.1 client just acquired its first open, write a timestamp
3401 * to the stable storage file.
3403 if (gotstate != 0) {
3404 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
3405 nfsrv_backupstable();
3409 free(clidp, M_TEMP);
3410 NFSEXITCODE2(error, nd);
3415 * Open update. Does the confirm, downgrade and close.
3418 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid,
3419 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p,
3420 int *retwriteaccessp)
3422 struct nfsstate *stp;
3423 struct nfsclient *clp;
3424 struct nfslockfile *lfp;
3426 int error = 0, gotstate = 0, len = 0;
3427 u_char *clidp = NULL;
3430 * Check for restart conditions (client and server).
3432 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
3433 &new_stp->ls_stateid, 0);
3437 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
3440 * Get the open structure via clientid and stateid.
3442 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3443 (nfsquad_t)((u_quad_t)0), 0, nd, p);
3445 error = nfsrv_getstate(clp, &new_stp->ls_stateid,
3446 new_stp->ls_flags, &stp);
3449 * Sanity check the open.
3451 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) ||
3452 (!(new_stp->ls_flags & NFSLCK_CONFIRM) &&
3453 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) ||
3454 ((new_stp->ls_flags & NFSLCK_CONFIRM) &&
3455 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)))))
3456 error = NFSERR_BADSTATEID;
3459 error = nfsrv_checkseqid(nd, new_stp->ls_seq,
3460 stp->ls_openowner, new_stp->ls_op);
3461 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid &&
3462 (((nd->nd_flag & ND_NFSV41) == 0 &&
3463 !(new_stp->ls_flags & NFSLCK_CONFIRM)) ||
3464 ((nd->nd_flag & ND_NFSV41) != 0 &&
3465 new_stp->ls_stateid.seqid != 0)))
3466 error = NFSERR_OLDSTATEID;
3467 if (!error && vnode_vtype(vp) != VREG) {
3468 if (vnode_vtype(vp) == VDIR)
3469 error = NFSERR_ISDIR;
3471 error = NFSERR_INVAL;
3476 * If a client tries to confirm an Open with a bad
3477 * seqid# and there are no byte range locks or other Opens
3478 * on the openowner, just throw it away, so the next use of the
3479 * openowner will start a fresh seq#.
3481 if (error == NFSERR_BADSEQID &&
3482 (new_stp->ls_flags & NFSLCK_CONFIRM) &&
3483 nfsrv_nootherstate(stp))
3484 nfsrv_freeopenowner(stp->ls_openowner, 0, p);
3490 * Set the return stateid.
3492 stateidp->seqid = stp->ls_stateid.seqid + 1;
3493 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
3494 stateidp->seqid = 1;
3495 stateidp->other[0] = stp->ls_stateid.other[0];
3496 stateidp->other[1] = stp->ls_stateid.other[1];
3497 stateidp->other[2] = stp->ls_stateid.other[2];
3499 * Now, handle the three cases.
3501 if (new_stp->ls_flags & NFSLCK_CONFIRM) {
3503 * If the open doesn't need confirmation, it seems to me that
3504 * there is a client error, but I'll just log it and keep going?
3506 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))
3507 printf("Nfsv4d: stray open confirm\n");
3508 stp->ls_openowner->ls_flags = 0;
3509 stp->ls_stateid.seqid++;
3510 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3511 stp->ls_stateid.seqid == 0)
3512 stp->ls_stateid.seqid = 1;
3513 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
3514 clp->lc_flags |= LCL_STAMPEDSTABLE;
3515 len = clp->lc_idlen;
3516 NFSBCOPY(clp->lc_id, clidp, len);
3520 } else if (new_stp->ls_flags & NFSLCK_CLOSE) {
3522 if (retwriteaccessp != NULL) {
3523 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0)
3524 *retwriteaccessp = 1;
3526 *retwriteaccessp = 0;
3528 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) {
3529 /* Get the lf lock */
3532 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate");
3534 if (nfsrv_freeopen(stp, vp, 1, p) == 0) {
3536 nfsrv_unlocklf(lfp);
3539 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3541 (void) nfsrv_freeopen(stp, NULL, 0, p);
3546 * Update the share bits, making sure that the new set are a
3547 * subset of the old ones.
3549 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS);
3550 if (~(stp->ls_flags) & bits) {
3552 error = NFSERR_INVAL;
3555 stp->ls_flags = (bits | NFSLCK_OPEN);
3556 stp->ls_stateid.seqid++;
3557 if ((nd->nd_flag & ND_NFSV41) != 0 &&
3558 stp->ls_stateid.seqid == 0)
3559 stp->ls_stateid.seqid = 1;
3564 * If the client just confirmed its first open, write a timestamp
3565 * to the stable storage file.
3567 if (gotstate != 0) {
3568 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
3569 nfsrv_backupstable();
3573 free(clidp, M_TEMP);
3574 NFSEXITCODE2(error, nd);
3579 * Delegation update. Does the purge and return.
3582 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid,
3583 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred,
3584 NFSPROC_T *p, int *retwriteaccessp)
3586 struct nfsstate *stp;
3587 struct nfsclient *clp;
3592 * Do a sanity check against the file handle for DelegReturn.
3595 error = nfsvno_getfh(vp, &fh, p);
3600 * Check for restart conditions (client and server).
3602 if (op == NFSV4OP_DELEGRETURN)
3603 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN,
3606 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE,
3611 * Get the open structure via clientid and stateid.
3614 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3615 (nfsquad_t)((u_quad_t)0), 0, nd, p);
3617 if (error == NFSERR_CBPATHDOWN)
3619 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN)
3620 error = NFSERR_STALESTATEID;
3622 if (!error && op == NFSV4OP_DELEGRETURN) {
3623 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp);
3624 if (!error && stp->ls_stateid.seqid != stateidp->seqid &&
3625 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0))
3626 error = NFSERR_OLDSTATEID;
3629 * NFSERR_EXPIRED means that the state has gone away,
3630 * so Delegations have been purged. Just return ok.
3632 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) {
3642 if (op == NFSV4OP_DELEGRETURN) {
3643 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh,
3644 sizeof (fhandle_t))) {
3646 error = NFSERR_BADSTATEID;
3649 if (retwriteaccessp != NULL) {
3650 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0)
3651 *retwriteaccessp = 1;
3653 *retwriteaccessp = 0;
3655 nfsrv_freedeleg(stp);
3657 nfsrv_freedeleglist(&clp->lc_olddeleg);
3668 * Release lock owner.
3671 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid,
3674 struct nfsstate *stp, *nstp, *openstp, *ownstp;
3675 struct nfsclient *clp;
3679 * Check for restart conditions (client and server).
3681 error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
3682 &new_stp->ls_stateid, 0);
3688 * Get the lock owner by name.
3690 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
3691 (nfsquad_t)((u_quad_t)0), 0, NULL, p);
3696 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) {
3697 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) {
3698 stp = LIST_FIRST(&openstp->ls_open);
3699 while (stp != LIST_END(&openstp->ls_open)) {
3700 nstp = LIST_NEXT(stp, ls_list);
3702 * If the owner matches, check for locks and
3703 * then free or return an error.
3705 if (stp->ls_ownerlen == new_stp->ls_ownerlen &&
3706 !NFSBCMP(stp->ls_owner, new_stp->ls_owner,
3708 if (LIST_EMPTY(&stp->ls_lock)) {
3709 nfsrv_freelockowner(stp, NULL, 0, p);
3712 error = NFSERR_LOCKSHELD;
3728 * Get the file handle for a lock structure.
3731 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp,
3732 fhandle_t *nfhp, NFSPROC_T *p)
3734 fhandle_t *fhp = NULL;
3738 * For lock, use the new nfslock structure, otherwise just
3739 * a fhandle_t on the stack.
3741 if (flags & NFSLCK_OPEN) {
3742 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL"));
3743 fhp = &new_lfp->lf_fh;
3747 panic("nfsrv_getlockfh");
3749 error = nfsvno_getfh(vp, fhp, p);
3755 * Get an nfs lock structure. Allocate one, as required, and return a
3757 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock.
3760 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
3761 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit)
3763 struct nfslockfile *lfp;
3764 fhandle_t *fhp = NULL, *tfhp;
3765 struct nfslockhashhead *hp;
3766 struct nfslockfile *new_lfp = NULL;
3769 * For lock, use the new nfslock structure, otherwise just
3770 * a fhandle_t on the stack.
3772 if (flags & NFSLCK_OPEN) {
3773 new_lfp = *new_lfpp;
3774 fhp = &new_lfp->lf_fh;
3778 panic("nfsrv_getlockfile");
3781 hp = NFSLOCKHASH(fhp);
3782 LIST_FOREACH(lfp, hp, lf_hash) {
3784 if (NFSVNO_CMPFH(fhp, tfhp)) {
3791 if (!(flags & NFSLCK_OPEN))
3795 * No match, so chain the new one into the list.
3797 LIST_INIT(&new_lfp->lf_open);
3798 LIST_INIT(&new_lfp->lf_lock);
3799 LIST_INIT(&new_lfp->lf_deleg);
3800 LIST_INIT(&new_lfp->lf_locallock);
3801 LIST_INIT(&new_lfp->lf_rollback);
3802 new_lfp->lf_locallock_lck.nfslock_usecnt = 0;
3803 new_lfp->lf_locallock_lck.nfslock_lock = 0;
3804 new_lfp->lf_usecount = 0;
3805 LIST_INSERT_HEAD(hp, new_lfp, lf_hash);
3812 * This function adds a nfslock lock structure to the list for the associated
3813 * nfsstate and nfslockfile structures. It will be inserted after the
3814 * entry pointed at by insert_lop.
3817 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop,
3818 struct nfsstate *stp, struct nfslockfile *lfp)
3820 struct nfslock *lop, *nlop;
3822 new_lop->lo_stp = stp;
3823 new_lop->lo_lfp = lfp;
3826 /* Insert in increasing lo_first order */
3827 lop = LIST_FIRST(&lfp->lf_lock);
3828 if (lop == LIST_END(&lfp->lf_lock) ||
3829 new_lop->lo_first <= lop->lo_first) {
3830 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile);
3832 nlop = LIST_NEXT(lop, lo_lckfile);
3833 while (nlop != LIST_END(&lfp->lf_lock) &&
3834 nlop->lo_first < new_lop->lo_first) {
3836 nlop = LIST_NEXT(lop, lo_lckfile);
3838 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile);
3841 new_lop->lo_lckfile.le_prev = NULL; /* list not used */
3845 * Insert after insert_lop, which is overloaded as stp or lfp for
3848 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp)
3849 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner);
3850 else if ((struct nfsstate *)insert_lop == stp)
3851 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner);
3853 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner);
3855 nfsstatsv1.srvlocks++;
3856 nfsrv_openpluslock++;
3861 * This function updates the locking for a lock owner and given file. It
3862 * maintains a list of lock ranges ordered on increasing file offset that
3863 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style).
3864 * It always adds new_lop to the list and sometimes uses the one pointed
3868 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
3869 struct nfslock **other_lopp, struct nfslockfile *lfp)
3871 struct nfslock *new_lop = *new_lopp;
3872 struct nfslock *lop, *tlop, *ilop;
3873 struct nfslock *other_lop = *other_lopp;
3874 int unlock = 0, myfile = 0;
3878 * Work down the list until the lock is merged.
3880 if (new_lop->lo_flags & NFSLCK_UNLOCK)
3883 ilop = (struct nfslock *)stp;
3884 lop = LIST_FIRST(&stp->ls_lock);
3886 ilop = (struct nfslock *)lfp;
3887 lop = LIST_FIRST(&lfp->lf_locallock);
3889 while (lop != NULL) {
3891 * Only check locks for this file that aren't before the start of
3894 if (lop->lo_lfp == lfp) {
3896 if (lop->lo_end >= new_lop->lo_first) {
3897 if (new_lop->lo_end < lop->lo_first) {
3899 * If the new lock ends before the start of the
3900 * current lock's range, no merge, just insert
3905 if (new_lop->lo_flags == lop->lo_flags ||
3906 (new_lop->lo_first <= lop->lo_first &&
3907 new_lop->lo_end >= lop->lo_end)) {
3909 * This lock can be absorbed by the new lock/unlock.
3910 * This happens when it covers the entire range
3911 * of the old lock or is contiguous
3912 * with the old lock and is of the same type or an
3915 if (lop->lo_first < new_lop->lo_first)
3916 new_lop->lo_first = lop->lo_first;
3917 if (lop->lo_end > new_lop->lo_end)
3918 new_lop->lo_end = lop->lo_end;
3920 lop = LIST_NEXT(lop, lo_lckowner);
3921 nfsrv_freenfslock(tlop);
3926 * All these cases are for contiguous locks that are not the
3927 * same type, so they can't be merged.
3929 if (new_lop->lo_first <= lop->lo_first) {
3931 * This case is where the new lock overlaps with the
3932 * first part of the old lock. Move the start of the
3933 * old lock to just past the end of the new lock. The
3934 * new lock will be inserted in front of the old, since
3935 * ilop hasn't been updated. (We are done now.)
3937 lop->lo_first = new_lop->lo_end;
3940 if (new_lop->lo_end >= lop->lo_end) {
3942 * This case is where the new lock overlaps with the
3943 * end of the old lock's range. Move the old lock's
3944 * end to just before the new lock's first and insert
3945 * the new lock after the old lock.
3946 * Might not be done yet, since the new lock could
3947 * overlap further locks with higher ranges.
3949 lop->lo_end = new_lop->lo_first;
3951 lop = LIST_NEXT(lop, lo_lckowner);
3955 * The final case is where the new lock's range is in the
3956 * middle of the current lock's and splits the current lock
3957 * up. Use *other_lopp to handle the second part of the
3958 * split old lock range. (We are done now.)
3959 * For unlock, we use new_lop as other_lop and tmp, since
3960 * other_lop and new_lop are the same for this case.
3961 * We noted the unlock case above, so we don't need
3962 * new_lop->lo_flags any longer.
3964 tmp = new_lop->lo_first;
3965 if (other_lop == NULL) {
3967 panic("nfsd srv update unlock");
3968 other_lop = new_lop;
3971 other_lop->lo_first = new_lop->lo_end;
3972 other_lop->lo_end = lop->lo_end;
3973 other_lop->lo_flags = lop->lo_flags;
3974 other_lop->lo_stp = stp;
3975 other_lop->lo_lfp = lfp;
3977 nfsrv_insertlock(other_lop, lop, stp, lfp);
3984 lop = LIST_NEXT(lop, lo_lckowner);
3985 if (myfile && (lop == NULL || lop->lo_lfp != lfp))
3990 * Insert the new lock in the list at the appropriate place.
3993 nfsrv_insertlock(new_lop, ilop, stp, lfp);
3999 * This function handles sequencing of locks, etc.
4000 * It returns an error that indicates what the caller should do.
4003 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
4004 struct nfsstate *stp, struct nfsrvcache *op)
4008 if ((nd->nd_flag & ND_NFSV41) != 0)
4009 /* NFSv4.1 ignores the open_seqid and lock_seqid. */
4011 if (op != nd->nd_rp)
4012 panic("nfsrvstate checkseqid");
4013 if (!(op->rc_flag & RC_INPROG))
4014 panic("nfsrvstate not inprog");
4015 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) {
4016 printf("refcnt=%d\n", stp->ls_op->rc_refcnt);
4017 panic("nfsrvstate op refcnt");
4019 if ((stp->ls_seq + 1) == seqid) {
4021 nfsrvd_derefcache(stp->ls_op);
4023 nfsrvd_refcache(op);
4024 stp->ls_seq = seqid;
4026 } else if (stp->ls_seq == seqid && stp->ls_op &&
4027 op->rc_xid == stp->ls_op->rc_xid &&
4028 op->rc_refcnt == 0 &&
4029 op->rc_reqlen == stp->ls_op->rc_reqlen &&
4030 op->rc_cksum == stp->ls_op->rc_cksum) {
4031 if (stp->ls_op->rc_flag & RC_INPROG) {
4032 error = NFSERR_DONTREPLY;
4035 nd->nd_rp = stp->ls_op;
4036 nd->nd_rp->rc_flag |= RC_INPROG;
4037 nfsrvd_delcache(op);
4038 error = NFSERR_REPLYFROMCACHE;
4041 error = NFSERR_BADSEQID;
4044 NFSEXITCODE2(error, nd);
4049 * Get the client ip address for callbacks. If the strings can't be parsed,
4050 * just set lc_program to 0 to indicate no callbacks are possible.
4051 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set
4052 * the address to the client's transport address. This won't be used
4053 * for callbacks, but can be printed out by nfsstats for info.)
4054 * Return error if the xdr can't be parsed, 0 otherwise.
4057 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp)
4061 int i, j, maxalen = 0, minalen = 0;
4064 struct sockaddr_in *rin = NULL, *sin;
4067 struct sockaddr_in6 *rin6 = NULL, *sin6;
4070 int error = 0, cantparse = 0;
4080 /* 8 is the maximum length of the port# string. */
4081 addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK);
4082 clp->lc_req.nr_client = NULL;
4083 clp->lc_req.nr_lock = 0;
4085 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
4086 i = fxdr_unsigned(int, *tl);
4087 if (i >= 3 && i <= 4) {
4088 error = nfsrv_mtostr(nd, addr, i);
4092 if (!strcmp(addr, "tcp")) {
4093 clp->lc_flags |= LCL_TCPCALLBACK;
4094 clp->lc_req.nr_sotype = SOCK_STREAM;
4095 clp->lc_req.nr_soproto = IPPROTO_TCP;
4097 } else if (!strcmp(addr, "udp")) {
4098 clp->lc_req.nr_sotype = SOCK_DGRAM;
4099 clp->lc_req.nr_soproto = IPPROTO_UDP;
4104 if (af == AF_UNSPEC) {
4105 if (!strcmp(addr, "tcp6")) {
4106 clp->lc_flags |= LCL_TCPCALLBACK;
4107 clp->lc_req.nr_sotype = SOCK_STREAM;
4108 clp->lc_req.nr_soproto = IPPROTO_TCP;
4110 } else if (!strcmp(addr, "udp6")) {
4111 clp->lc_req.nr_sotype = SOCK_DGRAM;
4112 clp->lc_req.nr_soproto = IPPROTO_UDP;
4117 if (af == AF_UNSPEC) {
4123 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
4129 * The caller has allocated clp->lc_req.nr_nam to be large enough
4130 * for either AF_INET or AF_INET6 and zeroed out the contents.
4131 * maxalen is set to the maximum length of the host IP address string
4132 * plus 8 for the maximum length of the port#.
4133 * minalen is set to the minimum length of the host IP address string
4134 * plus 4 for the minimum length of the port#.
4135 * These lengths do not include NULL termination,
4136 * so INET[6]_ADDRSTRLEN - 1 is used in the calculations.
4141 rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
4142 rin->sin_family = AF_INET;
4143 rin->sin_len = sizeof(struct sockaddr_in);
4144 maxalen = INET_ADDRSTRLEN - 1 + 8;
4150 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
4151 rin6->sin6_family = AF_INET6;
4152 rin6->sin6_len = sizeof(struct sockaddr_in6);
4153 maxalen = INET6_ADDRSTRLEN - 1 + 8;
4158 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
4159 i = fxdr_unsigned(int, *tl);
4161 error = NFSERR_BADXDR;
4163 } else if (i == 0) {
4165 } else if (!cantparse && i <= maxalen && i >= minalen) {
4166 error = nfsrv_mtostr(nd, addr, i);
4171 * Parse out the address fields. We expect 6 decimal numbers
4172 * separated by '.'s for AF_INET and two decimal numbers
4173 * preceeded by '.'s for AF_INET6.
4179 * For AF_INET6, first parse the host address.
4182 cp = strchr(addr, '.');
4185 if (inet_pton(af, addr, &rin6->sin6_addr) == 1)
4201 while (cp != NULL && *cp && i < 6) {
4203 while (*cp2 && *cp2 != '.')
4211 j = nfsrv_getipnumber(cp);
4216 port.cval[5 - i] = j;
4226 * The host address INADDR_ANY is (mis)used to indicate
4227 * "there is no valid callback address".
4232 if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr,
4234 rin6->sin6_port = htons(port.sval);
4241 if (ip.ival != INADDR_ANY) {
4242 rin->sin_addr.s_addr = htonl(ip.ival);
4243 rin->sin_port = htons(port.sval);
4254 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
4260 switch (nd->nd_nam->sa_family) {
4263 sin = (struct sockaddr_in *)nd->nd_nam;
4264 rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
4265 rin->sin_family = AF_INET;
4266 rin->sin_len = sizeof(struct sockaddr_in);
4267 rin->sin_addr.s_addr = sin->sin_addr.s_addr;
4268 rin->sin_port = 0x0;
4273 sin6 = (struct sockaddr_in6 *)nd->nd_nam;
4274 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
4275 rin6->sin6_family = AF_INET6;
4276 rin6->sin6_len = sizeof(struct sockaddr_in6);
4277 rin6->sin6_addr = sin6->sin6_addr;
4278 rin6->sin6_port = 0x0;
4282 clp->lc_program = 0;
4286 NFSEXITCODE2(error, nd);
4291 * Turn a string of up to three decimal digits into a number. Return -1 upon
4295 nfsrv_getipnumber(u_char *cp)
4300 if (j > 2 || *cp < '0' || *cp > '9')
4313 * This function checks for restart conditions.
4316 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
4317 nfsv4stateid_t *stateidp, int specialid)
4322 * First check for a server restart. Open, LockT, ReleaseLockOwner
4323 * and DelegPurge have a clientid, the rest a stateid.
4326 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) {
4327 if (clientid.lval[0] != nfsrvboottime) {
4328 ret = NFSERR_STALECLIENTID;
4331 } else if (stateidp->other[0] != nfsrvboottime &&
4333 ret = NFSERR_STALESTATEID;
4338 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do
4339 * not use a lock/open owner seqid#, so the check can be done now.
4340 * (The others will be checked, as required, later.)
4342 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST)))
4346 ret = nfsrv_checkgrace(NULL, NULL, flags);
4358 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
4361 int error = 0, notreclaimed;
4362 struct nfsrv_stable *sp;
4364 if ((nfsrv_stablefirst.nsf_flags & (NFSNSF_UPDATEDONE |
4365 NFSNSF_GRACEOVER)) == 0) {
4367 * First, check to see if all of the clients have done a
4368 * ReclaimComplete. If so, grace can end now.
4371 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
4372 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) {
4377 if (notreclaimed == 0)
4378 nfsrv_stablefirst.nsf_flags |= (NFSNSF_GRACEOVER |
4382 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) {
4383 if (flags & NFSLCK_RECLAIM) {
4384 error = NFSERR_NOGRACE;
4388 if (!(flags & NFSLCK_RECLAIM)) {
4389 error = NFSERR_GRACE;
4392 if (nd != NULL && clp != NULL &&
4393 (nd->nd_flag & ND_NFSV41) != 0 &&
4394 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) {
4395 error = NFSERR_NOGRACE;
4400 * If grace is almost over and we are still getting Reclaims,
4401 * extend grace a bit.
4403 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) >
4404 nfsrv_stablefirst.nsf_eograce)
4405 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC +
4415 * Do a server callback.
4416 * The "trunc" argument is slightly overloaded and refers to different
4417 * boolean arguments for CBRECALL and CBLAYOUTRECALL.
4420 nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp,
4421 int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp,
4422 int laytype, NFSPROC_T *p)
4426 struct nfsrv_descript *nd;
4430 struct nfsdsession *sep = NULL;
4434 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO);
4435 cred = newnfs_getcred();
4436 NFSLOCKSTATE(); /* mostly for lc_cbref++ */
4437 if (clp->lc_flags & LCL_NEEDSCONFIRM) {
4444 * Fill the callback program# and version into the request
4445 * structure for newnfs_connect() to use.
4447 clp->lc_req.nr_prog = clp->lc_program;
4449 if ((clp->lc_flags & LCL_NFSV41) != 0)
4450 clp->lc_req.nr_vers = NFSV41_CBVERS;
4453 clp->lc_req.nr_vers = NFSV4_CBVERS;
4456 * First, fill in some of the fields of nd and cr.
4458 nd->nd_flag = ND_NFSV4;
4459 if (clp->lc_flags & LCL_GSS)
4460 nd->nd_flag |= ND_KERBV;
4461 if ((clp->lc_flags & LCL_NFSV41) != 0)
4462 nd->nd_flag |= ND_NFSV41;
4463 if ((clp->lc_flags & LCL_NFSV42) != 0)
4464 nd->nd_flag |= ND_NFSV42;
4466 cred->cr_uid = clp->lc_uid;
4467 cred->cr_gid = clp->lc_gid;
4468 callback = clp->lc_callback;
4470 cred->cr_ngroups = 1;
4473 * Get the first mbuf for the request.
4475 MGET(m, M_WAITOK, MT_DATA);
4477 nd->nd_mreq = nd->nd_mb = m;
4478 nd->nd_bpos = mtod(m, caddr_t);
4481 * and build the callback request.
4483 if (procnum == NFSV4OP_CBGETATTR) {
4484 nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
4485 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR,
4486 "CB Getattr", &sep);
4488 m_freem(nd->nd_mreq);
4491 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
4492 (void)nfsrv_putattrbit(nd, attrbitp);
4493 } else if (procnum == NFSV4OP_CBRECALL) {
4494 nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
4495 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL,
4498 m_freem(nd->nd_mreq);
4501 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
4502 *tl++ = txdr_unsigned(stateidp->seqid);
4503 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl,
4505 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
4510 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
4511 } else if (procnum == NFSV4OP_CBLAYOUTRECALL) {
4512 NFSD_DEBUG(4, "docallback layout recall\n");
4513 nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
4514 error = nfsrv_cbcallargs(nd, clp, callback,
4515 NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep);
4516 NFSD_DEBUG(4, "aft cbcallargs=%d\n", error);
4518 m_freem(nd->nd_mreq);
4521 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
4522 *tl++ = txdr_unsigned(laytype);
4523 *tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY);
4525 *tl++ = newnfs_true;
4527 *tl++ = newnfs_false;
4528 *tl = txdr_unsigned(NFSV4LAYOUTRET_FILE);
4529 nfsm_fhtom(nd, (uint8_t *)fhp, NFSX_MYFH, 0);
4530 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID);
4532 txdr_hyper(tval, tl); tl += 2;
4534 txdr_hyper(tval, tl); tl += 2;
4535 *tl++ = txdr_unsigned(stateidp->seqid);
4536 NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER);
4537 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
4538 NFSD_DEBUG(4, "aft args\n");
4539 } else if (procnum == NFSV4PROC_CBNULL) {
4540 nd->nd_procnum = NFSV4PROC_CBNULL;
4541 if ((clp->lc_flags & LCL_NFSV41) != 0) {
4542 error = nfsv4_getcbsession(clp, &sep);
4544 m_freem(nd->nd_mreq);
4549 error = NFSERR_SERVERFAULT;
4550 m_freem(nd->nd_mreq);
4555 * Call newnfs_connect(), as required, and then newnfs_request().
4558 if ((clp->lc_flags & LCL_TLSCB) != 0)
4560 (void) newnfs_sndlock(&clp->lc_req.nr_lock);
4561 if (clp->lc_req.nr_client == NULL) {
4562 if ((clp->lc_flags & LCL_NFSV41) != 0) {
4563 error = ECONNREFUSED;
4564 nfsrv_freesession(sep, NULL);
4565 } else if (nd->nd_procnum == NFSV4PROC_CBNULL)
4566 error = newnfs_connect(NULL, &clp->lc_req, cred,
4569 error = newnfs_connect(NULL, &clp->lc_req, cred,
4572 newnfs_sndunlock(&clp->lc_req.nr_lock);
4573 NFSD_DEBUG(4, "aft sndunlock=%d\n", error);
4575 if ((nd->nd_flag & ND_NFSV41) != 0) {
4576 KASSERT(sep != NULL, ("sep NULL"));
4577 if (sep->sess_cbsess.nfsess_xprt != NULL)
4578 error = newnfs_request(nd, NULL, clp,
4579 &clp->lc_req, NULL, NULL, cred,
4580 clp->lc_program, clp->lc_req.nr_vers, NULL,
4581 1, NULL, &sep->sess_cbsess);
4584 * This should probably never occur, but if a
4585 * client somehow does an RPC without a
4586 * SequenceID Op that causes a callback just
4587 * after the nfsd threads have been terminated
4588 * and restared we could conceivably get here
4589 * without a backchannel xprt.
4591 printf("nfsrv_docallback: no xprt\n");
4592 error = ECONNREFUSED;
4594 NFSD_DEBUG(4, "aft newnfs_request=%d\n", error);
4595 nfsrv_freesession(sep, NULL);
4597 error = newnfs_request(nd, NULL, clp, &clp->lc_req,
4598 NULL, NULL, cred, clp->lc_program,
4599 clp->lc_req.nr_vers, NULL, 1, NULL, NULL);
4605 * If error is set here, the Callback path isn't working
4606 * properly, so twiddle the appropriate LCL_ flags.
4607 * (nd_repstat != 0 indicates the Callback path is working,
4608 * but the callback failed on the client.)
4612 * Mark the callback pathway down, which disabled issuing
4613 * of delegations and gets Renew to return NFSERR_CBPATHDOWN.
4616 clp->lc_flags |= LCL_CBDOWN;
4620 * Callback worked. If the callback path was down, disable
4621 * callbacks, so no more delegations will be issued. (This
4622 * is done on the assumption that the callback pathway is
4626 if (clp->lc_flags & LCL_CBDOWN)
4627 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON);
4629 if (nd->nd_repstat) {
4630 error = nd->nd_repstat;
4631 NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n",
4633 } else if (error == 0 && procnum == NFSV4OP_CBGETATTR)
4634 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
4635 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL,
4637 m_freem(nd->nd_mrep);
4641 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) {
4642 clp->lc_flags &= ~LCL_WAKEUPWANTED;
4653 * Set up the compound RPC for the callback.
4656 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
4657 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp)
4662 len = strlen(optag);
4663 (void)nfsm_strtom(nd, optag, len);
4664 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED);
4665 if ((nd->nd_flag & ND_NFSV41) != 0) {
4666 if ((nd->nd_flag & ND_NFSV42) != 0)
4667 *tl++ = txdr_unsigned(NFSV42_MINORVERSION);
4669 *tl++ = txdr_unsigned(NFSV41_MINORVERSION);
4670 *tl++ = txdr_unsigned(callback);
4671 *tl++ = txdr_unsigned(2);
4672 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE);
4673 error = nfsv4_setcbsequence(nd, clp, 1, sepp);
4676 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
4677 *tl = txdr_unsigned(op);
4679 *tl++ = txdr_unsigned(NFSV4_MINORVERSION);
4680 *tl++ = txdr_unsigned(callback);
4681 *tl++ = txdr_unsigned(1);
4682 *tl = txdr_unsigned(op);
4688 * Return the next index# for a clientid. Mostly just increment and return
4689 * the next one, but... if the 32bit unsigned does actually wrap around,
4690 * it should be rebooted.
4691 * At an average rate of one new client per second, it will wrap around in
4692 * approximately 136 years. (I think the server will have been shut
4693 * down or rebooted before then.)
4696 nfsrv_nextclientindex(void)
4698 static u_int32_t client_index = 0;
4701 if (client_index != 0)
4702 return (client_index);
4704 printf("%s: out of clientids\n", __func__);
4705 return (client_index);
4709 * Return the next index# for a stateid. Mostly just increment and return
4710 * the next one, but... if the 32bit unsigned does actually wrap around
4711 * (will a BSD server stay up that long?), find
4712 * new start and end values.
4715 nfsrv_nextstateindex(struct nfsclient *clp)
4717 struct nfsstate *stp;
4719 u_int32_t canuse, min_index, max_index;
4721 if (!(clp->lc_flags & LCL_INDEXNOTOK)) {
4722 clp->lc_stateindex++;
4723 if (clp->lc_stateindex != clp->lc_statemaxindex)
4724 return (clp->lc_stateindex);
4728 * Yuck, we've hit the end.
4729 * Look for a new min and max.
4732 max_index = 0xffffffff;
4733 for (i = 0; i < nfsrv_statehashsize; i++) {
4734 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
4735 if (stp->ls_stateid.other[2] > 0x80000000) {
4736 if (stp->ls_stateid.other[2] < max_index)
4737 max_index = stp->ls_stateid.other[2];
4739 if (stp->ls_stateid.other[2] > min_index)
4740 min_index = stp->ls_stateid.other[2];
4746 * Yikes, highly unlikely, but I'll handle it anyhow.
4748 if (min_index == 0x80000000 && max_index == 0x80000001) {
4751 * Loop around until we find an unused entry. Return that
4752 * and set LCL_INDEXNOTOK, so the search will continue next time.
4753 * (This is one of those rare cases where a goto is the
4754 * cleanest way to code the loop.)
4757 for (i = 0; i < nfsrv_statehashsize; i++) {
4758 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
4759 if (stp->ls_stateid.other[2] == canuse) {
4765 clp->lc_flags |= LCL_INDEXNOTOK;
4770 * Ok to start again from min + 1.
4772 clp->lc_stateindex = min_index + 1;
4773 clp->lc_statemaxindex = max_index;
4774 clp->lc_flags &= ~LCL_INDEXNOTOK;
4775 return (clp->lc_stateindex);
4779 * The following functions handle the stable storage file that deals with
4780 * the edge conditions described in RFC3530 Sec. 8.6.3.
4781 * The file is as follows:
4782 * - a single record at the beginning that has the lease time of the
4783 * previous server instance (before the last reboot) and the nfsrvboottime
4784 * values for the previous server boots.
4785 * These previous boot times are used to ensure that the current
4786 * nfsrvboottime does not, somehow, get set to a previous one.
4787 * (This is important so that Stale ClientIDs and StateIDs can
4789 * The number of previous nfsvrboottime values precedes the list.
4790 * - followed by some number of appended records with:
4791 * - client id string
4792 * - flag that indicates it is a record revoking state via lease
4793 * expiration or similar
4794 * OR has successfully acquired state.
4795 * These structures vary in length, with the client string at the end, up
4796 * to NFSV4_OPAQUELIMIT in size.
4798 * At the end of the grace period, the file is truncated, the first
4799 * record is rewritten with updated information and any acquired state
4800 * records for successful reclaims of state are written.
4802 * Subsequent records are appended when the first state is issued to
4803 * a client and when state is revoked for a client.
4805 * When reading the file in, state issued records that come later in
4806 * the file override older ones, since the append log is in cronological order.
4807 * If, for some reason, the file can't be read, the grace period is
4808 * immediately terminated and all reclaims get NFSERR_NOGRACE.
4812 * Read in the stable storage file. Called by nfssvc() before the nfsd
4813 * processes start servicing requests.
4816 nfsrv_setupstable(NFSPROC_T *p)
4818 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
4819 struct nfsrv_stable *sp, *nsp;
4820 struct nfst_rec *tsp;
4821 int error, i, tryagain;
4823 ssize_t aresid, len;
4826 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without
4827 * a reboot, so state has not been lost.
4829 if (sf->nsf_flags & NFSNSF_UPDATEDONE)
4832 * Set Grace over just until the file reads successfully.
4834 nfsrvboottime = time_second;
4835 LIST_INIT(&sf->nsf_head);
4836 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
4837 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA;
4838 if (sf->nsf_fp == NULL)
4840 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4841 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE,
4842 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4843 if (error || aresid || sf->nsf_numboots == 0 ||
4844 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS)
4848 * Now, read in the boottimes.
4850 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) *
4851 sizeof (time_t), M_TEMP, M_WAITOK);
4852 off = sizeof (struct nfsf_rec);
4853 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4854 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off,
4855 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4856 if (error || aresid) {
4857 free(sf->nsf_bootvals, M_TEMP);
4858 sf->nsf_bootvals = NULL;
4863 * Make sure this nfsrvboottime is different from all recorded
4868 for (i = 0; i < sf->nsf_numboots; i++) {
4869 if (nfsrvboottime == sf->nsf_bootvals[i]) {
4877 sf->nsf_flags |= NFSNSF_OK;
4878 off += (sf->nsf_numboots * sizeof (time_t));
4881 * Read through the file, building a list of records for grace
4883 * Each record is between sizeof (struct nfst_rec) and
4884 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1
4885 * and is actually sizeof (struct nfst_rec) + nst_len - 1.
4887 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
4888 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK);
4890 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
4891 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1,
4892 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
4893 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid;
4894 if (error || (len > 0 && (len < sizeof (struct nfst_rec) ||
4895 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) {
4897 * Yuck, the file has been corrupted, so just return
4898 * after clearing out any restart state, so the grace period
4901 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
4902 LIST_REMOVE(sp, nst_list);
4906 sf->nsf_flags &= ~NFSNSF_OK;
4907 free(sf->nsf_bootvals, M_TEMP);
4908 sf->nsf_bootvals = NULL;
4912 off += sizeof (struct nfst_rec) + tsp->len - 1;
4914 * Search the list for a matching client.
4916 LIST_FOREACH(sp, &sf->nsf_head, nst_list) {
4917 if (tsp->len == sp->nst_len &&
4918 !NFSBCMP(tsp->client, sp->nst_client, tsp->len))
4921 if (sp == LIST_END(&sf->nsf_head)) {
4922 sp = (struct nfsrv_stable *)malloc(tsp->len +
4923 sizeof (struct nfsrv_stable) - 1, M_TEMP,
4925 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec,
4926 sizeof (struct nfst_rec) + tsp->len - 1);
4927 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list);
4929 if (tsp->flag == NFSNST_REVOKE)
4930 sp->nst_flag |= NFSNST_REVOKE;
4933 * A subsequent timestamp indicates the client
4934 * did a setclientid/confirm and any previous
4935 * revoke is no longer relevant.
4937 sp->nst_flag &= ~NFSNST_REVOKE;
4942 sf->nsf_flags = NFSNSF_OK;
4943 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease +
4948 * Update the stable storage file, now that the grace period is over.
4951 nfsrv_updatestable(NFSPROC_T *p)
4953 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
4954 struct nfsrv_stable *sp, *nsp;
4956 struct nfsvattr nva;
4958 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000)
4963 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE))
4965 sf->nsf_flags |= NFSNSF_UPDATEDONE;
4967 * Ok, we need to rewrite the stable storage file.
4968 * - truncate to 0 length
4969 * - write the new first structure
4970 * - loop through the data structures, writing out any that
4971 * have timestamps older than the old boot
4973 if (sf->nsf_bootvals) {
4975 for (i = sf->nsf_numboots - 2; i >= 0; i--)
4976 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i];
4978 sf->nsf_numboots = 1;
4979 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t),
4982 sf->nsf_bootvals[0] = nfsrvboottime;
4983 sf->nsf_lease = nfsrv_lease;
4984 NFSVNO_ATTRINIT(&nva);
4985 NFSVNO_SETATTRVAL(&nva, size, 0);
4986 vp = NFSFPVNODE(sf->nsf_fp);
4987 vn_start_write(vp, &mp, V_WAIT);
4988 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
4989 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p,
4994 vn_finished_write(mp);
4996 error = NFSD_RDWR(UIO_WRITE, vp,
4997 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0,
4998 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
5000 error = NFSD_RDWR(UIO_WRITE, vp,
5001 (caddr_t)sf->nsf_bootvals,
5002 sf->nsf_numboots * sizeof (time_t),
5003 (off_t)(sizeof (struct nfsf_rec)),
5004 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
5005 free(sf->nsf_bootvals, M_TEMP);
5006 sf->nsf_bootvals = NULL;
5008 sf->nsf_flags &= ~NFSNSF_OK;
5009 printf("EEK! Can't write NfsV4 stable storage file\n");
5012 sf->nsf_flags |= NFSNSF_OK;
5015 * Loop through the list and write out timestamp records for
5016 * any clients that successfully reclaimed state.
5018 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
5019 if (sp->nst_flag & NFSNST_GOTSTATE) {
5020 nfsrv_writestable(sp->nst_client, sp->nst_len,
5021 NFSNST_NEWSTATE, p);
5022 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE;
5024 LIST_REMOVE(sp, nst_list);
5027 nfsrv_backupstable();
5031 * Append a record to the stable storage file.
5034 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p)
5036 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst;
5037 struct nfst_rec *sp;
5040 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL)
5042 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
5043 len - 1, M_TEMP, M_WAITOK);
5045 NFSBCOPY(client, sp->client, len);
5047 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp),
5048 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0,
5049 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p);
5052 sf->nsf_flags &= ~NFSNSF_OK;
5053 printf("EEK! Can't write NfsV4 stable storage file\n");
5058 * This function is called during the grace period to mark a client
5059 * that successfully reclaimed state.
5062 nfsrv_markstable(struct nfsclient *clp)
5064 struct nfsrv_stable *sp;
5067 * First find the client structure.
5069 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
5070 if (sp->nst_len == clp->lc_idlen &&
5071 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
5074 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head))
5078 * Now, just mark it and set the nfsclient back pointer.
5080 sp->nst_flag |= NFSNST_GOTSTATE;
5085 * This function is called when a NFSv4.1 client does a ReclaimComplete.
5086 * Very similar to nfsrv_markstable(), except for the flag being set.
5089 nfsrv_markreclaim(struct nfsclient *clp)
5091 struct nfsrv_stable *sp;
5094 * First find the client structure.
5096 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
5097 if (sp->nst_len == clp->lc_idlen &&
5098 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
5101 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head))
5105 * Now, just set the flag.
5107 sp->nst_flag |= NFSNST_RECLAIMED;
5111 * This function is called for a reclaim, to see if it gets grace.
5112 * It returns 0 if a reclaim is allowed, 1 otherwise.
5115 nfsrv_checkstable(struct nfsclient *clp)
5117 struct nfsrv_stable *sp;
5120 * First, find the entry for the client.
5122 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) {
5123 if (sp->nst_len == clp->lc_idlen &&
5124 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
5129 * If not in the list, state was revoked or no state was issued
5130 * since the previous reboot, a reclaim is denied.
5132 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) ||
5133 (sp->nst_flag & NFSNST_REVOKE) ||
5134 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK))
5140 * Test for and try to clear out a conflicting client. This is called by
5141 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients
5143 * The trick here is that it can't revoke a conflicting client with an
5144 * expired lease unless it holds the v4root lock, so...
5145 * If no v4root lock, get the lock and return 1 to indicate "try again".
5146 * Return 0 to indicate the conflict can't be revoked and 1 to indicate
5147 * the revocation worked and the conflicting client is "bye, bye", so it
5148 * can be tried again.
5149 * Return 2 to indicate that the vnode is VIRF_DOOMED after NFSVOPLOCK().
5150 * Unlocks State before a non-zero value is returned.
5153 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp,
5156 int gotlock, lktype = 0;
5159 * If lease hasn't expired, we can't fix it.
5161 if (clp->lc_expiry >= NFSD_MONOSEC ||
5162 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE))
5164 if (*haslockp == 0) {
5167 lktype = NFSVOPISLOCKED(vp);
5170 NFSLOCKV4ROOTMUTEX();
5171 nfsv4_relref(&nfsv4rootfs_lock);
5173 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
5174 NFSV4ROOTLOCKMUTEXPTR, NULL);
5176 NFSUNLOCKV4ROOTMUTEX();
5179 NFSVOPLOCK(vp, lktype | LK_RETRY);
5180 if (VN_IS_DOOMED(vp))
5188 * Ok, we can expire the conflicting client.
5190 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
5191 nfsrv_backupstable();
5192 nfsrv_cleanclient(clp, p);
5193 nfsrv_freedeleglist(&clp->lc_deleg);
5194 nfsrv_freedeleglist(&clp->lc_olddeleg);
5195 LIST_REMOVE(clp, lc_hash);
5196 nfsrv_zapclient(clp, p);
5201 * Resolve a delegation conflict.
5202 * Returns 0 to indicate the conflict was resolved without sleeping.
5203 * Return -1 to indicate that the caller should check for conflicts again.
5204 * Return > 0 for an error that should be returned, normally NFSERR_DELAY.
5206 * Also, manipulate the nfsv4root_lock, as required. It isn't changed
5207 * for a return of 0, since there was no sleep and it could be required
5208 * later. It is released for a return of NFSERR_DELAY, since the caller
5209 * will return that error. It is released when a sleep was done waiting
5210 * for the delegation to be returned or expire (so that other nfsds can
5211 * handle ops). Then, it must be acquired for the write to stable storage.
5212 * (This function is somewhat similar to nfsrv_clientconflict(), but
5213 * the semantics differ in a couple of subtle ways. The return of 0
5214 * indicates the conflict was resolved without sleeping here, not
5215 * that the conflict can't be resolved and the handling of nfsv4root_lock
5216 * differs, as noted above.)
5217 * Unlocks State before returning a non-zero value.
5220 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p,
5223 struct nfsclient *clp = stp->ls_clp;
5224 int gotlock, error, lktype = 0, retrycnt, zapped_clp;
5225 nfsv4stateid_t tstateid;
5229 * If the conflict is with an old delegation...
5231 if (stp->ls_flags & NFSLCK_OLDDELEG) {
5233 * You can delete it, if it has expired.
5235 if (clp->lc_delegtime < NFSD_MONOSEC) {
5236 nfsrv_freedeleg(stp);
5243 * During this delay, the old delegation could expire or it
5244 * could be recovered by the client via an Open with
5245 * CLAIM_DELEGATE_PREV.
5246 * Release the nfsv4root_lock, if held.
5250 NFSLOCKV4ROOTMUTEX();
5251 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5252 NFSUNLOCKV4ROOTMUTEX();
5254 error = NFSERR_DELAY;
5259 * It's a current delegation, so:
5260 * - check to see if the delegation has expired
5261 * - if so, get the v4root lock and then expire it
5263 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) {
5265 * - do a recall callback, since not yet done
5266 * For now, never allow truncate to be set. To use
5267 * truncate safely, it must be guaranteed that the
5268 * Remove, Rename or Setattr with size of 0 will
5269 * succeed and that would require major changes to
5270 * the VFS/Vnode OPs.
5271 * Set the expiry time large enough so that it won't expire
5272 * until after the callback, then set it correctly, once
5273 * the callback is done. (The delegation will now time
5274 * out whether or not the Recall worked ok. The timeout
5275 * will be extended when ops are done on the delegation
5276 * stateid, up to the timelimit.)
5278 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) +
5280 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) +
5282 stp->ls_flags |= NFSLCK_DELEGRECALL;
5285 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies
5286 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done
5287 * in order to try and avoid a race that could happen
5288 * when a CBRecall request passed the Open reply with
5289 * the delegation in it when transitting the network.
5290 * Since nfsrv_docallback will sleep, don't use stp after
5293 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid,
5295 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh,
5300 NFSLOCKV4ROOTMUTEX();
5301 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5302 NFSUNLOCKV4ROOTMUTEX();
5306 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL,
5307 &tstateid, 0, &tfh, NULL, NULL, 0, p);
5309 } while ((error == NFSERR_BADSTATEID ||
5310 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT);
5311 error = NFSERR_DELAY;
5315 if (clp->lc_expiry >= NFSD_MONOSEC &&
5316 stp->ls_delegtime >= NFSD_MONOSEC) {
5319 * A recall has been done, but it has not yet expired.
5324 NFSLOCKV4ROOTMUTEX();
5325 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5326 NFSUNLOCKV4ROOTMUTEX();
5328 error = NFSERR_DELAY;
5333 * If we don't yet have the lock, just get it and then return,
5334 * since we need that before deleting expired state, such as
5336 * When getting the lock, unlock the vnode, so other nfsds that
5337 * are in progress, won't get stuck waiting for the vnode lock.
5339 if (*haslockp == 0) {
5342 lktype = NFSVOPISLOCKED(vp);
5345 NFSLOCKV4ROOTMUTEX();
5346 nfsv4_relref(&nfsv4rootfs_lock);
5348 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
5349 NFSV4ROOTLOCKMUTEXPTR, NULL);
5351 NFSUNLOCKV4ROOTMUTEX();
5354 NFSVOPLOCK(vp, lktype | LK_RETRY);
5355 if (VN_IS_DOOMED(vp)) {
5357 NFSLOCKV4ROOTMUTEX();
5358 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5359 NFSUNLOCKV4ROOTMUTEX();
5360 error = NFSERR_PERM;
5370 * Ok, we can delete the expired delegation.
5371 * First, write the Revoke record to stable storage and then
5372 * clear out the conflict.
5373 * Since all other nfsd threads are now blocked, we can safely
5374 * sleep without the state changing.
5376 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
5377 nfsrv_backupstable();
5378 if (clp->lc_expiry < NFSD_MONOSEC) {
5379 nfsrv_cleanclient(clp, p);
5380 nfsrv_freedeleglist(&clp->lc_deleg);
5381 nfsrv_freedeleglist(&clp->lc_olddeleg);
5382 LIST_REMOVE(clp, lc_hash);
5385 nfsrv_freedeleg(stp);
5389 nfsrv_zapclient(clp, p);
5398 * Check for a remove allowed, if remove is set to 1 and get rid of
5402 nfsrv_checkremove(vnode_t vp, int remove, struct nfsrv_descript *nd,
5403 nfsquad_t clientid, NFSPROC_T *p)
5405 struct nfsclient *clp;
5406 struct nfsstate *stp;
5407 struct nfslockfile *lfp;
5408 int error, haslock = 0;
5413 * First, get the lock file structure.
5414 * (A return of -1 means no associated state, so remove ok.)
5416 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
5419 if (error == 0 && clientid.qval != 0)
5420 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
5421 (nfsquad_t)((u_quad_t)0), 0, nd, p);
5423 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
5427 NFSLOCKV4ROOTMUTEX();
5428 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5429 NFSUNLOCKV4ROOTMUTEX();
5437 * Now, we must Recall any delegations.
5439 error = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p);
5442 * nfsrv_cleandeleg() unlocks state for non-zero
5448 NFSLOCKV4ROOTMUTEX();
5449 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5450 NFSUNLOCKV4ROOTMUTEX();
5456 * Now, look for a conflicting open share.
5460 * If the entry in the directory was the last reference to the
5461 * corresponding filesystem object, the object can be destroyed
5463 if(lfp->lf_usecount>1)
5464 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
5465 if (stp->ls_flags & NFSLCK_WRITEDENY) {
5466 error = NFSERR_FILEOPEN;
5474 NFSLOCKV4ROOTMUTEX();
5475 nfsv4_unlock(&nfsv4rootfs_lock, 1);
5476 NFSUNLOCKV4ROOTMUTEX();
5485 * Clear out all delegations for the file referred to by lfp.
5486 * May return NFSERR_DELAY, if there will be a delay waiting for
5487 * delegations to expire.
5488 * Returns -1 to indicate it slept while recalling a delegation.
5489 * This function has the side effect of deleting the nfslockfile structure,
5490 * if it no longer has associated state and didn't have to sleep.
5491 * Unlocks State before a non-zero value is returned.
5494 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
5495 struct nfsclient *clp, int *haslockp, NFSPROC_T *p)
5497 struct nfsstate *stp, *nstp;
5500 stp = LIST_FIRST(&lfp->lf_deleg);
5501 while (stp != LIST_END(&lfp->lf_deleg)) {
5502 nstp = LIST_NEXT(stp, ls_file);
5503 if (stp->ls_clp != clp) {
5504 ret = nfsrv_delegconflict(stp, haslockp, p, vp);
5507 * nfsrv_delegconflict() unlocks state
5508 * when it returns non-zero.
5521 * There are certain operations that, when being done outside of NFSv4,
5522 * require that any NFSv4 delegation for the file be recalled.
5523 * This function is to be called for those cases:
5524 * VOP_RENAME() - When a delegation is being recalled for any reason,
5525 * the client may have to do Opens against the server, using the file's
5526 * final component name. If the file has been renamed on the server,
5527 * that component name will be incorrect and the Open will fail.
5528 * VOP_REMOVE() - Theoretically, a client could Open a file after it has
5529 * been removed on the server, if there is a delegation issued to
5530 * that client for the file. I say "theoretically" since clients
5531 * normally do an Access Op before the Open and that Access Op will
5532 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so
5533 * they will detect the file's removal in the same manner. (There is
5534 * one case where RFC3530 allows a client to do an Open without first
5535 * doing an Access Op, which is passage of a check against the ACE
5536 * returned with a Write delegation, but current practice is to ignore
5537 * the ACE and always do an Access Op.)
5538 * Since the functions can only be called with an unlocked vnode, this
5539 * can't be done at this time.
5540 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range
5541 * locks locally in the client, which are not visible to the server. To
5542 * deal with this, issuing of delegations for a vnode must be disabled
5543 * and all delegations for the vnode recalled. This is done via the
5544 * second function, using the VV_DISABLEDELEG vflag on the vnode.
5547 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
5553 * First, check to see if the server is currently running and it has
5554 * been called for a regular file when issuing delegations.
5556 if (newnfs_numnfsd == 0 || vp->v_type != VREG ||
5557 nfsrv_issuedelegs == 0)
5560 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp));
5562 * First, get a reference on the nfsv4rootfs_lock so that an
5563 * exclusive lock cannot be acquired by another thread.
5565 NFSLOCKV4ROOTMUTEX();
5566 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
5567 NFSUNLOCKV4ROOTMUTEX();
5570 * Now, call nfsrv_checkremove() in a loop while it returns
5571 * NFSERR_DELAY. Return upon any other error or when timed out.
5573 starttime = NFSD_MONOSEC;
5575 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
5576 error = nfsrv_checkremove(vp, 0, NULL,
5577 (nfsquad_t)((u_quad_t)0), p);
5581 if (error == NFSERR_DELAY) {
5582 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO)
5584 /* Sleep for a short period of time */
5585 (void) nfs_catnap(PZERO, 0, "nfsremove");
5587 } while (error == NFSERR_DELAY);
5588 NFSLOCKV4ROOTMUTEX();
5589 nfsv4_relref(&nfsv4rootfs_lock);
5590 NFSUNLOCKV4ROOTMUTEX();
5594 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p)
5597 #ifdef VV_DISABLEDELEG
5599 * First, flag issuance of delegations disabled.
5601 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG);
5605 * Then call nfsd_recalldelegation() to get rid of all extant
5608 nfsd_recalldelegation(vp, p);
5612 * Check for conflicting locks, etc. and then get rid of delegations.
5613 * (At one point I thought that I should get rid of delegations for any
5614 * Setattr, since it could potentially disallow the I/O op (read or write)
5615 * allowed by the delegation. However, Setattr Ops that aren't changing
5616 * the size get a stateid of all 0s, so you can't tell if it is a delegation
5617 * for the same client or a different one, so I decided to only get rid
5618 * of delegations for other clients when the size is being changed.)
5619 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such
5620 * as Write backs, even if there is no delegation, so it really isn't any
5624 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd,
5625 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp,
5626 struct nfsexstuff *exp, NFSPROC_T *p)
5628 struct nfsstate st, *stp = &st;
5629 struct nfslock lo, *lop = &lo;
5633 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) {
5634 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
5635 lop->lo_first = nvap->na_size;
5640 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) ||
5641 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) ||
5642 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) ||
5643 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL))
5644 stp->ls_flags |= NFSLCK_SETATTR;
5645 if (stp->ls_flags == 0)
5647 lop->lo_end = NFS64BITSSET;
5648 lop->lo_flags = NFSLCK_WRITE;
5649 stp->ls_ownerlen = 0;
5651 stp->ls_uid = nd->nd_cred->cr_uid;
5652 stp->ls_stateid.seqid = stateidp->seqid;
5653 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0];
5654 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1];
5655 stp->ls_stateid.other[2] = stateidp->other[2];
5656 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
5657 stateidp, exp, nd, p);
5660 NFSEXITCODE2(error, nd);
5665 * Check for a write delegation and do a CBGETATTR if there is one, updating
5666 * the attributes, as required.
5667 * Should I return an error if I can't get the attributes? (For now, I'll
5671 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp,
5672 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p)
5674 struct nfsstate *stp;
5675 struct nfslockfile *lfp;
5676 struct nfsclient *clp;
5677 struct nfsvattr nva;
5680 nfsattrbit_t cbbits;
5681 u_quad_t delegfilerev;
5683 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits);
5684 if (!NFSNONZERO_ATTRBIT(&cbbits))
5686 if (nfsrv_writedelegcnt == 0)
5690 * Get the lock file structure.
5691 * (A return of -1 means no associated state, so return ok.)
5693 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
5696 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
5705 * Now, look for a write delegation.
5707 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
5708 if (stp->ls_flags & NFSLCK_DELEGWRITE)
5711 if (stp == LIST_END(&lfp->lf_deleg)) {
5717 /* If the clientid is not confirmed, ignore the delegation. */
5718 if (clp->lc_flags & LCL_NEEDSCONFIRM) {
5723 delegfilerev = stp->ls_filerev;
5725 * If the Write delegation was issued as a part of this Compound RPC
5726 * or if we have an Implied Clientid (used in a previous Op in this
5727 * compound) and it is the client the delegation was issued to,
5729 * I also assume that it is from the same client iff the network
5730 * host IP address is the same as the callback address. (Not
5731 * exactly correct by the RFC, but avoids a lot of Getattr
5734 if (nd->nd_compref == stp->ls_compref ||
5735 ((nd->nd_flag & ND_IMPLIEDCLID) &&
5736 clp->lc_clientid.qval == nd->nd_clientid.qval) ||
5737 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) {
5743 * We are now done with the delegation state structure,
5744 * so the statelock can be released and we can now tsleep().
5748 * Now, we must do the CB Getattr callback, to see if Change or Size
5751 if (clp->lc_expiry >= NFSD_MONOSEC) {
5753 NFSVNO_ATTRINIT(&nva);
5754 nva.na_filerev = NFS64BITSSET;
5755 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL,
5756 0, &nfh, &nva, &cbbits, 0, p);
5758 if ((nva.na_filerev != NFS64BITSSET &&
5759 nva.na_filerev > delegfilerev) ||
5760 (NFSVNO_ISSETSIZE(&nva) &&
5761 nva.na_size != nvap->na_size)) {
5762 error = nfsvno_updfilerev(vp, nvap, nd, p);
5763 if (NFSVNO_ISSETSIZE(&nva))
5764 nvap->na_size = nva.na_size;
5767 error = 0; /* Ignore callback errors for now. */
5773 NFSEXITCODE2(error, nd);
5778 * This function looks for openowners that haven't had any opens for
5779 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS
5783 nfsrv_throwawayopens(NFSPROC_T *p)
5785 struct nfsclient *clp, *nclp;
5786 struct nfsstate *stp, *nstp;
5790 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS;
5792 * For each client...
5794 for (i = 0; i < nfsrv_clienthashsize; i++) {
5795 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) {
5796 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) {
5797 if (LIST_EMPTY(&stp->ls_open) &&
5798 (stp->ls_noopens > NFSNOOPEN ||
5799 (nfsrv_openpluslock * 2) >
5800 nfsrv_v4statelimit))
5801 nfsrv_freeopenowner(stp, 0, p);
5809 * This function checks to see if the credentials are the same.
5810 * Returns 1 for not same, 0 otherwise.
5813 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp)
5816 if (nd->nd_flag & ND_GSS) {
5817 if (!(clp->lc_flags & LCL_GSS))
5819 if (clp->lc_flags & LCL_NAME) {
5820 if (nd->nd_princlen != clp->lc_namelen ||
5821 NFSBCMP(nd->nd_principal, clp->lc_name,
5827 if (nd->nd_cred->cr_uid == clp->lc_uid)
5831 } else if (clp->lc_flags & LCL_GSS)
5834 * For AUTH_SYS, allow the same uid or root. (This is underspecified
5835 * in RFC3530, which talks about principals, but doesn't say anything
5836 * about uids for AUTH_SYS.)
5838 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0)
5845 * Calculate the lease expiry time.
5848 nfsrv_leaseexpiry(void)
5851 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC)
5852 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA));
5853 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA);
5857 * Delay the delegation timeout as far as ls_delegtimelimit, as required.
5860 nfsrv_delaydelegtimeout(struct nfsstate *stp)
5863 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0)
5866 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC &&
5867 stp->ls_delegtime < stp->ls_delegtimelimit) {
5868 stp->ls_delegtime += nfsrv_lease;
5869 if (stp->ls_delegtime > stp->ls_delegtimelimit)
5870 stp->ls_delegtime = stp->ls_delegtimelimit;
5875 * This function checks to see if there is any other state associated
5876 * with the openowner for this Open.
5877 * It returns 1 if there is no other state, 0 otherwise.
5880 nfsrv_nootherstate(struct nfsstate *stp)
5882 struct nfsstate *tstp;
5884 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) {
5885 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock))
5892 * Create a list of lock deltas (changes to local byte range locking
5893 * that can be rolled back using the list) and apply the changes via
5894 * nfsvno_advlock(). Optionally, lock the list. It is expected that either
5895 * the rollback or update function will be called after this.
5896 * It returns an error (and rolls back, as required), if any nfsvno_advlock()
5897 * call fails. If it returns an error, it will unlock the list.
5900 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
5901 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
5903 struct nfslock *lop, *nlop;
5906 /* Loop through the list of locks. */
5907 lop = LIST_FIRST(&lfp->lf_locallock);
5908 while (first < end && lop != NULL) {
5909 nlop = LIST_NEXT(lop, lo_lckowner);
5910 if (first >= lop->lo_end) {
5913 } else if (first < lop->lo_first) {
5914 /* new one starts before entry in list */
5915 if (end <= lop->lo_first) {
5916 /* no overlap between old and new */
5917 error = nfsrv_dolocal(vp, lfp, flags,
5918 NFSLCK_UNLOCK, first, end, cfp, p);
5923 /* handle fragment overlapped with new one */
5924 error = nfsrv_dolocal(vp, lfp, flags,
5925 NFSLCK_UNLOCK, first, lop->lo_first, cfp,
5929 first = lop->lo_first;
5932 /* new one overlaps this entry in list */
5933 if (end <= lop->lo_end) {
5934 /* overlaps all of new one */
5935 error = nfsrv_dolocal(vp, lfp, flags,
5936 lop->lo_flags, first, end, cfp, p);
5941 /* handle fragment overlapped with new one */
5942 error = nfsrv_dolocal(vp, lfp, flags,
5943 lop->lo_flags, first, lop->lo_end, cfp, p);
5946 first = lop->lo_end;
5951 if (first < end && error == 0)
5952 /* handle fragment past end of list */
5953 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first,
5961 * Local lock unlock. Unlock all byte ranges that are no longer locked
5962 * by NFSv4. To do this, unlock any subranges of first-->end that
5963 * do not overlap with the byte ranges of any lock in the lfp->lf_lock
5964 * list. This list has all locks for the file held by other
5965 * <clientid, lockowner> tuples. The list is ordered by increasing
5966 * lo_first value, but may have entries that overlap each other, for
5967 * the case of read locks.
5970 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first,
5971 uint64_t init_end, NFSPROC_T *p)
5973 struct nfslock *lop;
5974 uint64_t first, end, prevfirst __unused;
5978 while (first < init_end) {
5979 /* Loop through all nfs locks, adjusting first and end */
5981 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
5982 KASSERT(prevfirst <= lop->lo_first,
5983 ("nfsv4 locks out of order"));
5984 KASSERT(lop->lo_first < lop->lo_end,
5985 ("nfsv4 bogus lock"));
5986 prevfirst = lop->lo_first;
5987 if (first >= lop->lo_first &&
5988 first < lop->lo_end)
5990 * Overlaps with initial part, so trim
5991 * off that initial part by moving first past
5994 first = lop->lo_end;
5995 else if (end > lop->lo_first &&
5996 lop->lo_first > first) {
5998 * This lock defines the end of the
5999 * segment to unlock, so set end to the
6000 * start of it and break out of the loop.
6002 end = lop->lo_first;
6007 * There is no segment left to do, so
6008 * break out of this loop and then exit
6009 * the outer while() since first will be set
6010 * to end, which must equal init_end here.
6015 /* Unlock this segment */
6016 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK,
6017 NFSLCK_READ, first, end, NULL, p);
6018 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK,
6022 * Now move past this segment and look for any further
6023 * segment in the range, if there is one.
6031 * Do the local lock operation and update the rollback list, as required.
6032 * Perform the rollback and return the error if nfsvno_advlock() fails.
6035 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags,
6036 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
6038 struct nfsrollback *rlp;
6039 int error = 0, ltype, oldltype;
6041 if (flags & NFSLCK_WRITE)
6043 else if (flags & NFSLCK_READ)
6047 if (oldflags & NFSLCK_WRITE)
6049 else if (oldflags & NFSLCK_READ)
6053 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK))
6056 error = nfsvno_advlock(vp, ltype, first, end, p);
6059 cfp->cl_clientid.lval[0] = 0;
6060 cfp->cl_clientid.lval[1] = 0;
6062 cfp->cl_end = NFS64BITSSET;
6063 cfp->cl_flags = NFSLCK_WRITE;
6064 cfp->cl_ownerlen = 5;
6065 NFSBCOPY("LOCAL", cfp->cl_owner, 5);
6067 nfsrv_locallock_rollback(vp, lfp, p);
6068 } else if (ltype != F_UNLCK) {
6069 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK,
6071 rlp->rlck_first = first;
6072 rlp->rlck_end = end;
6073 rlp->rlck_type = oldltype;
6074 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list);
6083 * Roll back local lock changes and free up the rollback list.
6086 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p)
6088 struct nfsrollback *rlp, *nrlp;
6090 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) {
6091 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first,
6093 free(rlp, M_NFSDROLLBACK);
6095 LIST_INIT(&lfp->lf_rollback);
6099 * Update local lock list and delete rollback list (ie now committed to the
6100 * local locks). Most of the work is done by the internal function.
6103 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first,
6106 struct nfsrollback *rlp, *nrlp;
6107 struct nfslock *new_lop, *other_lop;
6109 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK);
6110 if (flags & (NFSLCK_READ | NFSLCK_WRITE))
6111 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK,
6115 new_lop->lo_flags = flags;
6116 new_lop->lo_first = first;
6117 new_lop->lo_end = end;
6118 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp);
6119 if (new_lop != NULL)
6120 free(new_lop, M_NFSDLOCK);
6121 if (other_lop != NULL)
6122 free(other_lop, M_NFSDLOCK);
6124 /* and get rid of the rollback list */
6125 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp)
6126 free(rlp, M_NFSDROLLBACK);
6127 LIST_INIT(&lfp->lf_rollback);
6131 * Lock the struct nfslockfile for local lock updating.
6134 nfsrv_locklf(struct nfslockfile *lfp)
6138 /* lf_usecount ensures *lfp won't be free'd */
6141 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL,
6142 NFSSTATEMUTEXPTR, NULL);
6143 } while (gotlock == 0);
6148 * Unlock the struct nfslockfile after local lock updating.
6151 nfsrv_unlocklf(struct nfslockfile *lfp)
6154 nfsv4_unlock(&lfp->lf_locallock_lck, 0);
6158 * Clear out all state for the NFSv4 server.
6159 * Must be called by a thread that can sleep when no nfsds are running.
6162 nfsrv_throwawayallstate(NFSPROC_T *p)
6164 struct nfsclient *clp, *nclp;
6165 struct nfslockfile *lfp, *nlfp;
6169 * For each client, clean out the state and then free the structure.
6171 for (i = 0; i < nfsrv_clienthashsize; i++) {
6172 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) {
6173 nfsrv_cleanclient(clp, p);
6174 nfsrv_freedeleglist(&clp->lc_deleg);
6175 nfsrv_freedeleglist(&clp->lc_olddeleg);
6176 free(clp->lc_stateid, M_NFSDCLIENT);
6177 free(clp, M_NFSDCLIENT);
6182 * Also, free up any remaining lock file structures.
6184 for (i = 0; i < nfsrv_lockhashsize; i++) {
6185 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) {
6186 printf("nfsd unload: fnd a lock file struct\n");
6187 nfsrv_freenfslockfile(lfp);
6191 /* And get rid of the deviceid structures and layouts. */
6192 nfsrv_freealllayoutsanddevids();
6196 * Check the sequence# for the session and slot provided as an argument.
6197 * Also, renew the lease if the session will return NFS_OK.
6200 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid,
6201 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this,
6202 uint32_t *sflagsp, NFSPROC_T *p)
6204 struct nfsdsession *sep;
6205 struct nfssessionhash *shp;
6209 shp = NFSSESSIONHASH(nd->nd_sessionid);
6210 NFSLOCKSESSION(shp);
6211 sep = nfsrv_findsession(nd->nd_sessionid);
6213 NFSUNLOCKSESSION(shp);
6214 return (NFSERR_BADSESSION);
6216 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp,
6217 sep->sess_slots, NULL, NFSV4_SLOTS - 1);
6219 NFSUNLOCKSESSION(shp);
6222 if (cache_this != 0)
6223 nd->nd_flag |= ND_SAVEREPLY;
6224 /* Renew the lease. */
6225 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry();
6226 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval;
6227 nd->nd_flag |= ND_IMPLIEDCLID;
6229 /* Save maximum request and reply sizes. */
6230 nd->nd_maxreq = sep->sess_maxreq;
6231 nd->nd_maxresp = sep->sess_maxresp;
6234 * If this session handles the backchannel, save the nd_xprt for this
6235 * RPC, since this is the one being used.
6236 * RFC-5661 specifies that the fore channel will be implicitly
6237 * bound by a Sequence operation. However, since some NFSv4.1 clients
6238 * erroneously assumed that the back channel would be implicitly
6239 * bound as well, do the implicit binding unless a
6240 * BindConnectiontoSession has already been done on the session.
6243 if (sep->sess_clp->lc_req.nr_client != NULL &&
6244 sep->sess_cbsess.nfsess_xprt != nd->nd_xprt &&
6245 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0 &&
6246 (sep->sess_clp->lc_flags & LCL_DONEBINDCONN) == 0) {
6248 "nfsrv_checksequence: implicit back channel bind\n");
6249 savxprt = sep->sess_cbsess.nfsess_xprt;
6250 SVC_ACQUIRE(nd->nd_xprt);
6251 nd->nd_xprt->xp_p2 =
6252 sep->sess_clp->lc_req.nr_client->cl_private;
6253 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */
6254 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
6258 if (sep->sess_clp->lc_req.nr_client == NULL)
6259 *sflagsp |= NFSV4SEQ_CBPATHDOWN;
6260 NFSUNLOCKSESSION(shp);
6261 if (savxprt != NULL)
6262 SVC_RELEASE(savxprt);
6263 if (error == NFSERR_EXPIRED) {
6264 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED;
6266 } else if (error == NFSERR_ADMINREVOKED) {
6267 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED;
6270 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1;
6275 * Check/set reclaim complete for this session/clientid.
6278 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs)
6280 struct nfsdsession *sep;
6281 struct nfssessionhash *shp;
6284 shp = NFSSESSIONHASH(nd->nd_sessionid);
6286 NFSLOCKSESSION(shp);
6287 sep = nfsrv_findsession(nd->nd_sessionid);
6289 NFSUNLOCKSESSION(shp);
6291 return (NFSERR_BADSESSION);
6295 sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS;
6296 /* Check to see if reclaim complete has already happened. */
6297 else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0)
6298 error = NFSERR_COMPLETEALREADY;
6300 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE;
6301 nfsrv_markreclaim(sep->sess_clp);
6303 NFSUNLOCKSESSION(shp);
6309 * Cache the reply in a session slot.
6312 nfsrv_cache_session(struct nfsrv_descript *nd, struct mbuf **m)
6314 struct nfsdsession *sep;
6315 struct nfssessionhash *shp;
6318 struct sockaddr_in *sin;
6321 struct sockaddr_in6 *sin6;
6324 shp = NFSSESSIONHASH(nd->nd_sessionid);
6325 NFSLOCKSESSION(shp);
6326 sep = nfsrv_findsession(nd->nd_sessionid);
6328 NFSUNLOCKSESSION(shp);
6329 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) {
6330 buf = malloc(INET6_ADDRSTRLEN, M_TEMP, M_WAITOK);
6331 switch (nd->nd_nam->sa_family) {
6334 sin = (struct sockaddr_in *)nd->nd_nam;
6335 cp = inet_ntop(sin->sin_family,
6336 &sin->sin_addr.s_addr, buf,
6342 sin6 = (struct sockaddr_in6 *)nd->nd_nam;
6343 cp = inet_ntop(sin6->sin6_family,
6344 &sin6->sin6_addr, buf, INET6_ADDRSTRLEN);
6351 printf("nfsrv_cache_session: no session "
6354 printf("nfsrv_cache_session: no session\n");
6360 nfsv4_seqsess_cacherep(nd->nd_slotid, sep->sess_slots, nd->nd_repstat,
6362 NFSUNLOCKSESSION(shp);
6366 * Search for a session that matches the sessionid.
6368 static struct nfsdsession *
6369 nfsrv_findsession(uint8_t *sessionid)
6371 struct nfsdsession *sep;
6372 struct nfssessionhash *shp;
6374 shp = NFSSESSIONHASH(sessionid);
6375 LIST_FOREACH(sep, &shp->list, sess_hash) {
6376 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID))
6383 * Destroy a session.
6386 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid)
6388 int error, igotlock, samesess;
6391 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) &&
6392 (nd->nd_flag & ND_HASSEQUENCE) != 0) {
6394 if ((nd->nd_flag & ND_LASTOP) == 0)
6395 return (NFSERR_BADSESSION);
6398 /* Lock out other nfsd threads */
6399 NFSLOCKV4ROOTMUTEX();
6400 nfsv4_relref(&nfsv4rootfs_lock);
6402 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
6403 NFSV4ROOTLOCKMUTEXPTR, NULL);
6404 } while (igotlock == 0);
6405 NFSUNLOCKV4ROOTMUTEX();
6407 error = nfsrv_freesession(NULL, sessionid);
6408 if (error == 0 && samesess != 0)
6409 nd->nd_flag &= ~ND_HASSEQUENCE;
6411 NFSLOCKV4ROOTMUTEX();
6412 nfsv4_unlock(&nfsv4rootfs_lock, 1);
6413 NFSUNLOCKV4ROOTMUTEX();
6418 * Bind a connection to a session.
6419 * For now, only certain variants are supported, since the current session
6420 * structure can only handle a single backchannel entry, which will be
6421 * applied to all connections if it is set.
6424 nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp)
6426 struct nfssessionhash *shp;
6427 struct nfsdsession *sep;
6428 struct nfsclient *clp;
6434 shp = NFSSESSIONHASH(sessionid);
6436 NFSLOCKSESSION(shp);
6437 sep = nfsrv_findsession(sessionid);
6439 clp = sep->sess_clp;
6440 if (*foreaftp == NFSCDFC4_BACK ||
6441 *foreaftp == NFSCDFC4_BACK_OR_BOTH ||
6442 *foreaftp == NFSCDFC4_FORE_OR_BOTH) {
6443 /* Try to set up a backchannel. */
6444 if (clp->lc_req.nr_client == NULL) {
6445 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire "
6447 clp->lc_req.nr_client = (struct __rpc_client *)
6448 clnt_bck_create(nd->nd_xprt->xp_socket,
6449 sep->sess_cbprogram, NFSV4_CBVERS);
6451 if (clp->lc_req.nr_client != NULL) {
6452 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up "
6454 savxprt = sep->sess_cbsess.nfsess_xprt;
6455 SVC_ACQUIRE(nd->nd_xprt);
6456 nd->nd_xprt->xp_p2 =
6457 clp->lc_req.nr_client->cl_private;
6458 /* Disable idle timeout. */
6459 nd->nd_xprt->xp_idletimeout = 0;
6460 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
6461 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN;
6462 clp->lc_flags |= LCL_DONEBINDCONN;
6463 if (*foreaftp == NFSCDFS4_BACK)
6464 *foreaftp = NFSCDFS4_BACK;
6466 *foreaftp = NFSCDFS4_BOTH;
6467 } else if (*foreaftp != NFSCDFC4_BACK) {
6468 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set "
6469 "up backchannel\n");
6470 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN;
6471 clp->lc_flags |= LCL_DONEBINDCONN;
6472 *foreaftp = NFSCDFS4_FORE;
6474 error = NFSERR_NOTSUPP;
6475 printf("nfsrv_bindconnsess: Can't add "
6479 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n");
6480 clp->lc_flags |= LCL_DONEBINDCONN;
6481 *foreaftp = NFSCDFS4_FORE;
6484 error = NFSERR_BADSESSION;
6485 NFSUNLOCKSESSION(shp);
6487 if (savxprt != NULL)
6488 SVC_RELEASE(savxprt);
6493 * Free up a session structure.
6496 nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid)
6498 struct nfssessionhash *shp;
6503 shp = NFSSESSIONHASH(sessionid);
6504 NFSLOCKSESSION(shp);
6505 sep = nfsrv_findsession(sessionid);
6507 shp = NFSSESSIONHASH(sep->sess_sessionid);
6508 NFSLOCKSESSION(shp);
6512 if (sep->sess_refcnt > 0) {
6513 NFSUNLOCKSESSION(shp);
6515 return (NFSERR_BACKCHANBUSY);
6517 LIST_REMOVE(sep, sess_hash);
6518 LIST_REMOVE(sep, sess_list);
6520 NFSUNLOCKSESSION(shp);
6523 return (NFSERR_BADSESSION);
6524 for (i = 0; i < NFSV4_SLOTS; i++)
6525 if (sep->sess_slots[i].nfssl_reply != NULL)
6526 m_freem(sep->sess_slots[i].nfssl_reply);
6527 if (sep->sess_cbsess.nfsess_xprt != NULL)
6528 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt);
6529 free(sep, M_NFSDSESSION);
6535 * RFC5661 says that it should fail when there are associated opens, locks
6536 * or delegations. Since stateids represent opens, I don't see how you can
6537 * free an open stateid (it will be free'd when closed), so this function
6538 * only works for lock stateids (freeing the lock_owner) or delegations.
6541 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp,
6544 struct nfsclient *clp;
6545 struct nfsstate *stp;
6550 * Look up the stateid
6552 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
6553 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
6555 /* First, check for a delegation. */
6556 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
6557 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
6562 nfsrv_freedeleg(stp);
6567 /* Not a delegation, try for a lock_owner. */
6569 error = nfsrv_getstate(clp, stateidp, 0, &stp);
6570 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD |
6571 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0))
6572 /* Not a lock_owner stateid. */
6573 error = NFSERR_LOCKSHELD;
6574 if (error == 0 && !LIST_EMPTY(&stp->ls_lock))
6575 error = NFSERR_LOCKSHELD;
6577 nfsrv_freelockowner(stp, NULL, 0, p);
6586 nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp,
6589 struct nfsclient *clp;
6590 struct nfsstate *stp;
6595 * Look up the stateid
6597 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
6598 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
6600 error = nfsrv_getstate(clp, stateidp, 0, &stp);
6601 if (error == 0 && stateidp->seqid != 0 &&
6602 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid))
6603 error = NFSERR_OLDSTATEID;
6609 * Generate the xdr for an NFSv4.1 CBSequence Operation.
6612 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
6613 int dont_replycache, struct nfsdsession **sepp)
6615 struct nfsdsession *sep;
6616 uint32_t *tl, slotseq = 0;
6617 int maxslot, slotpos;
6618 uint8_t sessionid[NFSX_V4SESSIONID];
6621 error = nfsv4_getcbsession(clp, sepp);
6625 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot,
6626 &slotseq, sessionid);
6627 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot"));
6629 /* Build the Sequence arguments. */
6630 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED);
6631 bcopy(sessionid, tl, NFSX_V4SESSIONID);
6632 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
6633 nd->nd_slotseq = tl;
6634 *tl++ = txdr_unsigned(slotseq);
6635 *tl++ = txdr_unsigned(slotpos);
6636 *tl++ = txdr_unsigned(maxslot);
6637 if (dont_replycache == 0)
6638 *tl++ = newnfs_true;
6640 *tl++ = newnfs_false;
6641 *tl = 0; /* No referring call list, for now. */
6642 nd->nd_flag |= ND_HASSEQUENCE;
6647 * Get a session for the callback.
6650 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp)
6652 struct nfsdsession *sep;
6655 LIST_FOREACH(sep, &clp->lc_session, sess_list) {
6656 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0)
6661 return (NFSERR_BADSESSION);
6670 * Free up all backchannel xprts. This needs to be done when the nfsd threads
6671 * exit, since those transports will all be going away.
6672 * This is only called after all the nfsd threads are done performing RPCs,
6673 * so locking shouldn't be an issue.
6676 nfsrv_freeallbackchannel_xprts(void)
6678 struct nfsdsession *sep;
6679 struct nfsclient *clp;
6683 for (i = 0; i < nfsrv_clienthashsize; i++) {
6684 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) {
6685 LIST_FOREACH(sep, &clp->lc_session, sess_list) {
6686 xprt = sep->sess_cbsess.nfsess_xprt;
6687 sep->sess_cbsess.nfsess_xprt = NULL;
6696 * Do a layout commit. Actually just call nfsrv_updatemdsattr().
6697 * I have no idea if the rest of these arguments will ever be useful?
6700 nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype,
6701 int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len,
6702 int hasnewmtime, struct timespec *newmtimep, int reclaim,
6703 nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep,
6704 uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p)
6709 error = nfsrv_updatemdsattr(vp, &na, p);
6712 *newsizep = na.na_size;
6718 * Try and get a layout.
6721 nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp,
6722 int layouttype, int *iomode, uint64_t *offset, uint64_t *len,
6723 uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose,
6724 int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p)
6726 struct nfslayouthash *lhyp;
6727 struct nfslayout *lyp;
6729 fhandle_t fh, *dsfhp;
6730 int error, mirrorcnt;
6732 if (nfsrv_devidcnt == 0)
6733 return (NFSERR_UNKNLAYOUTTYPE);
6736 printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset,
6738 error = nfsvno_getfh(vp, &fh, p);
6739 NFSD_DEBUG(4, "layoutget getfh=%d\n", error);
6744 * For now, all layouts are for entire files.
6745 * Only issue Read/Write layouts if requested for a non-readonly fs.
6747 if (NFSVNO_EXRDONLY(exp)) {
6748 if (*iomode == NFSLAYOUTIOMODE_RW)
6749 return (NFSERR_LAYOUTTRYLATER);
6750 *iomode = NFSLAYOUTIOMODE_READ;
6752 if (*iomode != NFSLAYOUTIOMODE_RW)
6753 *iomode = NFSLAYOUTIOMODE_READ;
6756 * Check to see if a write layout can be issued for this file.
6757 * This is used during mirror recovery to avoid RW layouts being
6758 * issued for a file while it is being copied to the recovered
6761 if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0)
6762 return (NFSERR_LAYOUTTRYLATER);
6768 /* First, see if a layout already exists and return if found. */
6769 lhyp = NFSLAYOUTHASH(&fh);
6770 NFSLOCKLAYOUT(lhyp);
6771 error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp);
6772 NFSD_DEBUG(4, "layoutget findlay=%d\n", error);
6774 * Not sure if the seqid must be the same, so I won't check it.
6776 if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] ||
6777 stateidp->other[1] != lyp->lay_stateid.other[1] ||
6778 stateidp->other[2] != lyp->lay_stateid.other[2])) {
6779 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) {
6780 NFSUNLOCKLAYOUT(lhyp);
6781 NFSD_DEBUG(1, "ret bad stateid\n");
6782 return (NFSERR_BADSTATEID);
6785 * I believe we get here because there is a race between
6786 * the client processing the CBLAYOUTRECALL and the layout
6787 * being deleted here on the server.
6788 * The client has now done a LayoutGet with a non-layout
6789 * stateid, as it would when there is no layout.
6790 * As such, free this layout and set error == NFSERR_BADSTATEID
6791 * so the code below will create a new layout structure as
6792 * would happen if no layout was found.
6793 * "lyp" will be set before being used below, but set it NULL
6796 nfsrv_freelayout(&lhyp->list, lyp);
6798 error = NFSERR_BADSTATEID;
6801 if (lyp->lay_layoutlen > maxcnt) {
6802 NFSUNLOCKLAYOUT(lhyp);
6803 NFSD_DEBUG(1, "ret layout too small\n");
6804 return (NFSERR_TOOSMALL);
6806 if (*iomode == NFSLAYOUTIOMODE_RW)
6807 lyp->lay_flags |= NFSLAY_RW;
6809 lyp->lay_flags |= NFSLAY_READ;
6810 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen);
6811 *layoutlenp = lyp->lay_layoutlen;
6812 if (++lyp->lay_stateid.seqid == 0)
6813 lyp->lay_stateid.seqid = 1;
6814 stateidp->seqid = lyp->lay_stateid.seqid;
6815 NFSUNLOCKLAYOUT(lhyp);
6816 NFSD_DEBUG(4, "ret fnd layout\n");
6819 NFSUNLOCKLAYOUT(lhyp);
6821 /* Find the device id and file handle. */
6822 dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK);
6823 devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK);
6824 error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid);
6825 NFSD_DEBUG(4, "layoutget devandfh=%d\n", error);
6827 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) {
6828 if (NFSX_V4FILELAYOUT > maxcnt)
6829 error = NFSERR_TOOSMALL;
6831 lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp,
6832 devid, vp->v_mount->mnt_stat.f_fsid);
6834 if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt)
6835 error = NFSERR_TOOSMALL;
6837 lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt,
6839 vp->v_mount->mnt_stat.f_fsid);
6842 free(dsfhp, M_TEMP);
6843 free(devid, M_TEMP);
6848 * Now, add this layout to the list.
6850 error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p);
6851 NFSD_DEBUG(4, "layoutget addl=%d\n", error);
6853 * The lyp will be set to NULL by nfsrv_addlayout() if it
6854 * linked the new structure into the lists.
6856 free(lyp, M_NFSDSTATE);
6861 * Generate a File Layout.
6863 static struct nfslayout *
6864 nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp,
6865 fhandle_t *dsfhp, char *devid, fsid_t fs)
6868 struct nfslayout *lyp;
6869 uint64_t pattern_offset;
6871 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE,
6873 lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES;
6874 if (iomode == NFSLAYOUTIOMODE_RW)
6875 lyp->lay_flags = NFSLAY_RW;
6877 lyp->lay_flags = NFSLAY_READ;
6878 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp));
6879 lyp->lay_clientid.qval = nd->nd_clientid.qval;
6882 /* Fill in the xdr for the files layout. */
6883 tl = (uint32_t *)lyp->lay_xdr;
6884 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */
6885 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
6888 * Make the stripe size as many 64K blocks as will fit in the stripe
6889 * mask. Since there is only one stripe, the stripe size doesn't really
6890 * matter, except that the Linux client will only handle an exact
6891 * multiple of their PAGE_SIZE (usually 4K). I chose 64K as a value
6892 * that should cover most/all arches w.r.t. PAGE_SIZE.
6894 *tl++ = txdr_unsigned(NFSFLAYUTIL_STRIPE_MASK & ~0xffff);
6895 *tl++ = 0; /* 1st stripe index. */
6897 txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */
6898 *tl++ = txdr_unsigned(1); /* 1 file handle. */
6899 *tl++ = txdr_unsigned(NFSX_V4PNFSFH);
6900 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp));
6901 lyp->lay_layoutlen = NFSX_V4FILELAYOUT;
6905 #define FLEX_OWNERID "999"
6906 #define FLEX_UID0 "0"
6908 * Generate a Flex File Layout.
6909 * The FLEX_OWNERID can be any string of 3 decimal digits. Although this
6910 * string goes on the wire, it isn't supposed to be used by the client,
6911 * since this server uses tight coupling.
6912 * Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use
6913 * a string of "0". This works around the Linux Flex File Layout driver bug
6914 * which uses the synthetic uid/gid strings for the "tightly coupled" case.
6916 static struct nfslayout *
6917 nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt,
6918 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs)
6921 struct nfslayout *lyp;
6925 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt),
6926 M_NFSDSTATE, M_WAITOK | M_ZERO);
6927 lyp->lay_type = NFSLAYOUT_FLEXFILE;
6928 if (iomode == NFSLAYOUTIOMODE_RW)
6929 lyp->lay_flags = NFSLAY_RW;
6931 lyp->lay_flags = NFSLAY_READ;
6932 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp));
6933 lyp->lay_clientid.qval = nd->nd_clientid.qval;
6935 lyp->lay_mirrorcnt = mirrorcnt;
6937 /* Fill in the xdr for the files layout. */
6938 tl = (uint32_t *)lyp->lay_xdr;
6940 txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */
6941 *tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */
6942 for (i = 0; i < mirrorcnt; i++) {
6943 *tl++ = txdr_unsigned(1); /* One stripe. */
6944 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */
6945 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
6946 devid += NFSX_V4DEVICEID;
6947 *tl++ = txdr_unsigned(1); /* Efficiency. */
6948 *tl++ = 0; /* Proxy Stateid. */
6952 *tl++ = txdr_unsigned(1); /* 1 file handle. */
6953 *tl++ = txdr_unsigned(NFSX_V4PNFSFH);
6954 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp));
6955 tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED);
6957 if (nfsrv_flexlinuxhack != 0) {
6958 *tl++ = txdr_unsigned(strlen(FLEX_UID0));
6959 *tl = 0; /* 0 pad string. */
6960 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0));
6961 *tl++ = txdr_unsigned(strlen(FLEX_UID0));
6962 *tl = 0; /* 0 pad string. */
6963 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0));
6965 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID));
6966 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED);
6967 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID));
6968 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED);
6971 *tl++ = txdr_unsigned(0); /* ff_flags. */
6972 *tl = txdr_unsigned(60); /* Status interval hint. */
6973 lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt);
6978 * Parse and process Flex File errors returned via LayoutReturn.
6981 nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt,
6985 int cnt, errcnt, i, j, opnum, stat;
6986 char devid[NFSX_V4DEVICEID];
6989 cnt = fxdr_unsigned(int, *tl++);
6990 NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt);
6991 for (i = 0; i < cnt; i++) {
6992 /* Skip offset, length and stateid for now. */
6993 tl += (4 + NFSX_STATEID / NFSX_UNSIGNED);
6994 errcnt = fxdr_unsigned(int, *tl++);
6995 NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt);
6996 for (j = 0; j < errcnt; j++) {
6997 NFSBCOPY(tl, devid, NFSX_V4DEVICEID);
6998 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
6999 stat = fxdr_unsigned(int, *tl++);
7000 opnum = fxdr_unsigned(int, *tl++);
7001 NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum,
7004 * Except for NFSERR_ACCES and NFSERR_STALE errors,
7005 * disable the mirror.
7007 if (stat != NFSERR_ACCES && stat != NFSERR_STALE)
7008 nfsrv_delds(devid, p);
7014 * This function removes all flex file layouts which has a mirror with
7015 * a device id that matches the argument.
7016 * Called when the DS represented by the device id has failed.
7019 nfsrv_flexmirrordel(char *devid, NFSPROC_T *p)
7022 struct nfslayout *lyp, *nlyp;
7023 struct nfslayouthash *lhyp;
7024 struct nfslayouthead loclyp;
7027 NFSD_DEBUG(4, "flexmirrordel\n");
7028 /* Move all layouts found onto a local list. */
7029 TAILQ_INIT(&loclyp);
7030 for (i = 0; i < nfsrv_layouthashsize; i++) {
7031 lhyp = &nfslayouthash[i];
7032 NFSLOCKLAYOUT(lhyp);
7033 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
7034 if (lyp->lay_type == NFSLAYOUT_FLEXFILE &&
7035 lyp->lay_mirrorcnt > 1) {
7036 NFSD_DEBUG(4, "possible match\n");
7039 for (j = 0; j < lyp->lay_mirrorcnt; j++) {
7041 if (NFSBCMP(devid, tl, NFSX_V4DEVICEID)
7044 NFSD_DEBUG(4, "fnd one\n");
7045 TAILQ_REMOVE(&lhyp->list, lyp,
7047 TAILQ_INSERT_HEAD(&loclyp, lyp,
7051 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED +
7052 NFSM_RNDUP(NFSX_V4PNFSFH) /
7053 NFSX_UNSIGNED + 11 * NFSX_UNSIGNED);
7057 NFSUNLOCKLAYOUT(lhyp);
7060 /* Now, try to do a Layout recall for each one found. */
7061 TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) {
7062 NFSD_DEBUG(4, "do layout recall\n");
7064 * The layout stateid.seqid needs to be incremented
7065 * before doing a LAYOUT_RECALL callback.
7067 if (++lyp->lay_stateid.seqid == 0)
7068 lyp->lay_stateid.seqid = 1;
7069 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid,
7070 &lyp->lay_fh, lyp, 1, lyp->lay_type, p);
7071 nfsrv_freelayout(&loclyp, lyp);
7076 * Do a recall callback to the client for this layout.
7079 nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp,
7080 struct nfslayout *lyp, int changed, int laytype, NFSPROC_T *p)
7082 struct nfsclient *clp;
7085 NFSD_DEBUG(4, "nfsrv_recalllayout\n");
7086 error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0),
7088 NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error);
7090 printf("nfsrv_recalllayout: getclient err=%d\n", error);
7093 if ((clp->lc_flags & LCL_NFSV41) != 0) {
7094 error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL,
7095 stateidp, changed, fhp, NULL, NULL, laytype, p);
7096 /* If lyp != NULL, handle an error return here. */
7097 if (error != 0 && lyp != NULL) {
7100 * Mark it returned, since no layout recall
7102 * All errors seem to be non-recoverable, although
7103 * NFSERR_NOMATCHLAYOUT is a normal event.
7105 if ((lyp->lay_flags & NFSLAY_RECALL) != 0) {
7106 lyp->lay_flags |= NFSLAY_RETURNED;
7110 if (error != NFSERR_NOMATCHLAYOUT)
7111 printf("nfsrv_recalllayout: err=%d\n", error);
7114 printf("nfsrv_recalllayout: clp not NFSv4.1\n");
7119 * Find a layout to recall when we exceed our high water mark.
7122 nfsrv_recalloldlayout(NFSPROC_T *p)
7124 struct nfslayouthash *lhyp;
7125 struct nfslayout *lyp;
7127 nfsv4stateid_t stateid;
7129 int error, laytype = 0, ret;
7131 lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize];
7132 NFSLOCKLAYOUT(lhyp);
7133 TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) {
7134 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) {
7135 lyp->lay_flags |= NFSLAY_CALLB;
7137 * The layout stateid.seqid needs to be incremented
7138 * before doing a LAYOUT_RECALL callback.
7140 if (++lyp->lay_stateid.seqid == 0)
7141 lyp->lay_stateid.seqid = 1;
7142 clientid = lyp->lay_clientid;
7143 stateid = lyp->lay_stateid;
7144 NFSBCOPY(&lyp->lay_fh, &fh, sizeof(fh));
7145 laytype = lyp->lay_type;
7149 NFSUNLOCKLAYOUT(lhyp);
7151 error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, 0,
7153 if (error != 0 && error != NFSERR_NOMATCHLAYOUT)
7154 NFSD_DEBUG(4, "recallold=%d\n", error);
7156 NFSLOCKLAYOUT(lhyp);
7158 * Since the hash list was unlocked, we need to
7161 ret = nfsrv_findlayout(&clientid, &fh, laytype, p,
7164 (lyp->lay_flags & NFSLAY_CALLB) != 0 &&
7165 lyp->lay_stateid.other[0] == stateid.other[0] &&
7166 lyp->lay_stateid.other[1] == stateid.other[1] &&
7167 lyp->lay_stateid.other[2] == stateid.other[2]) {
7169 * The client no longer knows this layout, so
7170 * it can be free'd now.
7172 if (error == NFSERR_NOMATCHLAYOUT)
7173 nfsrv_freelayout(&lhyp->list, lyp);
7176 * Leave it to be tried later by
7177 * clearing NFSLAY_CALLB and moving
7178 * it to the head of the list, so it
7179 * won't be tried again for a while.
7181 lyp->lay_flags &= ~NFSLAY_CALLB;
7182 TAILQ_REMOVE(&lhyp->list, lyp,
7184 TAILQ_INSERT_HEAD(&lhyp->list, lyp,
7188 NFSUNLOCKLAYOUT(lhyp);
7194 * Try and return layout(s).
7197 nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp,
7198 int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim,
7199 int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp,
7200 struct ucred *cred, NFSPROC_T *p)
7203 struct nfslayouthash *lhyp;
7204 struct nfslayout *lyp;
7209 if (kind == NFSV4LAYOUTRET_FILE) {
7210 error = nfsvno_getfh(vp, &fh, p);
7212 error = nfsrv_updatemdsattr(vp, &na, p);
7214 printf("nfsrv_layoutreturn: updatemdsattr"
7215 " failed=%d\n", error);
7218 if (reclaim == newnfs_true) {
7219 error = nfsrv_checkgrace(NULL, NULL,
7221 if (error != NFSERR_NOGRACE)
7225 lhyp = NFSLAYOUTHASH(&fh);
7227 NFSLOCKLAYOUT(lhyp);
7228 error = nfsrv_findlayout(&nd->nd_clientid, &fh,
7229 layouttype, p, &lyp);
7230 NFSD_DEBUG(4, "layoutret findlay=%d\n", error);
7232 stateidp->other[0] == lyp->lay_stateid.other[0] &&
7233 stateidp->other[1] == lyp->lay_stateid.other[1] &&
7234 stateidp->other[2] == lyp->lay_stateid.other[2]) {
7235 NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d"
7236 " %x %x %x laystateid %d %x %x %x"
7237 " off=%ju len=%ju flgs=0x%x\n",
7238 stateidp->seqid, stateidp->other[0],
7239 stateidp->other[1], stateidp->other[2],
7240 lyp->lay_stateid.seqid,
7241 lyp->lay_stateid.other[0],
7242 lyp->lay_stateid.other[1],
7243 lyp->lay_stateid.other[2],
7244 (uintmax_t)offset, (uintmax_t)len,
7246 if (++lyp->lay_stateid.seqid == 0)
7247 lyp->lay_stateid.seqid = 1;
7248 stateidp->seqid = lyp->lay_stateid.seqid;
7249 if (offset == 0 && len == UINT64_MAX) {
7250 if ((iomode & NFSLAYOUTIOMODE_READ) !=
7252 lyp->lay_flags &= ~NFSLAY_READ;
7253 if ((iomode & NFSLAYOUTIOMODE_RW) != 0)
7254 lyp->lay_flags &= ~NFSLAY_RW;
7255 if ((lyp->lay_flags & (NFSLAY_READ |
7257 nfsrv_freelayout(&lhyp->list,
7264 NFSUNLOCKLAYOUT(lhyp);
7265 /* Search the nfsrv_recalllist for a match. */
7266 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
7267 if (NFSBCMP(&lyp->lay_fh, &fh,
7269 lyp->lay_clientid.qval ==
7270 nd->nd_clientid.qval &&
7271 stateidp->other[0] ==
7272 lyp->lay_stateid.other[0] &&
7273 stateidp->other[1] ==
7274 lyp->lay_stateid.other[1] &&
7275 stateidp->other[2] ==
7276 lyp->lay_stateid.other[2]) {
7277 lyp->lay_flags |= NFSLAY_RETURNED;
7284 if (layouttype == NFSLAYOUT_FLEXFILE)
7285 nfsrv_flexlayouterr(nd, layp, maxcnt, p);
7286 } else if (kind == NFSV4LAYOUTRET_FSID)
7287 nfsrv_freelayouts(&nd->nd_clientid,
7288 &vp->v_mount->mnt_stat.f_fsid, layouttype, iomode);
7289 else if (kind == NFSV4LAYOUTRET_ALL)
7290 nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode);
7292 error = NFSERR_INVAL;
7299 * Look for an existing layout.
7302 nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype,
7303 NFSPROC_T *p, struct nfslayout **lypp)
7305 struct nfslayouthash *lhyp;
7306 struct nfslayout *lyp;
7311 lhyp = NFSLAYOUTHASH(fhp);
7312 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) {
7313 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 &&
7314 lyp->lay_clientid.qval == clientidp->qval &&
7315 lyp->lay_type == laytype)
7326 * Add the new layout, as required.
7329 nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp,
7330 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p)
7332 struct nfsclient *clp;
7333 struct nfslayouthash *lhyp;
7334 struct nfslayout *lyp, *nlyp;
7338 KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0,
7339 ("nfsrv_layoutget: no nd_clientid\n"));
7343 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
7344 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
7349 lyp->lay_stateid.seqid = stateidp->seqid = 1;
7350 lyp->lay_stateid.other[0] = stateidp->other[0] =
7351 clp->lc_clientid.lval[0];
7352 lyp->lay_stateid.other[1] = stateidp->other[1] =
7353 clp->lc_clientid.lval[1];
7354 lyp->lay_stateid.other[2] = stateidp->other[2] =
7355 nfsrv_nextstateindex(clp);
7358 lhyp = NFSLAYOUTHASH(fhp);
7359 NFSLOCKLAYOUT(lhyp);
7360 TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) {
7361 if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 &&
7362 nlyp->lay_clientid.qval == nd->nd_clientid.qval)
7366 /* A layout already exists, so use it. */
7367 nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW));
7368 NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen);
7369 *layoutlenp = nlyp->lay_layoutlen;
7370 if (++nlyp->lay_stateid.seqid == 0)
7371 nlyp->lay_stateid.seqid = 1;
7372 stateidp->seqid = nlyp->lay_stateid.seqid;
7373 stateidp->other[0] = nlyp->lay_stateid.other[0];
7374 stateidp->other[1] = nlyp->lay_stateid.other[1];
7375 stateidp->other[2] = nlyp->lay_stateid.other[2];
7376 NFSUNLOCKLAYOUT(lhyp);
7380 /* Insert the new layout in the lists. */
7382 atomic_add_int(&nfsrv_layoutcnt, 1);
7383 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen);
7384 *layoutlenp = lyp->lay_layoutlen;
7385 TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list);
7386 NFSUNLOCKLAYOUT(lhyp);
7391 * Get the devinfo for a deviceid.
7394 nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt,
7395 uint32_t *notify, int *devaddrlen, char **devaddr)
7397 struct nfsdevice *ds;
7399 if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype !=
7400 NFSLAYOUT_FLEXFILE) ||
7401 (nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES))
7402 return (NFSERR_UNKNLAYOUTTYPE);
7405 * Now, search for the device id. Note that the structures won't go
7406 * away, but the order changes in the list. As such, the lock only
7407 * needs to be held during the search through the list.
7410 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
7411 if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 &&
7412 ds->nfsdev_nmp != NULL)
7417 return (NFSERR_NOENT);
7419 /* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */
7421 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) {
7422 *devaddrlen = ds->nfsdev_fileaddrlen;
7423 *devaddr = ds->nfsdev_fileaddr;
7424 } else if (layouttype == NFSLAYOUT_FLEXFILE) {
7425 *devaddrlen = ds->nfsdev_flexaddrlen;
7426 *devaddr = ds->nfsdev_flexaddr;
7428 if (*devaddrlen == 0)
7429 return (NFSERR_UNKNLAYOUTTYPE);
7432 * The XDR overhead is 3 unsigned values: layout_type,
7433 * length_of_address and notify bitmap.
7434 * If the notify array is changed to not all zeros, the
7435 * count of unsigned values must be increased.
7437 if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) +
7438 3 * NFSX_UNSIGNED) {
7439 *maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED;
7440 return (NFSERR_TOOSMALL);
7446 * Free a list of layout state structures.
7449 nfsrv_freelayoutlist(nfsquad_t clientid)
7451 struct nfslayouthash *lhyp;
7452 struct nfslayout *lyp, *nlyp;
7455 for (i = 0; i < nfsrv_layouthashsize; i++) {
7456 lhyp = &nfslayouthash[i];
7457 NFSLOCKLAYOUT(lhyp);
7458 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
7459 if (lyp->lay_clientid.qval == clientid.qval)
7460 nfsrv_freelayout(&lhyp->list, lyp);
7462 NFSUNLOCKLAYOUT(lhyp);
7470 nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp)
7473 NFSD_DEBUG(4, "Freelayout=%p\n", lyp);
7474 atomic_add_int(&nfsrv_layoutcnt, -1);
7475 TAILQ_REMOVE(lhp, lyp, lay_list);
7476 free(lyp, M_NFSDSTATE);
7480 * Free up a device id.
7483 nfsrv_freeonedevid(struct nfsdevice *ds)
7487 atomic_add_int(&nfsrv_devidcnt, -1);
7488 vrele(ds->nfsdev_dvp);
7489 for (i = 0; i < nfsrv_dsdirsize; i++)
7490 if (ds->nfsdev_dsdir[i] != NULL)
7491 vrele(ds->nfsdev_dsdir[i]);
7492 free(ds->nfsdev_fileaddr, M_NFSDSTATE);
7493 free(ds->nfsdev_flexaddr, M_NFSDSTATE);
7494 free(ds->nfsdev_host, M_NFSDSTATE);
7495 free(ds, M_NFSDSTATE);
7499 * Free up a device id and its mirrors.
7502 nfsrv_freedevid(struct nfsdevice *ds)
7505 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list);
7506 nfsrv_freeonedevid(ds);
7510 * Free all layouts and device ids.
7511 * Done when the nfsd threads are shut down since there may be a new
7512 * modified device id list created when the nfsd is restarted.
7515 nfsrv_freealllayoutsanddevids(void)
7517 struct nfsdontlist *mrp, *nmrp;
7518 struct nfslayout *lyp, *nlyp;
7520 /* Get rid of the deviceid structures. */
7521 nfsrv_freealldevids();
7522 TAILQ_INIT(&nfsrv_devidhead);
7525 /* Get rid of all layouts. */
7526 nfsrv_freealllayouts();
7528 /* Get rid of any nfsdontlist entries. */
7529 LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp)
7530 free(mrp, M_NFSDSTATE);
7531 LIST_INIT(&nfsrv_dontlisthead);
7532 nfsrv_dontlistlen = 0;
7534 /* Free layouts in the recall list. */
7535 TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp)
7536 nfsrv_freelayout(&nfsrv_recalllisthead, lyp);
7537 TAILQ_INIT(&nfsrv_recalllisthead);
7541 * Free layouts that match the arguments.
7544 nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode)
7546 struct nfslayouthash *lhyp;
7547 struct nfslayout *lyp, *nlyp;
7550 for (i = 0; i < nfsrv_layouthashsize; i++) {
7551 lhyp = &nfslayouthash[i];
7552 NFSLOCKLAYOUT(lhyp);
7553 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
7554 if (clid->qval != lyp->lay_clientid.qval)
7556 if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0)
7558 if (laytype != lyp->lay_type)
7560 if ((iomode & NFSLAYOUTIOMODE_READ) != 0)
7561 lyp->lay_flags &= ~NFSLAY_READ;
7562 if ((iomode & NFSLAYOUTIOMODE_RW) != 0)
7563 lyp->lay_flags &= ~NFSLAY_RW;
7564 if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0)
7565 nfsrv_freelayout(&lhyp->list, lyp);
7567 NFSUNLOCKLAYOUT(lhyp);
7572 * Free all layouts for the argument file.
7575 nfsrv_freefilelayouts(fhandle_t *fhp)
7577 struct nfslayouthash *lhyp;
7578 struct nfslayout *lyp, *nlyp;
7580 lhyp = NFSLAYOUTHASH(fhp);
7581 NFSLOCKLAYOUT(lhyp);
7582 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
7583 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0)
7584 nfsrv_freelayout(&lhyp->list, lyp);
7586 NFSUNLOCKLAYOUT(lhyp);
7593 nfsrv_freealllayouts(void)
7595 struct nfslayouthash *lhyp;
7596 struct nfslayout *lyp, *nlyp;
7599 for (i = 0; i < nfsrv_layouthashsize; i++) {
7600 lhyp = &nfslayouthash[i];
7601 NFSLOCKLAYOUT(lhyp);
7602 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp)
7603 nfsrv_freelayout(&lhyp->list, lyp);
7604 NFSUNLOCKLAYOUT(lhyp);
7609 * Look up the mount path for the DS server.
7612 nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p,
7613 struct nfsdevice **dsp)
7615 struct nameidata nd;
7616 struct nfsdevice *ds;
7622 NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp);
7624 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
7627 NFSD_DEBUG(4, "lookup=%d\n", error);
7630 if (nd.ni_vp->v_type != VDIR) {
7632 NFSD_DEBUG(4, "dspath not dir\n");
7635 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
7637 NFSD_DEBUG(4, "dspath not an NFS mount\n");
7642 * Allocate a DS server structure with the NFS mounted directory
7643 * vnode reference counted, so that a non-forced dismount will
7645 * This structure is always linked into the list, even if an error
7646 * is being returned. The caller will free the entire list upon
7649 *dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t),
7650 M_NFSDSTATE, M_WAITOK | M_ZERO);
7651 ds->nfsdev_dvp = nd.ni_vp;
7652 ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount);
7653 NFSVOPUNLOCK(nd.ni_vp);
7655 dsdirsize = strlen(dspathp) + 16;
7656 dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK);
7657 /* Now, create the DS directory structures. */
7658 for (i = 0; i < nfsrv_dsdirsize; i++) {
7659 snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i);
7660 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
7661 UIO_SYSSPACE, dsdirpath, p);
7663 NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error);
7666 if (nd.ni_vp->v_type != VDIR) {
7669 NFSD_DEBUG(4, "dsdirpath not a VDIR\n");
7672 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
7675 NFSD_DEBUG(4, "dsdirpath not an NFS mount\n");
7678 ds->nfsdev_dsdir[i] = nd.ni_vp;
7679 NFSVOPUNLOCK(nd.ni_vp);
7681 free(dsdirpath, M_TEMP);
7683 if (strlen(mdspathp) > 0) {
7685 * This DS stores file for a specific MDS exported file
7688 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
7689 UIO_SYSSPACE, mdspathp, p);
7691 NFSD_DEBUG(4, "mds lookup=%d\n", error);
7694 if (nd.ni_vp->v_type != VDIR) {
7697 NFSD_DEBUG(4, "mdspath not dir\n");
7700 mp = nd.ni_vp->v_mount;
7701 if ((mp->mnt_flag & MNT_EXPORTED) == 0) {
7704 NFSD_DEBUG(4, "mdspath not an exported fs\n");
7707 ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid;
7708 ds->nfsdev_mdsisset = 1;
7713 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list);
7714 atomic_add_int(&nfsrv_devidcnt, 1);
7719 * Look up the mount path for the DS server and delete it.
7722 nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p)
7725 struct nfsmount *nmp;
7726 struct nfsdevice *ds;
7729 NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp);
7731 * Search for the path in the mount list. Avoid looking the path
7732 * up, since this mount point may be hung, with associated locked
7734 * Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked
7735 * until this completes.
7736 * As noted in the man page, this should be done before any forced
7737 * dismount on the mount point, but at least the handshake on
7738 * NFSMNTP_CANCELRPCS should make it safe.
7743 mtx_lock(&mountlist_mtx);
7744 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
7745 if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 &&
7746 strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 &&
7747 mp->mnt_data != NULL) {
7750 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM |
7751 NFSMNTP_CANCELRPCS)) == 0) {
7752 nmp->nm_privflag |= NFSMNTP_CANCELRPCS;
7761 mtx_unlock(&mountlist_mtx);
7764 ds = nfsrv_deldsnmp(op, nmp, p);
7765 NFSD_DEBUG(4, "deldsnmp=%p\n", ds);
7767 nfsrv_killrpcs(nmp);
7768 NFSD_DEBUG(4, "aft killrpcs\n");
7772 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
7781 * Search for and remove a DS entry which matches the "nmp" argument.
7782 * The nfsdevice structure pointer is returned so that the caller can
7783 * free it via nfsrv_freeonedevid().
7784 * For the forced case, do not try to do LayoutRecalls, since the server
7785 * must be shut down now anyhow.
7788 nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p)
7790 struct nfsdevice *fndds;
7792 NFSD_DEBUG(4, "deldsdvp\n");
7794 if (op == PNFSDOP_FORCEDELDS)
7795 fndds = nfsv4_findmirror(nmp);
7797 fndds = nfsrv_findmirroredds(nmp);
7799 nfsrv_deleteds(fndds);
7801 if (fndds != NULL) {
7802 if (op != PNFSDOP_FORCEDELDS)
7803 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p);
7804 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host);
7810 * Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid.
7811 * This function also calls nfsrv_killrpcs() to unblock RPCs on the mount
7813 * Also, returns an error instead of the nfsdevice found.
7816 nfsrv_delds(char *devid, NFSPROC_T *p)
7818 struct nfsdevice *ds, *fndds;
7819 struct nfsmount *nmp;
7822 NFSD_DEBUG(4, "delds\n");
7824 * Search the DS server list for a match with devid.
7825 * Remove the DS entry if found and there is a mirror.
7831 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
7832 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 &&
7833 ds->nfsdev_nmp != NULL) {
7834 NFSD_DEBUG(4, "fnd main ds\n");
7839 if (fndds == NULL) {
7843 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0)
7845 else if (fndds->nfsdev_mdsisset != 0) {
7846 /* For the fsid is set case, search for a mirror. */
7847 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
7848 if (ds != fndds && ds->nfsdev_nmp != NULL &&
7849 ds->nfsdev_mdsisset != 0 &&
7850 fsidcmp(&ds->nfsdev_mdsfsid,
7851 &fndds->nfsdev_mdsfsid) == 0) {
7857 if (fndmirror != 0) {
7858 nmp = fndds->nfsdev_nmp;
7860 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM |
7861 NFSMNTP_CANCELRPCS)) == 0) {
7862 nmp->nm_privflag |= NFSMNTP_CANCELRPCS;
7864 nfsrv_deleteds(fndds);
7872 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p);
7873 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host);
7874 nfsrv_killrpcs(nmp);
7876 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
7885 * Mark a DS as disabled by setting nfsdev_nmp = NULL.
7888 nfsrv_deleteds(struct nfsdevice *fndds)
7891 NFSD_DEBUG(4, "deleteds: deleting a mirror\n");
7892 fndds->nfsdev_nmp = NULL;
7893 if (fndds->nfsdev_mdsisset == 0)
7898 * Fill in the addr structures for the File and Flex File layouts.
7901 nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost)
7906 static uint64_t new_devid = 0;
7908 if (strchr(addr, ':') != NULL)
7913 /* Fill in the device id. */
7914 NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time));
7916 NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)],
7920 * Fill in the file addr (actually the nfsv4_file_layout_ds_addr4
7921 * as defined in RFC5661) in XDR.
7923 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) +
7925 NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot);
7926 ds->nfsdev_fileaddrlen = addrlen;
7927 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO);
7928 ds->nfsdev_fileaddr = (char *)tl;
7929 *tl++ = txdr_unsigned(1); /* One stripe with index 0. */
7931 *tl++ = txdr_unsigned(1); /* One multipath list */
7932 *tl++ = txdr_unsigned(1); /* with one entry in it. */
7933 /* The netaddr for this one entry. */
7934 *tl++ = txdr_unsigned(strlen(netprot));
7935 NFSBCOPY(netprot, tl, strlen(netprot));
7936 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED);
7937 *tl++ = txdr_unsigned(strlen(addr));
7938 NFSBCOPY(addr, tl, strlen(addr));
7941 * Fill in the flex file addr (actually the ff_device_addr4
7942 * as defined for Flexible File Layout) in XDR.
7944 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) +
7946 ds->nfsdev_flexaddrlen = addrlen;
7947 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO);
7948 ds->nfsdev_flexaddr = (char *)tl;
7949 *tl++ = txdr_unsigned(1); /* One multipath entry. */
7950 /* The netaddr for this one entry. */
7951 *tl++ = txdr_unsigned(strlen(netprot));
7952 NFSBCOPY(netprot, tl, strlen(netprot));
7953 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED);
7954 *tl++ = txdr_unsigned(strlen(addr));
7955 NFSBCOPY(addr, tl, strlen(addr));
7956 tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED);
7957 *tl++ = txdr_unsigned(2); /* Two NFS Versions. */
7958 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */
7959 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); /* Minor version 2. */
7960 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max rsize. */
7961 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max wsize. */
7962 *tl++ = newnfs_true; /* Tightly coupled. */
7963 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */
7964 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */
7965 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max rsize. */
7966 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max wsize. */
7967 *tl = newnfs_true; /* Tightly coupled. */
7969 ds->nfsdev_hostnamelen = strlen(dnshost);
7970 ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE,
7972 NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1);
7976 * Create the device id list.
7977 * Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument
7981 nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p)
7983 struct nfsdevice *ds;
7984 char *addrp, *dnshostp, *dspathp, *mdspathp;
7988 dnshostp = args->dnshost;
7989 dspathp = args->dspath;
7990 mdspathp = args->mdspath;
7991 nfsrv_maxpnfsmirror = args->mirrorcnt;
7992 if (addrp == NULL || dnshostp == NULL || dspathp == NULL ||
7997 * Loop around for each nul-terminated string in args->addr,
7998 * args->dnshost, args->dnspath and args->mdspath.
8000 while (addrp < (args->addr + args->addrlen) &&
8001 dnshostp < (args->dnshost + args->dnshostlen) &&
8002 dspathp < (args->dspath + args->dspathlen) &&
8003 mdspathp < (args->mdspath + args->mdspathlen)) {
8004 error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds);
8006 /* Free all DS servers. */
8007 nfsrv_freealldevids();
8011 nfsrv_allocdevid(ds, addrp, dnshostp);
8012 addrp += (strlen(addrp) + 1);
8013 dnshostp += (strlen(dnshostp) + 1);
8014 dspathp += (strlen(dspathp) + 1);
8015 mdspathp += (strlen(mdspathp) + 1);
8017 if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) {
8018 /* Free all DS servers. */
8019 nfsrv_freealldevids();
8021 nfsrv_maxpnfsmirror = 1;
8024 /* We can fail at most one less DS than the mirror level. */
8025 nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1;
8028 * Allocate the nfslayout hash table now, since this is a pNFS server.
8029 * Make it 1% of the high water mark and at least 100.
8031 if (nfslayouthash == NULL) {
8032 nfsrv_layouthashsize = nfsrv_layouthighwater / 100;
8033 if (nfsrv_layouthashsize < 100)
8034 nfsrv_layouthashsize = 100;
8035 nfslayouthash = mallocarray(nfsrv_layouthashsize,
8036 sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK |
8038 for (i = 0; i < nfsrv_layouthashsize; i++) {
8039 mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF);
8040 TAILQ_INIT(&nfslayouthash[i].list);
8047 * Free all device ids.
8050 nfsrv_freealldevids(void)
8052 struct nfsdevice *ds, *nds;
8054 TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds)
8055 nfsrv_freedevid(ds);
8059 * Check to see if there is a Read/Write Layout plus either:
8060 * - A Write Delegation
8062 * - An Open with Write_access.
8063 * Return 1 if this is the case and 0 otherwise.
8064 * This function is used by nfsrv_proxyds() to decide if doing a Proxy
8065 * Getattr RPC to the Data Server (DS) is necessary.
8067 #define NFSCLIDVECSIZE 6
8069 nfsrv_checkdsattr(vnode_t vp, NFSPROC_T *p)
8071 fhandle_t fh, *tfhp;
8072 struct nfsstate *stp;
8073 struct nfslayout *lyp;
8074 struct nfslayouthash *lhyp;
8075 struct nfslockhashhead *hp;
8076 struct nfslockfile *lfp;
8077 nfsquad_t clid[NFSCLIDVECSIZE];
8080 ret = nfsvno_getfh(vp, &fh, p);
8084 /* First check for a Read/Write Layout. */
8086 lhyp = NFSLAYOUTHASH(&fh);
8087 NFSLOCKLAYOUT(lhyp);
8088 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) {
8089 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
8090 ((lyp->lay_flags & NFSLAY_RW) != 0 ||
8091 ((lyp->lay_flags & NFSLAY_READ) != 0 &&
8092 nfsrv_pnfsatime != 0))) {
8093 if (clidcnt < NFSCLIDVECSIZE)
8094 clid[clidcnt].qval = lyp->lay_clientid.qval;
8098 NFSUNLOCKLAYOUT(lhyp);
8100 /* None found, so return 0. */
8104 /* Get the nfslockfile for this fh. */
8106 hp = NFSLOCKHASH(&fh);
8107 LIST_FOREACH(lfp, hp, lf_hash) {
8109 if (NFSVNO_CMPFH(&fh, tfhp))
8113 /* None found, so return 0. */
8118 /* Now, look for a Write delegation for this clientid. */
8119 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
8120 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 &&
8121 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0)
8125 /* Found one, so return 1. */
8130 /* No Write delegation, so look for an Open with Write_access. */
8131 LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
8132 KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0,
8133 ("nfsrv_checkdsattr: Non-open in Open list\n"));
8134 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 &&
8135 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0)
8145 * Look for a matching clientid in the vector. Return 1 if one might match.
8148 nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt)
8152 /* If too many for the vector, return 1 since there might be a match. */
8153 if (clidcnt > NFSCLIDVECSIZE)
8156 for (i = 0; i < clidcnt; i++)
8157 if (clidvec[i].qval == clid.qval)
8163 * Check the don't list for "vp" and see if issuing an rw layout is allowed.
8164 * Return 1 if issuing an rw layout isn't allowed, 0 otherwise.
8167 nfsrv_dontlayout(fhandle_t *fhp)
8169 struct nfsdontlist *mrp;
8172 if (nfsrv_dontlistlen == 0)
8176 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) {
8177 if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 &&
8178 (mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) {
8183 NFSDDONTLISTUNLOCK();
8187 #define PNFSDS_COPYSIZ 65536
8189 * Create a new file on a DS and copy the contents of an extant DS file to it.
8190 * This can be used for recovery of a DS file onto a recovered DS.
8192 * - When called, the MDS file's vnode is locked, blocking LayoutGet operations.
8193 * - Disable issuing of read/write layouts for the file via the nfsdontlist,
8194 * so that they will be disabled after the MDS file's vnode is unlocked.
8195 * - Set up the nfsrv_recalllist so that recall of read/write layouts can
8197 * - Unlock the MDS file's vnode, so that the client(s) can perform proxied
8198 * writes, LayoutCommits and LayoutReturns for the file when completing the
8199 * LayoutReturn requested by the LayoutRecall callback.
8200 * - Issue a LayoutRecall callback for all read/write layouts and wait for
8201 * them to be returned. (If the LayoutRecall callback replies
8202 * NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.)
8203 * - Exclusively lock the MDS file's vnode. This ensures that no proxied
8204 * writes are in progress or can occur during the DS file copy.
8205 * It also blocks Setattr operations.
8206 * - Create the file on the recovered mirror.
8207 * - Copy the file from the operational DS.
8208 * - Copy any ACL from the MDS file to the new DS file.
8209 * - Set the modify time of the new DS file to that of the MDS file.
8210 * - Update the extended attribute for the MDS file.
8211 * - Enable issuing of rw layouts by deleting the nfsdontlist entry.
8212 * - The caller will unlock the MDS file's vnode allowing operations
8213 * to continue normally, since it is now on the mirror again.
8216 nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds,
8217 struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt,
8218 struct ucred *cred, NFSPROC_T *p)
8220 struct nfsdontlist *mrp, *nmrp;
8221 struct nfslayouthash *lhyp;
8222 struct nfslayout *lyp, *nlyp;
8223 struct nfslayouthead thl;
8224 struct mount *mp, *tvmp;
8227 struct timespec mtime;
8233 int didprintf, ret, retacl, xfer;
8235 ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp");
8236 ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp");
8238 * Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag
8239 * so that no more RW layouts will get issued.
8241 ret = nfsvno_getfh(vp, &fh, p);
8243 NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret);
8246 nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK);
8247 nmrp->nfsmr_flags = NFSMR_DONTLAYOUT;
8248 NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh));
8250 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) {
8251 if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0)
8255 LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list);
8258 nfsrv_dontlistlen++;
8259 NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n");
8261 NFSDDONTLISTUNLOCK();
8262 free(nmrp, M_NFSDSTATE);
8263 NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n");
8266 NFSDDONTLISTUNLOCK();
8269 * Search for all RW layouts for this file. Move them to the
8270 * recall list, so they can be recalled and their return noted.
8272 lhyp = NFSLAYOUTHASH(&fh);
8274 NFSLOCKLAYOUT(lhyp);
8275 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
8276 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
8277 (lyp->lay_flags & NFSLAY_RW) != 0) {
8278 TAILQ_REMOVE(&lhyp->list, lyp, lay_list);
8279 TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list);
8280 lyp->lay_trycnt = 0;
8283 NFSUNLOCKLAYOUT(lhyp);
8290 /* Unlock the MDS vp, so that a LayoutReturn can be done on it. */
8292 /* Now, do a recall for all layouts not yet recalled. */
8295 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
8296 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
8297 (lyp->lay_flags & NFSLAY_RECALL) == 0) {
8298 lyp->lay_flags |= NFSLAY_RECALL;
8300 * The layout stateid.seqid needs to be incremented
8301 * before doing a LAYOUT_RECALL callback.
8303 if (++lyp->lay_stateid.seqid == 0)
8304 lyp->lay_stateid.seqid = 1;
8306 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid,
8307 &lyp->lay_fh, lyp, 0, lyp->lay_type, p);
8308 NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n");
8313 /* Now wait for them to be returned. */
8315 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
8316 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) {
8317 if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) {
8318 TAILQ_REMOVE(&nfsrv_recalllisthead, lyp,
8320 TAILQ_INSERT_HEAD(&thl, lyp, lay_list);
8322 "nfsrv_copymr: layout returned\n");
8325 ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR,
8326 PVFS | PCATCH, "nfsmrl", hz);
8327 NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n",
8329 if (ret == EINTR || ret == ERESTART)
8331 if ((lyp->lay_flags & NFSLAY_RETURNED) == 0) {
8333 * Give up after 60sec and return
8334 * ENXIO, failing the copymr.
8335 * This layout will remain on the
8336 * recalllist. It can only be cleared
8337 * by restarting the nfsd.
8338 * This seems the safe way to handle
8339 * it, since it cannot be safely copied
8340 * with an outstanding RW layout.
8342 if (lyp->lay_trycnt >= 60) {
8346 if (didprintf == 0) {
8347 printf("nfsrv_copymr: layout "
8357 /* We can now get rid of the layouts that have been returned. */
8358 TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp)
8359 nfsrv_freelayout(&thl, lyp);
8362 * Do the vn_start_write() calls here, before the MDS vnode is
8363 * locked and the tvp is created (locked) in the NFS file system
8365 * For tvmp, this probably isn't necessary, since it will be an
8366 * NFS mount and they are not suspendable at this time.
8369 ret = vn_start_write(vp, &mp, V_WAIT | PCATCH);
8371 tvmp = dvp->v_mount;
8372 ret = vn_start_write(NULL, &tvmp, V_WAIT | PCATCH);
8376 * LK_EXCLUSIVE lock the MDS vnode, so that any
8377 * proxied writes through the MDS will be blocked until we have
8378 * completed the copy and update of the extended attributes.
8379 * This will also ensure that any attributes and ACL will not be
8380 * changed until the copy is complete.
8382 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
8383 if (ret == 0 && VN_IS_DOOMED(vp)) {
8384 NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n");
8388 /* Create the data file on the recovered DS. */
8390 ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp);
8392 /* Copy the DS file, if created successfully. */
8395 * Get any NFSv4 ACL on the MDS file, so that it can be set
8396 * on the new DS file.
8398 aclp = acl_alloc(M_WAITOK | M_ZERO);
8399 retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p);
8400 if (retacl != 0 && retacl != ENOATTR)
8401 NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl);
8402 dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK);
8403 /* Malloc a block of 0s used to check for holes. */
8404 if (nfsrv_zeropnfsdat == NULL)
8405 nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP,
8408 ret = VOP_GETATTR(fvp, &va, cred);
8410 while (ret == 0 && aresid == 0) {
8411 ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ,
8412 rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL,
8414 xfer = PNFSDS_COPYSIZ - aresid;
8415 if (ret == 0 && xfer > 0) {
8418 * Skip the write for holes, except for the
8421 if (xfer < PNFSDS_COPYSIZ || rdpos ==
8422 va.va_size || NFSBCMP(dat,
8423 nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0)
8424 ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer,
8425 wrpos, UIO_SYSSPACE, IO_NODELOCKED,
8426 cred, NULL, NULL, p);
8432 /* If there is an ACL and the copy succeeded, set the ACL. */
8433 if (ret == 0 && retacl == 0) {
8434 ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p);
8436 * Don't consider these as errors, since VOP_GETACL()
8437 * can return an ACL when they are not actually
8438 * supported. For example, for UFS, VOP_GETACL()
8439 * will return a trivial ACL based on the uid/gid/mode
8440 * when there is no ACL on the file.
8441 * This case should be recognized as a trivial ACL
8442 * by UFS's VOP_SETACL() and succeed, but...
8444 if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM)
8449 ret = VOP_FSYNC(tvp, MNT_WAIT, p);
8451 /* Set the DS data file's modify time that of the MDS file. */
8453 ret = VOP_GETATTR(vp, &va, cred);
8455 mtime = va.va_mtime;
8457 va.va_mtime = mtime;
8458 ret = VOP_SETATTR(tvp, &va, cred);
8466 vn_finished_write(tvmp);
8468 /* Update the extended attributes for the newly created DS file. */
8470 ret = vn_extattr_set(vp, IO_NODELOCKED,
8471 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile",
8472 sizeof(*wpf) * mirrorcnt, (char *)wpf, p);
8474 vn_finished_write(mp);
8476 /* Get rid of the dontlist entry, so that Layouts can be issued. */
8478 LIST_REMOVE(mrp, nfsmr_list);
8479 NFSDDONTLISTUNLOCK();
8480 free(mrp, M_NFSDSTATE);
8485 * Create a data storage file on the recovered DS.
8488 nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf,
8489 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p,
8492 struct vattr va, nva;
8495 /* Make data file name based on FH. */
8496 error = VOP_GETATTR(vp, &va, cred);
8498 /* Set the attributes for "vp" to Setattr the DS vp. */
8500 nva.va_uid = va.va_uid;
8501 nva.va_gid = va.va_gid;
8502 nva.va_mode = va.va_mode;
8506 va.va_mode = nva.va_mode;
8507 NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf);
8508 error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL,
8509 pf->dsf_filename, cred, p, tvpp);
8515 * Look up the MDS file shared locked, and then get the extended attribute
8516 * to find the extant DS file to be copied to the new mirror.
8517 * If successful, *vpp is set to the MDS file's vp and *nvpp is
8518 * set to a DS data file for the MDS file, both exclusively locked.
8519 * The "buf" argument has the pnfsdsfile structure from the MDS file
8520 * in it and buflen is set to its length.
8523 nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf,
8524 int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp,
8525 struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp,
8526 struct nfsdevice **fdsp)
8528 struct nameidata nd;
8529 struct vnode *vp, *curvp;
8530 struct pnfsdsfile *pf;
8531 struct nfsmount *nmp, *curnmp;
8532 int dsdir, error, mirrorcnt, ippos;
8539 if (dspathp == NULL && curdspathp != NULL)
8543 * Look up the MDS file shared locked. The lock will be upgraded
8544 * to an exclusive lock after any rw layouts have been returned.
8546 NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp);
8547 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
8550 NFSD_DEBUG(4, "lookup=%d\n", error);
8553 if (nd.ni_vp->v_type != VREG) {
8555 NFSD_DEBUG(4, "mdspath not reg\n");
8560 if (curdspathp != NULL) {
8562 * Look up the current DS path and find the nfsdev structure for
8565 NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp);
8566 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
8567 UIO_SYSSPACE, curdspathp, p);
8569 NFSD_DEBUG(4, "ds lookup=%d\n", error);
8574 if (nd.ni_vp->v_type != VDIR) {
8577 NFSD_DEBUG(4, "curdspath not dir\n");
8580 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
8583 NFSD_DEBUG(4, "curdspath not an NFS mount\n");
8586 curnmp = VFSTONFS(nd.ni_vp->v_mount);
8588 /* Search the nfsdev list for a match. */
8590 *fdsp = nfsv4_findmirror(curnmp);
8594 if (curnmp == NULL) {
8597 NFSD_DEBUG(4, "mdscopymr: no current ds\n");
8603 if (dspathp != NULL) {
8604 /* Look up the nfsdev path and find the nfsdev structure. */
8605 NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp);
8606 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
8607 UIO_SYSSPACE, dspathp, p);
8609 NFSD_DEBUG(4, "ds lookup=%d\n", error);
8616 if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) {
8621 NFSD_DEBUG(4, "dspath not dir\n");
8622 if (nd.ni_vp == curvp)
8626 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
8631 NFSD_DEBUG(4, "dspath not an NFS mount\n");
8634 nmp = VFSTONFS(nd.ni_vp->v_mount);
8637 * Search the nfsdevice list for a match. If curnmp == NULL,
8638 * this is a recovery and there must be a mirror.
8642 *dsp = nfsrv_findmirroredds(nmp);
8644 *dsp = nfsv4_findmirror(nmp);
8651 NFSD_DEBUG(4, "mdscopymr: no ds\n");
8660 * Get a vp for an available DS data file using the extended
8661 * attribute on the MDS file.
8662 * If there is a valid entry for the new DS in the extended attribute
8663 * on the MDS file (as checked via the nmp argument),
8664 * nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur.
8666 error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p,
8667 NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir);
8670 if (nd.ni_vp == NULL) {
8671 if (error == 0 && nmp != NULL) {
8672 /* Search the nfsdev list for a match. */
8674 *dsp = nfsrv_findmirroredds(nmp);
8677 if (error == 0 && (nmp == NULL || *dsp == NULL)) {
8678 if (nvpp != NULL && *nvpp != NULL) {
8688 * When dspathp != NULL and curdspathp == NULL, this is a recovery
8689 * and is only allowed if there is a 0.0.0.0 IP address entry.
8690 * When curdspathp != NULL, the ippos will be set to that entry.
8692 if (error == 0 && dspathp != NULL && ippos == -1) {
8693 if (nvpp != NULL && *nvpp != NULL) {
8702 pf = (struct pnfsdsfile *)buf;
8704 /* If no zeroip pnfsdsfile, add one. */
8705 ippos = *buflenp / sizeof(*pf);
8706 *buflenp += sizeof(*pf);
8708 pf->dsf_dir = dsdir;
8709 strlcpy(pf->dsf_filename, fname,
8710 sizeof(pf->dsf_filename));
8720 * Search for a matching pnfsd mirror device structure, base on the nmp arg.
8721 * Return one if found, NULL otherwise.
8723 static struct nfsdevice *
8724 nfsrv_findmirroredds(struct nfsmount *nmp)
8726 struct nfsdevice *ds, *fndds;
8729 mtx_assert(NFSDDSMUTEXPTR, MA_OWNED);
8731 * Search the DS server list for a match with nmp.
8732 * Remove the DS entry if found and there is a mirror.
8736 if (nfsrv_devidcnt == 0)
8738 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
8739 if (ds->nfsdev_nmp == nmp) {
8740 NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n");
8747 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0)
8749 else if (fndds->nfsdev_mdsisset != 0) {
8750 /* For the fsid is set case, search for a mirror. */
8751 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
8752 if (ds != fndds && ds->nfsdev_nmp != NULL &&
8753 ds->nfsdev_mdsisset != 0 &&
8754 fsidcmp(&ds->nfsdev_mdsfsid,
8755 &fndds->nfsdev_mdsfsid) == 0) {
8761 if (fndmirror == 0) {
8762 NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n");