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source: rtems-libbsd/freebsd/sys/fs/nfs/nfs_commonport.c @ 882425f

6-freebsd-12

Last change on this file since 882425f was 882425f, checked in by Chris Johns <chrisj@…>, on 07/29/21 at 05:49:52

kern/sys: Add NFSv4 client

Update #4475

Property mode set to 100644

File size: 22.9 KB

Line
1	#include <machine/rtems-bsd-kernel-space.h>
2
3	/*-
4	* SPDX-License-Identifier: BSD-3-Clause
5	*
6	* Copyright (c) 1989, 1993
7	* The Regents of the University of California. All rights reserved.
8	*
9	* This code is derived from software contributed to Berkeley by
10	* Rick Macklem at The University of Guelph.
11	*
12	* Redistribution and use in source and binary forms, with or without
13	* modification, are permitted provided that the following conditions
14	* are met:
15	* 1. Redistributions of source code must retain the above copyright
16	* notice, this list of conditions and the following disclaimer.
17	* 2. Redistributions in binary form must reproduce the above copyright
18	* notice, this list of conditions and the following disclaimer in the
19	* documentation and/or other materials provided with the distribution.
20	* 3. Neither the name of the University nor the names of its contributors
21	* may be used to endorse or promote products derived from this software
22	* without specific prior written permission.
23	*
24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34	* SUCH DAMAGE.
35	*
36	*/
37
38	#include <sys/cdefs.h>
39	__FBSDID("$FreeBSD$");
40
41	/*
42	* Functions that need to be different for different versions of BSD
43	* kernel should be kept here, along with any global storage specific
44	* to this BSD variant.
45	*/
46	#include <fs/nfs/nfsport.h>
47	#include <sys/smp.h>
48	#include <sys/sysctl.h>
49	#include <sys/taskqueue.h>
50	#include <rpc/rpc_com.h>
51	#include <vm/vm.h>
52	#include <vm/vm_object.h>
53	#include <vm/vm_page.h>
54	#include <vm/vm_param.h>
55	#include <vm/vm_map.h>
56	#include <vm/vm_kern.h>
57	#include <vm/vm_extern.h>
58	#include <vm/uma.h>
59
60	extern int nfscl_ticks;
61	extern nfsuserd_state nfsrv_nfsuserd;
62	extern struct nfssockreq nfsrv_nfsuserdsock;
63	extern void (nfsd_call_recall)(struct vnode , int, struct ucred *,
64	struct thread *);
65	extern int nfsrv_useacl;
66	struct mount nfsv4root_mnt;
67	int newnfs_numnfsd = 0;
68	struct nfsstatsv1 nfsstatsv1;
69	int nfs_numnfscbd = 0;
70	int nfscl_debuglevel = 0;
71	char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
72	struct callout newnfsd_callout;
73	int nfsrv_lughashsize = 100;
74	struct mtx nfsrv_dslock_mtx;
75	struct nfsdevicehead nfsrv_devidhead;
76	volatile int nfsrv_devidcnt = 0;
77	void (*nfsd_call_servertimer)(void) = NULL;
78	void (ncl_call_invalcaches)(struct vnode ) = NULL;
79
80	int nfs_pnfsio(task_fn_t , void );
81
82	static int nfs_realign_test;
83	static int nfs_realign_count;
84	static struct ext_nfsstats oldnfsstats;
85
86	SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
87	SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test,
88	0, "Number of realign tests done");
89	SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count,
90	0, "Number of mbuf realignments done");
91	SYSCTL_STRING(_vfs_nfs, OID_AUTO, callback_addr, CTLFLAG_RW,
92	nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr),
93	"NFSv4 callback addr for server to use");
94	SYSCTL_INT(_vfs_nfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nfscl_debuglevel,
95	0, "Debug level for NFS client");
96	SYSCTL_INT(_vfs_nfs, OID_AUTO, userhashsize, CTLFLAG_RDTUN, &nfsrv_lughashsize,
97	0, "Size of hash tables for uid/name mapping");
98	int nfs_pnfsiothreads = -1;
99	SYSCTL_INT(_vfs_nfs, OID_AUTO, pnfsiothreads, CTLFLAG_RW, &nfs_pnfsiothreads,
100	0, "Number of pNFS mirror I/O threads");
101
102	/*
103	* Defines for malloc
104	* (Here for FreeBSD, since they allocate storage.)
105	*/
106	MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache");
107	MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id");
108	MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state",
109	"NFSD V4 State (Openowner, Open, Lockowner, Delegation");
110	MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock");
111	MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file");
112	MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string");
113	MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map");
114	MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header");
115	MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle");
116	MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner");
117	MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open");
118	MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation");
119	MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client");
120	MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner");
121	MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock");
122	MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "NFS vnode");
123	MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "NFS Direct IO buffer");
124	MALLOC_DEFINE(M_NEWNFSDIROFF, "NFSCL diroffdiroff",
125	"NFS directory offset data");
126	MALLOC_DEFINE(M_NEWNFSDROLLBACK, "NFSD rollback",
127	"NFS local lock rollback");
128	MALLOC_DEFINE(M_NEWNFSLAYOUT, "NFSCL layout", "NFSv4.1 Layout");
129	MALLOC_DEFINE(M_NEWNFSFLAYOUT, "NFSCL flayout", "NFSv4.1 File Layout");
130	MALLOC_DEFINE(M_NEWNFSDEVINFO, "NFSCL devinfo", "NFSv4.1 Device Info");
131	MALLOC_DEFINE(M_NEWNFSSOCKREQ, "NFSCL sockreq", "NFS Sock Req");
132	MALLOC_DEFINE(M_NEWNFSCLDS, "NFSCL session", "NFSv4.1 Session");
133	MALLOC_DEFINE(M_NEWNFSLAYRECALL, "NFSCL layrecall", "NFSv4.1 Layout Recall");
134	MALLOC_DEFINE(M_NEWNFSDSESSION, "NFSD session", "NFSD Session for a client");
135
136	/*
137	* Definition of mutex locks.
138	* newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
139	* and assorted other nfsd structures.
140	*/
141	struct mtx newnfsd_mtx;
142	struct mtx nfs_sockl_mutex;
143	struct mtx nfs_state_mutex;
144	struct mtx nfs_nameid_mutex;
145	struct mtx nfs_req_mutex;
146	struct mtx nfs_slock_mutex;
147	struct mtx nfs_clstate_mutex;
148
149	/* local functions */
150	static int nfssvc_call(struct thread , struct nfssvc_args , struct ucred *);
151
152	#ifdef __NO_STRICT_ALIGNMENT
153	/*
154	* These architectures don't need re-alignment, so just return.
155	*/
156	int
157	newnfs_realign(struct mbuf **pm, int how)
158	{
159
160	return (0);
161	}
162	#else /* !__NO_STRICT_ALIGNMENT */
163	/*
164	* newnfs_realign:
165	*
166	* Check for badly aligned mbuf data and realign by copying the unaligned
167	* portion of the data into a new mbuf chain and freeing the portions
168	* of the old chain that were replaced.
169	*
170	* We cannot simply realign the data within the existing mbuf chain
171	* because the underlying buffers may contain other rpc commands and
172	* we cannot afford to overwrite them.
173	*
174	* We would prefer to avoid this situation entirely. The situation does
175	* not occur with NFS/UDP and is supposed to only occasionally occur
176	* with TCP. Use vfs.nfs.realign_count and realign_test to check this.
177	*
178	*/
179	int
180	newnfs_realign(struct mbuf **pm, int how)
181	{
182	struct mbuf m, n;
183	int off, space;
184
185	++nfs_realign_test;
186	while ((m = *pm) != NULL) {
187	if ((m->m_len & 0x3) \|\| (mtod(m, intptr_t) & 0x3)) {
188	/*
189	* NB: we can't depend on m_pkthdr.len to help us
190	* decide what to do here. May not be worth doing
191	* the m_length calculation as m_copyback will
192	* expand the mbuf chain below as needed.
193	*/
194	space = m_length(m, NULL);
195	if (space >= MINCLSIZE) {
196	/* NB: m_copyback handles space > MCLBYTES */
197	n = m_getcl(how, MT_DATA, 0);
198	} else
199	n = m_get(how, MT_DATA);
200	if (n == NULL)
201	return (ENOMEM);
202	/*
203	* Align the remainder of the mbuf chain.
204	*/
205	n->m_len = 0;
206	off = 0;
207	while (m != NULL) {
208	m_copyback(n, off, m->m_len, mtod(m, caddr_t));
209	off += m->m_len;
210	m = m->m_next;
211	}
212	m_freem(*pm);
213	*pm = n;
214	++nfs_realign_count;
215	break;
216	}
217	pm = &m->m_next;
218	}
219
220	return (0);
221	}
222	#endif /* __NO_STRICT_ALIGNMENT */
223
224	#ifdef notdef
225	static void
226	nfsrv_object_create(struct vnode vp, struct thread td)
227	{
228
229	if (vp == NULL \|\| vp->v_type != VREG)
230	return;
231	(void) vfs_object_create(vp, td, td->td_ucred);
232	}
233	#endif
234
235	/*
236	* Look up a file name. Basically just initialize stuff and call namei().
237	*/
238	int
239	nfsrv_lookupfilename(struct nameidata ndp, char fname, NFSPROC_T *p)
240	{
241	int error;
242
243	NDINIT(ndp, LOOKUP, FOLLOW \| LOCKLEAF, UIO_USERSPACE, fname,
244	p);
245	error = namei(ndp);
246	if (!error) {
247	NDFREE(ndp, NDF_ONLY_PNBUF);
248	}
249	return (error);
250	}
251
252	/*
253	* Copy NFS uid, gids to the cred structure.
254	*/
255	void
256	newnfs_copycred(struct nfscred nfscr, struct ucred cr)
257	{
258
259	KASSERT(nfscr->nfsc_ngroups >= 0,
260	("newnfs_copycred: negative nfsc_ngroups"));
261	cr->cr_uid = nfscr->nfsc_uid;
262	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
263	}
264
265	/*
266	* Map args from nfsmsleep() to msleep().
267	*/
268	int
269	nfsmsleep(void chan, void mutex, int prio, const char *wmesg,
270	struct timespec *ts)
271	{
272	u_int64_t nsecval;
273	int error, timeo;
274
275	if (ts) {
276	timeo = hz * ts->tv_sec;
277	nsecval = (u_int64_t)ts->tv_nsec;
278	nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
279	1000000000;
280	timeo += (int)nsecval;
281	} else {
282	timeo = 0;
283	}
284	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
285	return (error);
286	}
287
288	/*
289	* Get the file system info for the server. For now, just assume FFS.
290	*/
291	void
292	nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
293	{
294	int pref;
295
296	/*
297	* XXX
298	* There should be file system VFS OP(s) to get this information.
299	* For now, assume ufs.
300	*/
301	if (isdgram)
302	pref = NFS_MAXDGRAMDATA;
303	else
304	pref = NFS_SRVMAXIO;
305	sip->fs_rtmax = NFS_SRVMAXIO;
306	sip->fs_rtpref = pref;
307	sip->fs_rtmult = NFS_FABLKSIZE;
308	sip->fs_wtmax = NFS_SRVMAXIO;
309	sip->fs_wtpref = pref;
310	sip->fs_wtmult = NFS_FABLKSIZE;
311	sip->fs_dtpref = pref;
312	sip->fs_maxfilesize = 0xffffffffffffffffull;
313	sip->fs_timedelta.tv_sec = 0;
314	sip->fs_timedelta.tv_nsec = 1;
315	sip->fs_properties = (NFSV3FSINFO_LINK \|
316	NFSV3FSINFO_SYMLINK \| NFSV3FSINFO_HOMOGENEOUS \|
317	NFSV3FSINFO_CANSETTIME);
318	}
319
320	/*
321	* Do the pathconf vnode op.
322	*/
323	int
324	nfsvno_pathconf(struct vnode vp, int flag, long retf,
325	struct ucred cred, struct thread p)
326	{
327	int error;
328
329	error = VOP_PATHCONF(vp, flag, retf);
330	if (error == EOPNOTSUPP \|\| error == EINVAL) {
331	/*
332	* Some file systems return EINVAL for name arguments not
333	* supported and some return EOPNOTSUPP for this case.
334	* So the NFSv3 Pathconf RPC doesn't fail for these cases,
335	* just fake them.
336	*/
337	switch (flag) {
338	case _PC_LINK_MAX:
339	*retf = NFS_LINK_MAX;
340	break;
341	case _PC_NAME_MAX:
342	*retf = NAME_MAX;
343	break;
344	case _PC_CHOWN_RESTRICTED:
345	*retf = 1;
346	break;
347	case _PC_NO_TRUNC:
348	*retf = 1;
349	break;
350	default:
351	/*
352	* Only happens if a _PC_xxx is added to the server,
353	* but this isn't updated.
354	*/
355	*retf = 0;
356	printf("nfsrvd pathconf flag=%d not supp\n", flag);
357	}
358	error = 0;
359	}
360	NFSEXITCODE(error);
361	return (error);
362	}
363
364	/* Fake nfsrv_atroot. Just return 0 */
365	int
366	nfsrv_atroot(struct vnode vp, uint64_t retp)
367	{
368
369	return (0);
370	}
371
372	/*
373	* Set the credentials to refer to root.
374	* If only the various BSDen could agree on whether cr_gid is a separate
375	* field or cr_groups[0]...
376	*/
377	void
378	newnfs_setroot(struct ucred *cred)
379	{
380
381	cred->cr_uid = 0;
382	cred->cr_groups[0] = 0;
383	cred->cr_ngroups = 1;
384	}
385
386	/*
387	* Get the client credential. Used for Renew and recovery.
388	*/
389	struct ucred *
390	newnfs_getcred(void)
391	{
392	struct ucred *cred;
393	struct thread *td = curthread;
394
395	cred = crdup(td->td_ucred);
396	newnfs_setroot(cred);
397	return (cred);
398	}
399
400	/*
401	* Nfs timer routine
402	* Call the nfsd's timer function once/sec.
403	*/
404	void
405	newnfs_timer(void *arg)
406	{
407	static time_t lasttime = 0;
408	/*
409	* Call the server timer, if set up.
410	* The argument indicates if it is the next second and therefore
411	* leases should be checked.
412	*/
413	if (lasttime != NFSD_MONOSEC) {
414	lasttime = NFSD_MONOSEC;
415	if (nfsd_call_servertimer != NULL)
416	(*nfsd_call_servertimer)();
417	}
418	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
419	}
420
421
422	/*
423	* Sleep for a short period of time unless errval == NFSERR_GRACE, where
424	* the sleep should be for 5 seconds.
425	* Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
426	* an event that never gets a wakeup. Only return EINTR or 0.
427	*/
428	int
429	nfs_catnap(int prio, int errval, const char *wmesg)
430	{
431	static int non_event;
432	int ret;
433
434	if (errval == NFSERR_GRACE)
435	ret = tsleep(&non_event, prio, wmesg, 5 * hz);
436	else
437	ret = tsleep(&non_event, prio, wmesg, 1);
438	if (ret != EINTR)
439	ret = 0;
440	return (ret);
441	}
442
443	/*
444	* Get referral. For now, just fail.
445	*/
446	struct nfsreferral *
447	nfsv4root_getreferral(struct vnode vp, struct vnode dvp, u_int32_t fileno)
448	{
449
450	return (NULL);
451	}
452
453	static int
454	nfssvc_nfscommon(struct thread td, struct nfssvc_args uap)
455	{
456	int error;
457
458	error = nfssvc_call(td, uap, td->td_ucred);
459	NFSEXITCODE(error);
460	return (error);
461	}
462
463	static int
464	nfssvc_call(struct thread p, struct nfssvc_args uap, struct ucred *cred)
465	{
466	int error = EINVAL, i, j;
467	struct nfsd_idargs nid;
468	struct nfsd_oidargs onid;
469	struct {
470	int vers; /* Just the first field of nfsstats. */
471	} nfsstatver;
472
473	if (uap->flag & NFSSVC_IDNAME) {
474	if ((uap->flag & NFSSVC_NEWSTRUCT) != 0)
475	error = copyin(uap->argp, &nid, sizeof(nid));
476	else {
477	error = copyin(uap->argp, &onid, sizeof(onid));
478	if (error == 0) {
479	nid.nid_flag = onid.nid_flag;
480	nid.nid_uid = onid.nid_uid;
481	nid.nid_gid = onid.nid_gid;
482	nid.nid_usermax = onid.nid_usermax;
483	nid.nid_usertimeout = onid.nid_usertimeout;
484	nid.nid_name = onid.nid_name;
485	nid.nid_namelen = onid.nid_namelen;
486	nid.nid_ngroup = 0;
487	nid.nid_grps = NULL;
488	}
489	}
490	if (error)
491	goto out;
492	error = nfssvc_idname(&nid);
493	goto out;
494	} else if (uap->flag & NFSSVC_GETSTATS) {
495	if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) {
496	/* Copy fields to the old ext_nfsstat structure. */
497	oldnfsstats.attrcache_hits =
498	nfsstatsv1.attrcache_hits;
499	oldnfsstats.attrcache_misses =
500	nfsstatsv1.attrcache_misses;
501	oldnfsstats.lookupcache_hits =
502	nfsstatsv1.lookupcache_hits;
503	oldnfsstats.lookupcache_misses =
504	nfsstatsv1.lookupcache_misses;
505	oldnfsstats.direofcache_hits =
506	nfsstatsv1.direofcache_hits;
507	oldnfsstats.direofcache_misses =
508	nfsstatsv1.direofcache_misses;
509	oldnfsstats.accesscache_hits =
510	nfsstatsv1.accesscache_hits;
511	oldnfsstats.accesscache_misses =
512	nfsstatsv1.accesscache_misses;
513	oldnfsstats.biocache_reads =
514	nfsstatsv1.biocache_reads;
515	oldnfsstats.read_bios =
516	nfsstatsv1.read_bios;
517	oldnfsstats.read_physios =
518	nfsstatsv1.read_physios;
519	oldnfsstats.biocache_writes =
520	nfsstatsv1.biocache_writes;
521	oldnfsstats.write_bios =
522	nfsstatsv1.write_bios;
523	oldnfsstats.write_physios =
524	nfsstatsv1.write_physios;
525	oldnfsstats.biocache_readlinks =
526	nfsstatsv1.biocache_readlinks;
527	oldnfsstats.readlink_bios =
528	nfsstatsv1.readlink_bios;
529	oldnfsstats.biocache_readdirs =
530	nfsstatsv1.biocache_readdirs;
531	oldnfsstats.readdir_bios =
532	nfsstatsv1.readdir_bios;
533	for (i = 0; i < NFSV4_NPROCS; i++)
534	oldnfsstats.rpccnt[i] = nfsstatsv1.rpccnt[i];
535	oldnfsstats.rpcretries = nfsstatsv1.rpcretries;
536	for (i = 0; i < NFSV4OP_NOPS; i++)
537	oldnfsstats.srvrpccnt[i] =
538	nfsstatsv1.srvrpccnt[i];
539	for (i = NFSV42_NOPS, j = NFSV4OP_NOPS;
540	i < NFSV42_NOPS + NFSV4OP_FAKENOPS; i++, j++)
541	oldnfsstats.srvrpccnt[j] =
542	nfsstatsv1.srvrpccnt[i];
543	oldnfsstats.srvrpc_errs = nfsstatsv1.srvrpc_errs;
544	oldnfsstats.srv_errs = nfsstatsv1.srv_errs;
545	oldnfsstats.rpcrequests = nfsstatsv1.rpcrequests;
546	oldnfsstats.rpctimeouts = nfsstatsv1.rpctimeouts;
547	oldnfsstats.rpcunexpected = nfsstatsv1.rpcunexpected;
548	oldnfsstats.rpcinvalid = nfsstatsv1.rpcinvalid;
549	oldnfsstats.srvcache_inproghits =
550	nfsstatsv1.srvcache_inproghits;
551	oldnfsstats.srvcache_idemdonehits =
552	nfsstatsv1.srvcache_idemdonehits;
553	oldnfsstats.srvcache_nonidemdonehits =
554	nfsstatsv1.srvcache_nonidemdonehits;
555	oldnfsstats.srvcache_misses =
556	nfsstatsv1.srvcache_misses;
557	oldnfsstats.srvcache_tcppeak =
558	nfsstatsv1.srvcache_tcppeak;
559	oldnfsstats.srvcache_size = nfsstatsv1.srvcache_size;
560	oldnfsstats.srvclients = nfsstatsv1.srvclients;
561	oldnfsstats.srvopenowners = nfsstatsv1.srvopenowners;
562	oldnfsstats.srvopens = nfsstatsv1.srvopens;
563	oldnfsstats.srvlockowners = nfsstatsv1.srvlockowners;
564	oldnfsstats.srvlocks = nfsstatsv1.srvlocks;
565	oldnfsstats.srvdelegates = nfsstatsv1.srvdelegates;
566	for (i = 0; i < NFSV4OP_CBNOPS; i++)
567	oldnfsstats.cbrpccnt[i] =
568	nfsstatsv1.cbrpccnt[i];
569	oldnfsstats.clopenowners = nfsstatsv1.clopenowners;
570	oldnfsstats.clopens = nfsstatsv1.clopens;
571	oldnfsstats.cllockowners = nfsstatsv1.cllockowners;
572	oldnfsstats.cllocks = nfsstatsv1.cllocks;
573	oldnfsstats.cldelegates = nfsstatsv1.cldelegates;
574	oldnfsstats.cllocalopenowners =
575	nfsstatsv1.cllocalopenowners;
576	oldnfsstats.cllocalopens = nfsstatsv1.cllocalopens;
577	oldnfsstats.cllocallockowners =
578	nfsstatsv1.cllocallockowners;
579	oldnfsstats.cllocallocks = nfsstatsv1.cllocallocks;
580	error = copyout(&oldnfsstats, uap->argp,
581	sizeof (oldnfsstats));
582	} else {
583	error = copyin(uap->argp, &nfsstatver,
584	sizeof(nfsstatver));
585	if (error == 0 && nfsstatver.vers != NFSSTATS_V1)
586	error = EPERM;
587	if (error == 0)
588	error = copyout(&nfsstatsv1, uap->argp,
589	sizeof (nfsstatsv1));
590	}
591	if (error == 0) {
592	if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
593	nfsstatsv1.attrcache_hits = 0;
594	nfsstatsv1.attrcache_misses = 0;
595	nfsstatsv1.lookupcache_hits = 0;
596	nfsstatsv1.lookupcache_misses = 0;
597	nfsstatsv1.direofcache_hits = 0;
598	nfsstatsv1.direofcache_misses = 0;
599	nfsstatsv1.accesscache_hits = 0;
600	nfsstatsv1.accesscache_misses = 0;
601	nfsstatsv1.biocache_reads = 0;
602	nfsstatsv1.read_bios = 0;
603	nfsstatsv1.read_physios = 0;
604	nfsstatsv1.biocache_writes = 0;
605	nfsstatsv1.write_bios = 0;
606	nfsstatsv1.write_physios = 0;
607	nfsstatsv1.biocache_readlinks = 0;
608	nfsstatsv1.readlink_bios = 0;
609	nfsstatsv1.biocache_readdirs = 0;
610	nfsstatsv1.readdir_bios = 0;
611	nfsstatsv1.rpcretries = 0;
612	nfsstatsv1.rpcrequests = 0;
613	nfsstatsv1.rpctimeouts = 0;
614	nfsstatsv1.rpcunexpected = 0;
615	nfsstatsv1.rpcinvalid = 0;
616	bzero(nfsstatsv1.rpccnt,
617	sizeof(nfsstatsv1.rpccnt));
618	}
619	if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
620	nfsstatsv1.srvrpc_errs = 0;
621	nfsstatsv1.srv_errs = 0;
622	nfsstatsv1.srvcache_inproghits = 0;
623	nfsstatsv1.srvcache_idemdonehits = 0;
624	nfsstatsv1.srvcache_nonidemdonehits = 0;
625	nfsstatsv1.srvcache_misses = 0;
626	nfsstatsv1.srvcache_tcppeak = 0;
627	bzero(nfsstatsv1.srvrpccnt,
628	sizeof(nfsstatsv1.srvrpccnt));
629	bzero(nfsstatsv1.cbrpccnt,
630	sizeof(nfsstatsv1.cbrpccnt));
631	}
632	}
633	goto out;
634	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
635	u_short sockport;
636	struct nfsuserd_args nargs;
637
638	if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) {
639	error = copyin(uap->argp, (caddr_t)&sockport,
640	sizeof (u_short));
641	if (error == 0) {
642	nargs.nuserd_family = AF_INET;
643	nargs.nuserd_port = sockport;
644	}
645	} else {
646	/*
647	* New nfsuserd_args structure, which indicates
648	* which IP version to use along with the port#.
649	*/
650	error = copyin(uap->argp, &nargs, sizeof(nargs));
651	}
652	if (!error)
653	error = nfsrv_nfsuserdport(&nargs, p);
654	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
655	nfsrv_nfsuserddelport();
656	error = 0;
657	}
658
659	out:
660	NFSEXITCODE(error);
661	return (error);
662	}
663
664	/*
665	* called by all three modevent routines, so that it gets things
666	* initialized soon enough.
667	*/
668	void
669	newnfs_portinit(void)
670	{
671	static int inited = 0;
672
673	if (inited)
674	return;
675	inited = 1;
676	/* Initialize SMP locks used by both client and server. */
677	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
678	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
679	mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, MTX_DEF);
680	}
681
682	/*
683	* Determine if the file system supports NFSv4 ACLs.
684	* Return 1 if it does, 0 otherwise.
685	*/
686	int
687	nfs_supportsnfsv4acls(struct vnode *vp)
688	{
689	int error;
690	long retval;
691
692	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
693
694	if (nfsrv_useacl == 0)
695	return (0);
696	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
697	if (error == 0 && retval != 0)
698	return (1);
699	return (0);
700	}
701
702	/*
703	* These are the first fields of all the context structures passed into
704	* nfs_pnfsio().
705	*/
706	struct pnfsio {
707	int done;
708	int inprog;
709	struct task tsk;
710	};
711
712	/*
713	* Do a mirror I/O on a pNFS thread.
714	*/
715	int
716	nfs_pnfsio(task_fn_t func, void context)
717	{
718	struct pnfsio *pio;
719	int ret;
720	static struct taskqueue *pnfsioq = NULL;
721
722	pio = (struct pnfsio *)context;
723	if (pnfsioq == NULL) {
724	if (nfs_pnfsiothreads == 0)
725	return (EPERM);
726	if (nfs_pnfsiothreads < 0)
727	nfs_pnfsiothreads = mp_ncpus * 4;
728	pnfsioq = taskqueue_create("pnfsioq", M_WAITOK,
729	taskqueue_thread_enqueue, &pnfsioq);
730	if (pnfsioq == NULL)
731	return (ENOMEM);
732	ret = taskqueue_start_threads(&pnfsioq, nfs_pnfsiothreads,
733	0, "pnfsiot");
734	if (ret != 0) {
735	taskqueue_free(pnfsioq);
736	pnfsioq = NULL;
737	return (ret);
738	}
739	}
740	pio->inprog = 1;
741	TASK_INIT(&pio->tsk, 0, func, context);
742	ret = taskqueue_enqueue(pnfsioq, &pio->tsk);
743	if (ret != 0)
744	pio->inprog = 0;
745	return (ret);
746	}
747
748	extern int (nfsd_call_nfscommon)(struct thread , struct nfssvc_args *);
749
750	/*
751	* Called once to initialize data structures...
752	*/
753	static int
754	nfscommon_modevent(module_t mod, int type, void *data)
755	{
756	int error = 0;
757	static int loaded = 0;
758
759	switch (type) {
760	case MOD_LOAD:
761	if (loaded)
762	goto out;
763	newnfs_portinit();
764	mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
765	mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
766	mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
767	mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
768	mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
769	MTX_DEF);
770	mtx_init(&nfsrv_dslock_mtx, "nfs4ds", NULL, MTX_DEF);
771	TAILQ_INIT(&nfsrv_devidhead);
772	callout_init(&newnfsd_callout, 1);
773	newnfs_init();
774	nfsd_call_nfscommon = nfssvc_nfscommon;
775	loaded = 1;
776	break;
777
778	case MOD_UNLOAD:
779	if (newnfs_numnfsd != 0 \|\| nfsrv_nfsuserd != NOTRUNNING \|\|
780	nfs_numnfscbd != 0) {
781	error = EBUSY;
782	break;
783	}
784
785	nfsd_call_nfscommon = NULL;
786	callout_drain(&newnfsd_callout);
787	/* Clean out the name<-->id cache. */
788	nfsrv_cleanusergroup();
789	/* and get rid of the mutexes */
790	mtx_destroy(&nfs_nameid_mutex);
791	mtx_destroy(&newnfsd_mtx);
792	mtx_destroy(&nfs_state_mutex);
793	mtx_destroy(&nfs_clstate_mutex);
794	mtx_destroy(&nfs_sockl_mutex);
795	mtx_destroy(&nfs_slock_mutex);
796	mtx_destroy(&nfs_req_mutex);
797	mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
798	mtx_destroy(&nfsrv_dslock_mtx);
799	loaded = 0;
800	break;
801	default:
802	error = EOPNOTSUPP;
803	break;
804	}
805
806	out:
807	NFSEXITCODE(error);
808	return error;
809	}
810	static moduledata_t nfscommon_mod = {
811	"nfscommon",
812	nfscommon_modevent,
813	NULL,
814	};
815	DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
816
817	/* So that loader and kldload(2) can find us, wherever we are.. */
818	MODULE_VERSION(nfscommon, 1);
819	MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
820	MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);

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