network - Tokenize NFS, fix MP races
[dragonfly.git] / sys / vfs / nfs / nfs_vfsops.c
CommitLineData
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1/*
2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. 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 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
37 * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $
df0a038e 38 * $DragonFly: src/sys/vfs/nfs/nfs_vfsops.c,v 1.54 2008/07/31 20:23:40 swildner Exp $
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39 */
40
41#include "opt_bootp.h"
0e8ff41a 42#include "opt_nfsroot.h"
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43
44#include <sys/param.h>
45#include <sys/sockio.h>
46#include <sys/proc.h>
47#include <sys/vnode.h>
9ba76b73 48#include <sys/fcntl.h>
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49#include <sys/kernel.h>
50#include <sys/sysctl.h>
51#include <sys/malloc.h>
52#include <sys/mount.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/socketvar.h>
56#include <sys/systm.h>
57
58#include <vm/vm.h>
59#include <vm/vm_extern.h>
60#include <vm/vm_zone.h>
61
62#include <net/if.h>
63#include <net/route.h>
64#include <netinet/in.h>
65
165dba55 66#include <sys/thread2.h>
8684e6f9 67#include <sys/mutex2.h>
165dba55 68
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69#include "rpcv2.h"
70#include "nfsproto.h"
71#include "nfs.h"
1f2de5d4 72#include "nfsmount.h"
c1cf1e59 73#include "nfsnode.h"
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MD
74#include "xdr_subs.h"
75#include "nfsm_subs.h"
76#include "nfsdiskless.h"
0e8ff41a 77#include "nfsmountrpc.h"
984263bc 78
c8a30e1e
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79extern int nfs_mountroot(struct mount *mp);
80extern void bootpc_init(void);
984263bc 81
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MD
82extern struct vop_ops nfsv2_vnode_vops;
83extern struct vop_ops nfsv2_fifo_vops;
84extern struct vop_ops nfsv2_spec_vops;
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85
86MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
87MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
88MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure");
89MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
90MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor");
91MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure");
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92MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables");
93
94vm_zone_t nfsmount_zone;
95
96struct nfsstats nfsstats;
97SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
98SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
99 &nfsstats, nfsstats, "");
100static int nfs_ip_paranoia = 1;
101SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
102 &nfs_ip_paranoia, 0, "");
103#ifdef NFS_DEBUG
104int nfs_debug;
105SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
106#endif
107
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108/*
109 * Tunable to determine the Read/Write unit size. Maximum value
110 * is NFS_MAXDATA. We also default to NFS_MAXDATA.
111 */
112static int nfs_io_size = NFS_MAXDATA;
113SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW,
114 &nfs_io_size, 0, "NFS optimal I/O unit size");
115
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116static void nfs_decode_args (struct nfsmount *nmp,
117 struct nfs_args *argp);
118static int mountnfs (struct nfs_args *,struct mount *,
119 struct sockaddr *,char *,char *,struct vnode **);
120static int nfs_mount ( struct mount *mp, char *path, caddr_t data,
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121 struct ucred *cred);
122static int nfs_unmount ( struct mount *mp, int mntflags);
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123static int nfs_root ( struct mount *mp, struct vnode **vpp);
124static int nfs_statfs ( struct mount *mp, struct statfs *sbp,
acde96db 125 struct ucred *cred);
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126static int nfs_statvfs(struct mount *mp, struct statvfs *sbp,
127 struct ucred *cred);
87de5057 128static int nfs_sync ( struct mount *mp, int waitfor);
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129
130/*
131 * nfs vfs operations.
132 */
133static struct vfsops nfs_vfsops = {
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134 .vfs_mount = nfs_mount,
135 .vfs_unmount = nfs_unmount,
136 .vfs_root = nfs_root,
137 .vfs_statfs = nfs_statfs,
2ef35c61 138 .vfs_statvfs = nfs_statvfs,
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HP
139 .vfs_sync = nfs_sync,
140 .vfs_init = nfs_init,
141 .vfs_uninit = nfs_uninit
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142};
143VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK);
144
145/*
146 * This structure must be filled in by a primary bootstrap or bootstrap
147 * server for a diskless/dataless machine. It is initialized below just
148 * to ensure that it is allocated to initialized data (.data not .bss).
149 */
150struct nfs_diskless nfs_diskless = { { { 0 } } };
151struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
152int nfs_diskless_valid = 0;
153
2ef35c61 154SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
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155 &nfs_diskless_valid, 0, "");
156
157SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
158 nfsv3_diskless.root_hostnam, 0, "");
159
160SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
161 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
162 "%Ssockaddr_in", "");
163
164SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD,
165 nfsv3_diskless.swap_hostnam, 0, "");
166
167SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD,
2ef35c61 168 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr,
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169 "%Ssockaddr_in","");
170
171
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172void nfsargs_ntoh (struct nfs_args *);
173static int nfs_mountdiskless (char *, char *, int,
984263bc 174 struct sockaddr_in *, struct nfs_args *,
dadab5e9 175 struct thread *, struct vnode **,
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RG
176 struct mount **);
177static void nfs_convert_diskless (void);
178static void nfs_convert_oargs (struct nfs_args *args,
179 struct onfs_args *oargs);
984263bc 180
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181/*
182 * Calculate the buffer I/O block size to use. The maximum V2 block size
183 * is typically 8K, the maximum datagram size is typically 16K, and the
184 * maximum V3 block size is typically 32K. The buffer cache tends to work
185 * best with 16K blocks but we allow 32K for TCP connections.
186 *
187 * We force the block size to be at least a page for buffer cache efficiency.
188 */
3fcb1ab8 189static int
eefb74c1 190nfs_iosize(int v3, int sotype)
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191{
192 int iosize;
eefb74c1 193 int iomax;
984263bc 194
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195 if (v3) {
196 if (sotype == SOCK_STREAM)
197 iomax = NFS_MAXDATA;
198 else
199 iomax = NFS_MAXDGRAMDATA;
200 } else {
201 iomax = NFS_V2MAXDATA;
202 }
203 if ((iosize = nfs_io_size) > iomax)
204 iosize = iomax;
205 if (iosize < PAGE_SIZE)
206 iosize = PAGE_SIZE;
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207
208 /*
209 * This is an aweful hack but until the buffer cache is rewritten
210 * we need it. The problem is that when you combine write() with
211 * mmap() the vm_page->valid bits can become weird looking
212 * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers
213 * at the file EOF. To solve the problem the BIO system needs to
214 * be guarenteed that the NFS iosize for regular files will be a
215 * multiple of PAGE_SIZE so it can invalidate the whole page
216 * rather then just the piece of it owned by the buffer when
217 * NFS does vinvalbuf() calls.
218 */
219 if (iosize & PAGE_MASK)
220 iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE;
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221 return iosize;
222}
223
224static void
3fcb1ab8 225nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
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226{
227 args->version = NFS_ARGSVERSION;
228 args->addr = oargs->addr;
229 args->addrlen = oargs->addrlen;
230 args->sotype = oargs->sotype;
231 args->proto = oargs->proto;
232 args->fh = oargs->fh;
233 args->fhsize = oargs->fhsize;
234 args->flags = oargs->flags;
235 args->wsize = oargs->wsize;
236 args->rsize = oargs->rsize;
237 args->readdirsize = oargs->readdirsize;
238 args->timeo = oargs->timeo;
239 args->retrans = oargs->retrans;
240 args->maxgrouplist = oargs->maxgrouplist;
241 args->readahead = oargs->readahead;
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242 args->deadthresh = oargs->deadthresh;
243 args->hostname = oargs->hostname;
244}
245
246static void
3fcb1ab8 247nfs_convert_diskless(void)
984263bc 248{
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MD
249 int i;
250
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251 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif,
252 sizeof(struct ifaliasreq));
253 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
254 sizeof(struct sockaddr_in));
255 nfs_convert_oargs(&nfsv3_diskless.swap_args,&nfs_diskless.swap_args);
0e8ff41a 256
984263bc 257 bcopy(nfs_diskless.swap_fh,nfsv3_diskless.swap_fh,NFSX_V2FH);
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MD
258 nfsv3_diskless.swap_fhsize = NFSX_V2FH;
259 for (i = NFSX_V2FH - 1; i >= 0; --i) {
260 if (nfs_diskless.swap_fh[i])
261 break;
262 }
263 if (i < 0)
264 nfsv3_diskless.swap_fhsize = 0;
265
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266 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr,
267 sizeof(struct sockaddr_in));
268 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN);
269 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks;
270 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred,
271 sizeof(struct ucred));
272 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args);
0e8ff41a 273
984263bc 274 bcopy(nfs_diskless.root_fh,nfsv3_diskless.root_fh,NFSX_V2FH);
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MD
275 nfsv3_diskless.root_fhsize = NFSX_V2FH;
276 for (i = NFSX_V2FH - 1; i >= 0; --i) {
277 if (nfs_diskless.root_fh[i])
278 break;
279 }
280 if (i < 0)
281 nfsv3_diskless.root_fhsize = 0;
282
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283 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
284 sizeof(struct sockaddr_in));
285 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN);
286 nfsv3_diskless.root_time = nfs_diskless.root_time;
287 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam,
288 MAXHOSTNAMELEN);
289 nfs_diskless_valid = 3;
290}
291
292/*
293 * nfs statfs call
294 */
295int
acde96db 296nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
984263bc 297{
40393ded
RG
298 struct vnode *vp;
299 struct nfs_statfs *sfp;
984263bc 300 struct nfsmount *nmp = VFSTONFS(mp);
acde96db 301 thread_t td = curthread;
42edf14f 302 int error = 0, retattr;
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MD
303 struct nfsnode *np;
304 u_quad_t tquad;
42edf14f
MD
305 struct nfsm_info info;
306
307 info.mrep = NULL;
308 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
984263bc 309
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310 lwkt_gettoken(&nmp->nm_token);
311
984263bc 312#ifndef nolint
60233e58 313 sfp = NULL;
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MD
314#endif
315 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
c6b43e93
MD
316 if (error) {
317 lwkt_reltoken(&nmp->nm_token);
984263bc 318 return (error);
c6b43e93 319 }
984263bc 320 vp = NFSTOV(np);
acde96db 321 /* ignore the passed cred */
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MD
322 cred = crget();
323 cred->cr_ngroups = 1;
42edf14f 324 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
3b568787 325 (void)nfs_fsinfo(nmp, vp, td);
984263bc 326 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
42edf14f
MD
327 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
328 ERROROUT(nfsm_fhtom(&info, vp));
329 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
330 if (info.v3) {
331 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
332 NFS_LATTR_NOSHRINK));
333 }
984263bc 334 if (error) {
42edf14f
MD
335 if (info.mrep != NULL)
336 m_freem(info.mrep);
984263bc
MD
337 goto nfsmout;
338 }
42edf14f 339 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
984263bc 340 sbp->f_flags = nmp->nm_flag;
eefb74c1 341
42edf14f 342 if (info.v3) {
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MD
343 sbp->f_bsize = NFS_FABLKSIZE;
344 tquad = fxdr_hyper(&sfp->sf_tbytes);
345 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
346 tquad = fxdr_hyper(&sfp->sf_fbytes);
347 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
348 tquad = fxdr_hyper(&sfp->sf_abytes);
349 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
350 sbp->f_files = (fxdr_unsigned(int32_t,
351 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
352 sbp->f_ffree = (fxdr_unsigned(int32_t,
353 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
354 } else {
355 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
356 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
357 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
358 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
359 sbp->f_files = 0;
360 sbp->f_ffree = 0;
361 }
b672fc16
MD
362
363 /*
364 * Some values are pre-set in mnt_stat. Note in particular f_iosize
365 * cannot be changed once the filesystem is mounted as it is used
366 * as the basis for BIOs.
367 */
984263bc
MD
368 if (sbp != &mp->mnt_stat) {
369 sbp->f_type = mp->mnt_vfc->vfc_typenum;
984263bc 370 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
b672fc16 371 sbp->f_iosize = mp->mnt_stat.f_iosize;
984263bc 372 }
42edf14f
MD
373 m_freem(info.mrep);
374 info.mrep = NULL;
6b08710e 375nfsmout:
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376 vput(vp);
377 crfree(cred);
c6b43e93 378 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
379 return (error);
380}
381
2ef35c61
AH
382static int
383nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
384{
385 struct vnode *vp;
386 struct nfs_statfs *sfp;
387 struct nfsmount *nmp = VFSTONFS(mp);
388 thread_t td = curthread;
389 int error = 0, retattr;
390 struct nfsnode *np;
391 struct nfsm_info info;
392
393 info.mrep = NULL;
394 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
c6b43e93 395 lwkt_gettoken(&nmp->nm_token);
2ef35c61
AH
396
397#ifndef nolint
398 sfp = NULL;
399#endif
400 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
c6b43e93
MD
401 if (error) {
402 lwkt_reltoken(&nmp->nm_token);
2ef35c61 403 return (error);
c6b43e93 404 }
2ef35c61
AH
405 vp = NFSTOV(np);
406 /* ignore the passed cred */
407 cred = crget();
408 cred->cr_ngroups = 1;
409 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
410 (void)nfs_fsinfo(nmp, vp, td);
411 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
412 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
413 ERROROUT(nfsm_fhtom(&info, vp));
414 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
415 if (info.v3) {
416 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
417 NFS_LATTR_NOSHRINK));
418 }
419 if (error) {
420 if (info.mrep != NULL)
421 m_freem(info.mrep);
422 goto nfsmout;
423 }
424 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
425 sbp->f_flag = nmp->nm_flag;
426 sbp->f_owner = nmp->nm_cred->cr_ruid;
427
428 if (info.v3) {
429 sbp->f_bsize = NFS_FABLKSIZE;
430 sbp->f_frsize = NFS_FABLKSIZE;
431 sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) /
432 ((u_quad_t)NFS_FABLKSIZE));
433 sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) /
434 ((u_quad_t)NFS_FABLKSIZE));
435 sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) /
436 ((u_quad_t)NFS_FABLKSIZE));
437 sbp->f_files = fxdr_hyper(&sfp->sf_tfiles);
438 sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles);
439 sbp->f_favail = fxdr_hyper(&sfp->sf_afiles);
440 } else {
441 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
442 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
443 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
444 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
445 sbp->f_files = 0;
446 sbp->f_ffree = 0;
447 sbp->f_favail = 0;
448 }
449 sbp->f_syncreads = 0;
450 sbp->f_syncwrites = 0;
451 sbp->f_asyncreads = 0;
452 sbp->f_asyncwrites = 0;
453 sbp->f_type = mp->mnt_vfc->vfc_typenum;
454
455 m_freem(info.mrep);
456 info.mrep = NULL;
457nfsmout:
458 vput(vp);
459 crfree(cred);
c6b43e93 460 lwkt_reltoken(&nmp->nm_token);
2ef35c61
AH
461 return (error);
462}
463
984263bc
MD
464/*
465 * nfs version 3 fsinfo rpc call
466 */
467int
3b568787 468nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
984263bc 469{
40393ded 470 struct nfsv3_fsinfo *fsp;
42edf14f 471 u_int32_t pref, max;
984263bc 472 int error = 0, retattr;
984263bc 473 u_int64_t maxfsize;
42edf14f 474 struct nfsm_info info;
984263bc 475
42edf14f 476 info.v3 = 1;
984263bc 477 nfsstats.rpccnt[NFSPROC_FSINFO]++;
42edf14f
MD
478 nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1));
479 ERROROUT(nfsm_fhtom(&info, vp));
480 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td,
481 nfs_vpcred(vp, ND_READ), &error));
482 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK));
483 if (error == 0) {
484 NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO));
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485 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
486 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
487 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
488 ~(NFS_FABLKSIZE - 1);
489 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
490 if (max < nmp->nm_wsize && max > 0) {
491 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
492 if (nmp->nm_wsize == 0)
493 nmp->nm_wsize = max;
494 }
495 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
496 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
497 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
498 ~(NFS_FABLKSIZE - 1);
499 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
500 if (max < nmp->nm_rsize && max > 0) {
501 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
502 if (nmp->nm_rsize == 0)
503 nmp->nm_rsize = max;
504 }
505 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
506 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
507 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
508 ~(NFS_DIRBLKSIZ - 1);
509 if (max < nmp->nm_readdirsize && max > 0) {
510 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
511 if (nmp->nm_readdirsize == 0)
512 nmp->nm_readdirsize = max;
513 }
514 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
515 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
516 nmp->nm_maxfilesize = maxfsize;
517 nmp->nm_state |= NFSSTA_GOTFSINFO;
b672fc16
MD
518
519 /*
520 * Use the smaller of rsize/wsize for the biosize.
521 */
522 if (nmp->nm_rsize < nmp->nm_wsize)
523 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize;
524 else
525 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize;
984263bc 526 }
42edf14f
MD
527 m_freem(info.mrep);
528 info.mrep = NULL;
6b08710e 529nfsmout:
984263bc
MD
530 return (error);
531}
532
533/*
534 * Mount a remote root fs via. nfs. This depends on the info in the
535 * nfs_diskless structure that has been filled in properly by some primary
536 * bootstrap.
537 * It goes something like this:
538 * - do enough of "ifconfig" by calling ifioctl() so that the system
539 * can talk to the server
540 * - If nfs_diskless.mygateway is filled in, use that address as
541 * a default gateway.
542 * - build the rootfs mount point and call mountnfs() to do the rest.
543 */
544int
acde96db 545nfs_mountroot(struct mount *mp)
984263bc
MD
546{
547 struct mount *swap_mp;
548 struct nfsv3_diskless *nd = &nfsv3_diskless;
549 struct socket *so;
550 struct vnode *vp;
dadab5e9 551 struct thread *td = curthread; /* XXX */
984263bc
MD
552 int error, i;
553 u_long l;
554 char buf[128];
555
556#if defined(BOOTP_NFSROOT) && defined(BOOTP)
557 bootpc_init(); /* use bootp to get nfs_diskless filled in */
558#endif
559
560 /*
561 * XXX time must be non-zero when we init the interface or else
562 * the arp code will wedge...
563 */
3a6f9faf
MD
564 while (mycpu->gd_time_seconds == 0)
565 tsleep(mycpu, 0, "arpkludge", 10);
984263bc 566
a2103e90
MD
567 /*
568 * The boot code may have passed us a diskless structure.
569 */
2ef35c61 570 if (nfs_diskless_valid == 1)
0b9984b8
MD
571 nfs_convert_diskless();
572
a2103e90 573#define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr))
086c1d7e 574 kprintf("nfs_mountroot: interface %s ip %s",
2ef35c61 575 nd->myif.ifra_name,
a2103e90 576 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr));
2ef35c61 577 kprintf(" bcast %s",
a2103e90 578 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr));
2ef35c61 579 kprintf(" mask %s\n",
a2103e90
MD
580 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr));
581#undef SINP
984263bc
MD
582
583 /*
584 * XXX splnet, so networks will receive...
585 */
165dba55 586 crit_enter();
984263bc 587
984263bc 588 /*
a2103e90 589 * BOOTP does not necessarily have to be compiled into the kernel
2ef35c61 590 * for an NFS root to work. If we inherited the network
a2103e90
MD
591 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured
592 * out our interface for us and all we need to do is ifconfig the
593 * interface. We only do this if the interface has not already been
594 * ifconfig'd by e.g. BOOTP.
984263bc 595 */
dadab5e9 596 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
a2103e90 597 if (error) {
984263bc
MD
598 panic("nfs_mountroot: socreate(%04x): %d",
599 nd->myif.ifra_addr.sa_family, error);
984263bc 600 }
a2103e90 601
87de5057 602 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred);
984263bc
MD
603 if (error)
604 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
a2103e90 605
9ba76b73 606 soclose(so, FNONBLOCK);
984263bc
MD
607
608 /*
609 * If the gateway field is filled in, set it as the default route.
610 */
611 if (nd->mygateway.sin_len != 0) {
612 struct sockaddr_in mask, sin;
613
614 bzero((caddr_t)&mask, sizeof(mask));
615 sin = mask;
616 sin.sin_family = AF_INET;
617 sin.sin_len = sizeof(sin);
086c1d7e 618 kprintf("nfs_mountroot: gateway %s\n",
0b9984b8 619 inet_ntoa(nd->mygateway.sin_addr));
ecdefdda
MD
620 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin,
621 (struct sockaddr *)&nd->mygateway,
622 (struct sockaddr *)&mask,
623 RTF_UP | RTF_GATEWAY);
984263bc 624 if (error)
086c1d7e 625 kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error);
984263bc
MD
626 }
627
628 /*
629 * Create the rootfs mount point.
630 */
631 nd->root_args.fh = nd->root_fh;
632 nd->root_args.fhsize = nd->root_fhsize;
633 l = ntohl(nd->root_saddr.sin_addr.s_addr);
f8c7a42d 634 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
984263bc
MD
635 (l >> 24) & 0xff, (l >> 16) & 0xff,
636 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
5dacbb2e 637 kprintf("NFS_ROOT: %s\n",buf);
984263bc 638 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY,
dadab5e9 639 &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) {
5dacbb2e 640 mp->mnt_vfc->vfc_refcount--;
0b9984b8 641 crit_exit();
984263bc
MD
642 return (error);
643 }
644
645 swap_mp = NULL;
646 if (nd->swap_nblks) {
647
648 /* Convert to DEV_BSIZE instead of Kilobyte */
649 nd->swap_nblks *= 2;
650
651 /*
652 * Create a fake mount point just for the swap vnode so that the
653 * swap file can be on a different server from the rootfs.
654 */
655 nd->swap_args.fh = nd->swap_fh;
656 nd->swap_args.fhsize = nd->swap_fhsize;
657 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
f8c7a42d 658 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
984263bc
MD
659 (l >> 24) & 0xff, (l >> 16) & 0xff,
660 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
086c1d7e 661 kprintf("NFS SWAP: %s\n",buf);
984263bc 662 if ((error = nfs_mountdiskless(buf, "/swap", 0,
0b9984b8
MD
663 &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0) {
664 crit_exit();
984263bc 665 return (error);
0b9984b8 666 }
f9642f56 667 vfs_unbusy(swap_mp);
984263bc 668
2ef35c61 669 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
984263bc 670 nd->swap_nblks * DEV_BSIZE ;
2ef35c61 671
984263bc
MD
672 /*
673 * Since the swap file is not the root dir of a file system,
674 * hack it to a regular file.
675 */
2247fe02 676 vclrflags(vp, VROOT);
597aea93 677 vref(vp);
1c843a13 678 nfs_setvtype(vp, VREG);
e4c9c0c8 679 swaponvp(td, vp, nd->swap_nblks);
984263bc
MD
680 }
681
682 mp->mnt_flag |= MNT_ROOTFS;
f9642f56 683 vfs_unbusy(mp);
984263bc
MD
684
685 /*
686 * This is not really an nfs issue, but it is much easier to
687 * set hostname here and then let the "/etc/rc.xxx" files
688 * mount the right /var based upon its preset value.
689 */
690 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
691 hostname[MAXHOSTNAMELEN - 1] = '\0';
692 for (i = 0; i < MAXHOSTNAMELEN; i++)
693 if (hostname[i] == '\0')
694 break;
695 inittodr(ntohl(nd->root_time));
0b9984b8 696 crit_exit();
984263bc
MD
697 return (0);
698}
699
700/*
701 * Internal version of mount system call for diskless setup.
702 */
703static int
dadab5e9
MD
704nfs_mountdiskless(char *path, char *which, int mountflag,
705 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
706 struct vnode **vpp, struct mount **mpp)
984263bc
MD
707{
708 struct mount *mp;
709 struct sockaddr *nam;
984263bc 710 int didalloc = 0;
0e8ff41a 711 int error;
984263bc
MD
712
713 mp = *mpp;
714
715 if (mp == NULL) {
716 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
086c1d7e 717 kprintf("nfs_mountroot: NFS not configured");
984263bc
MD
718 return (error);
719 }
720 didalloc = 1;
721 }
984263bc
MD
722 mp->mnt_kern_flag = 0;
723 mp->mnt_flag = mountflag;
cfa2ba21 724 nam = dup_sockaddr((struct sockaddr *)sin);
0e8ff41a
MD
725
726#if defined(BOOTP) || defined(NFS_ROOT)
727 if (args->fhsize == 0) {
df0a038e
SW
728 char *xpath = path;
729
086c1d7e 730 kprintf("NFS_ROOT: No FH passed from loader, attempting mount rpc...");
5dacbb2e
MD
731 while (*xpath && *xpath != ':')
732 ++xpath;
733 if (*xpath)
734 ++xpath;
0e8ff41a 735 args->fhsize = 0;
5dacbb2e 736 error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td);
0e8ff41a 737 if (error) {
5dacbb2e 738 kprintf("failed error %d.\n", error);
0e8ff41a
MD
739 goto haderror;
740 }
086c1d7e 741 kprintf("success!\n");
0e8ff41a
MD
742 }
743#endif
744
984263bc 745 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
04ef15fb 746#if defined(BOOTP) || defined(NFS_ROOT)
0e8ff41a 747haderror:
04ef15fb 748#endif
086c1d7e 749 kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error);
984263bc 750 mp->mnt_vfc->vfc_refcount--;
f9642f56 751 vfs_unbusy(mp);
984263bc 752 if (didalloc)
efda3bd0 753 kfree(mp, M_MOUNT);
984263bc
MD
754 FREE(nam, M_SONAME);
755 return (error);
756 }
984263bc
MD
757 *mpp = mp;
758 return (0);
759}
760
761static void
3fcb1ab8 762nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
984263bc 763{
984263bc
MD
764 int adjsock;
765 int maxio;
766
165dba55 767 crit_enter();
984263bc
MD
768 /*
769 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
770 * no sense in that context.
771 */
e20dbf61 772 if (nmp->nm_sotype == SOCK_STREAM)
984263bc
MD
773 nmp->nm_flag &= ~NFSMNT_NOCONN;
774
775 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
776 if ((argp->flags & NFSMNT_NFSV3) == 0)
777 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
778
e20dbf61
MD
779 /*
780 * Re-bind if rsrvd port flag has changed
781 */
782 adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) !=
783 (argp->flags & NFSMNT_RESVPORT);
984263bc
MD
784
785 /* Update flags atomically. Don't change the lock bits. */
786 nmp->nm_flag = argp->flags | nmp->nm_flag;
165dba55 787 crit_exit();
984263bc
MD
788
789 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
790 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
791 if (nmp->nm_timeo < NFS_MINTIMEO)
792 nmp->nm_timeo = NFS_MINTIMEO;
793 else if (nmp->nm_timeo > NFS_MAXTIMEO)
794 nmp->nm_timeo = NFS_MAXTIMEO;
795 }
796
797 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
798 nmp->nm_retry = argp->retrans;
799 if (nmp->nm_retry > NFS_MAXREXMIT)
800 nmp->nm_retry = NFS_MAXREXMIT;
801 }
802
e20dbf61
MD
803 /*
804 * These parameters effect the buffer cache and cannot be changed
805 * once we've successfully mounted.
806 */
807 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
808 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype);
809
810 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
811 nmp->nm_wsize = argp->wsize;
812 /* Round down to multiple of blocksize */
813 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
814 if (nmp->nm_wsize <= 0)
815 nmp->nm_wsize = NFS_FABLKSIZE;
816 }
817 if (nmp->nm_wsize > maxio)
818 nmp->nm_wsize = maxio;
819 if (nmp->nm_wsize > MAXBSIZE)
820 nmp->nm_wsize = MAXBSIZE;
821
822 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
823 nmp->nm_rsize = argp->rsize;
824 /* Round down to multiple of blocksize */
825 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
826 if (nmp->nm_rsize <= 0)
827 nmp->nm_rsize = NFS_FABLKSIZE;
828 }
829 if (nmp->nm_rsize > maxio)
830 nmp->nm_rsize = maxio;
831 if (nmp->nm_rsize > MAXBSIZE)
832 nmp->nm_rsize = MAXBSIZE;
833
834 if ((argp->flags & NFSMNT_READDIRSIZE) &&
835 argp->readdirsize > 0) {
836 nmp->nm_readdirsize = argp->readdirsize;
837 }
838 if (nmp->nm_readdirsize > maxio)
839 nmp->nm_readdirsize = maxio;
840 if (nmp->nm_readdirsize > nmp->nm_rsize)
841 nmp->nm_readdirsize = nmp->nm_rsize;
984263bc 842 }
984263bc
MD
843
844 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
845 nmp->nm_acregmin = argp->acregmin;
846 else
847 nmp->nm_acregmin = NFS_MINATTRTIMO;
848 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
849 nmp->nm_acregmax = argp->acregmax;
850 else
851 nmp->nm_acregmax = NFS_MAXATTRTIMO;
852 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
853 nmp->nm_acdirmin = argp->acdirmin;
854 else
855 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
856 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
857 nmp->nm_acdirmax = argp->acdirmax;
858 else
859 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
860 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
861 nmp->nm_acdirmin = nmp->nm_acdirmax;
862 if (nmp->nm_acregmin > nmp->nm_acregmax)
863 nmp->nm_acregmin = nmp->nm_acregmax;
864
865 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
866 if (argp->maxgrouplist <= NFS_MAXGRPS)
867 nmp->nm_numgrps = argp->maxgrouplist;
868 else
869 nmp->nm_numgrps = NFS_MAXGRPS;
870 }
871 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
872 if (argp->readahead <= NFS_MAXRAHEAD)
873 nmp->nm_readahead = argp->readahead;
874 else
875 nmp->nm_readahead = NFS_MAXRAHEAD;
876 }
984263bc 877 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
e07fef60 878 if (argp->deadthresh <= NFS_NEVERDEAD)
984263bc
MD
879 nmp->nm_deadthresh = argp->deadthresh;
880 else
e07fef60 881 nmp->nm_deadthresh = NFS_NEVERDEAD;
984263bc
MD
882 }
883
984263bc
MD
884 if (nmp->nm_so && adjsock) {
885 nfs_safedisconnect(nmp);
886 if (nmp->nm_sotype == SOCK_DGRAM)
60233e58 887 while (nfs_connect(nmp, NULL)) {
086c1d7e 888 kprintf("nfs_args: retrying connect\n");
377d4740 889 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
984263bc
MD
890 }
891 }
892}
893
894/*
895 * VFS Operations.
896 *
897 * mount system call
898 * It seems a bit dumb to copyinstr() the host and path here and then
899 * bcopy() them in mountnfs(), but I wanted to detect errors before
900 * doing the sockargs() call because sockargs() allocates an mbuf and
901 * an error after that means that I have to release the mbuf.
902 */
903/* ARGSUSED */
904static int
acde96db 905nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
984263bc
MD
906{
907 int error;
908 struct nfs_args args;
909 struct sockaddr *nam;
910 struct vnode *vp;
911 char pth[MNAMELEN], hst[MNAMELEN];
912 size_t len;
913 u_char nfh[NFSX_V3FHMAX];
914
915 if (path == NULL) {
916 nfs_mountroot(mp);
917 return (0);
918 }
919 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
920 if (error)
921 return (error);
922 if (args.version != NFS_ARGSVERSION) {
923#ifdef COMPAT_PRELITE2
924 /*
925 * If the argument version is unknown, then assume the
926 * caller is a pre-lite2 4.4BSD client and convert its
927 * arguments.
928 */
929 struct onfs_args oargs;
930 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
931 if (error)
932 return (error);
933 nfs_convert_oargs(&args,&oargs);
934#else /* !COMPAT_PRELITE2 */
935 return (EPROGMISMATCH);
936#endif /* COMPAT_PRELITE2 */
937 }
938 if (mp->mnt_flag & MNT_UPDATE) {
40393ded 939 struct nfsmount *nmp = VFSTONFS(mp);
984263bc
MD
940
941 if (nmp == NULL)
942 return (EIO);
943 /*
944 * When doing an update, we can't change from or to
e20dbf61 945 * v3, or change cookie translation, or rsize or wsize.
984263bc 946 */
e20dbf61
MD
947 args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE);
948 args.flags |= nmp->nm_flag & (NFSMNT_NFSV3);
984263bc
MD
949 nfs_decode_args(nmp, &args);
950 return (0);
951 }
952
953 /*
954 * Make the nfs_ip_paranoia sysctl serve as the default connection
2ef35c61 955 * or no-connection mode for those protocols that support
984263bc
MD
956 * no-connection mode (the flag will be cleared later for protocols
957 * that do not support no-connection mode). This will allow a client
958 * to receive replies from a different IP then the request was
959 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
960 * not 0.
961 */
962 if (nfs_ip_paranoia == 0)
963 args.flags |= NFSMNT_NOCONN;
964 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
965 return (EINVAL);
966 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
967 if (error)
968 return (error);
969 error = copyinstr(path, pth, MNAMELEN-1, &len);
970 if (error)
971 return (error);
972 bzero(&pth[len], MNAMELEN - len);
973 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
974 if (error)
975 return (error);
976 bzero(&hst[len], MNAMELEN - len);
977 /* sockargs() call must be after above copyin() calls */
978 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
979 if (error)
980 return (error);
981 args.fh = nfh;
982 error = mountnfs(&args, mp, nam, pth, hst, &vp);
983 return (error);
984}
985
986/*
987 * Common code for mount and mountroot
988 */
989static int
dadab5e9
MD
990mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
991 char *pth, char *hst, struct vnode **vpp)
984263bc 992{
40393ded 993 struct nfsmount *nmp;
984263bc
MD
994 struct nfsnode *np;
995 int error;
13ddc895
MD
996 int rxcpu;
997 int txcpu;
984263bc
MD
998
999 if (mp->mnt_flag & MNT_UPDATE) {
1000 nmp = VFSTONFS(mp);
1001 /* update paths, file handles, etc, here XXX */
1002 FREE(nam, M_SONAME);
1003 return (0);
1004 } else {
1005 nmp = zalloc(nfsmount_zone);
1006 bzero((caddr_t)nmp, sizeof (struct nfsmount));
8684e6f9
MD
1007 mtx_init(&nmp->nm_rxlock);
1008 mtx_init(&nmp->nm_txlock);
984263bc 1009 TAILQ_INIT(&nmp->nm_uidlruhead);
81b5c339 1010 TAILQ_INIT(&nmp->nm_bioq);
e21aec5b 1011 TAILQ_INIT(&nmp->nm_reqq);
edb90c22
MD
1012 TAILQ_INIT(&nmp->nm_reqtxq);
1013 TAILQ_INIT(&nmp->nm_reqrxq);
984263bc 1014 mp->mnt_data = (qaddr_t)nmp;
c6b43e93 1015 lwkt_token_init(&nmp->nm_token, 1, "nfs_token");
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MD
1016 }
1017 vfs_getnewfsid(mp);
1018 nmp->nm_mountp = mp;
c6b43e93
MD
1019 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE;
1020
1021 lwkt_gettoken(&nmp->nm_token);
984263bc
MD
1022
1023 /*
1024 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
1025 * high, depending on whether we end up with negative offsets in
1026 * the client or server somewhere. 2GB-1 may be safer.
1027 *
1028 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
1029 * that we can handle until we find out otherwise.
1030 * XXX Our "safe" limit on the client is what we can store in our
1031 * buffer cache using signed(!) block numbers.
1032 */
1033 if ((argp->flags & NFSMNT_NFSV3) == 0)
1034 nmp->nm_maxfilesize = 0xffffffffLL;
1035 else
1036 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
1037
1038 nmp->nm_timeo = NFS_TIMEO;
1039 nmp->nm_retry = NFS_RETRANS;
eefb74c1
MD
1040 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype);
1041 nmp->nm_rsize = nmp->nm_wsize;
984263bc
MD
1042 nmp->nm_readdirsize = NFS_READDIRSIZE;
1043 nmp->nm_numgrps = NFS_MAXGRPS;
1044 nmp->nm_readahead = NFS_DEFRAHEAD;
0639df29 1045 nmp->nm_deadthresh = NFS_DEADTHRESH;
984263bc
MD
1046 nmp->nm_fhsize = argp->fhsize;
1047 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
1048 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
984263bc
MD
1049 nmp->nm_nam = nam;
1050 /* Set up the sockets and per-host congestion */
1051 nmp->nm_sotype = argp->sotype;
1052 nmp->nm_soproto = argp->proto;
3b568787 1053 nmp->nm_cred = crhold(proc0.p_ucred);
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MD
1054
1055 nfs_decode_args(nmp, argp);
1056
1057 /*
1058 * For Connection based sockets (TCP,...) defer the connect until
1059 * the first request, in case the server is not responding.
1060 */
1061 if (nmp->nm_sotype == SOCK_DGRAM &&
60233e58 1062 (error = nfs_connect(nmp, NULL)))
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MD
1063 goto bad;
1064
1065 /*
1066 * This is silly, but it has to be set so that vinifod() works.
1067 * We do not want to do an nfs_statfs() here since we can get
1068 * stuck on a dead server and we are holding a lock on the mount
1069 * point.
1070 */
2ef35c61 1071 mp->mnt_stat.f_iosize =
eefb74c1
MD
1072 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype);
1073
984263bc 1074 /*
0961aa92
MD
1075 * Install vop_ops for our vnops
1076 */
66a1ddf5
MD
1077 vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops);
1078 vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops);
1079 vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops);
0961aa92
MD
1080
1081 /*
984263bc
MD
1082 * A reference count is needed on the nfsnode representing the
1083 * remote root. If this object is not persistent, then backward
1084 * traversals of the mount point (i.e. "..") will not work if
1085 * the nfsnode gets flushed out of the cache. Ufs does not have
1086 * this problem, because one can identify root inodes by their
1087 * number == ROOTINO (2).
1088 */
1089 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1090 if (error)
1091 goto bad;
1092 *vpp = NFSTOV(np);
1093
1094 /*
eefb74c1
MD
1095 * Retrieval of mountpoint attributes is delayed until nfs_rot
1096 * or nfs_statfs are first called. This will happen either when
1097 * we first traverse the mount point or if somebody does a df(1).
1098 *
1099 * NFSSTA_GOTFSINFO is used to flag if we have successfully
1100 * retrieved mountpoint attributes. In the case of NFSv3 we
1101 * also flag static fsinfo.
984263bc 1102 */
eefb74c1
MD
1103 if (*vpp != NULL)
1104 (*vpp)->v_type = VNON;
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MD
1105
1106 /*
1107 * Lose the lock but keep the ref.
1108 */
a11aaa81 1109 vn_unlock(*vpp);
c6b43e93 1110 lwkt_gettoken(&nfs_token);
9a702b27 1111 TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry);
c6b43e93 1112 lwkt_reltoken(&nfs_token);
984263bc 1113
13ddc895
MD
1114#ifdef SMP
1115 switch(ncpus) {
1116 case 0:
f8565b0f 1117 case 1:
13ddc895
MD
1118 rxcpu = 0;
1119 txcpu = 0;
1120 break;
f8565b0f 1121 case 2:
13ddc895
MD
1122 rxcpu = 0;
1123 txcpu = 1;
1124 break;
1125 default:
1126 rxcpu = 1;
1127 txcpu = 2;
1128 break;
1129 }
1130#else
1131 rxcpu = 0;
1132 txcpu = 0;
1133#endif
1134
52e1cf57
MD
1135 /*
1136 * Start the reader and writer threads.
1137 */
1138 lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread,
fdce8919 1139 NULL, 0, rxcpu, "nfsiod_rx");
52e1cf57 1140 lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread,
fdce8919 1141 NULL, 0, txcpu, "nfsiod_tx");
c6b43e93 1142 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1143 return (0);
1144bad:
1145 nfs_disconnect(nmp);
c6b43e93 1146 lwkt_reltoken(&nmp->nm_token);
3b568787 1147 nfs_free_mount(nmp);
984263bc
MD
1148 return (error);
1149}
1150
1151/*
1152 * unmount system call
1153 */
1154static int
acde96db 1155nfs_unmount(struct mount *mp, int mntflags)
984263bc 1156{
40393ded 1157 struct nfsmount *nmp;
984263bc
MD
1158 int error, flags = 0;
1159
984263bc 1160 nmp = VFSTONFS(mp);
c6b43e93 1161 lwkt_gettoken(&nmp->nm_token);
d9adbeaf
MD
1162 if (mntflags & MNT_FORCE) {
1163 flags |= FORCECLOSE;
1164 nmp->nm_flag |= NFSMNT_FORCE;
1165 }
1166
984263bc
MD
1167 /*
1168 * Goes something like this..
1169 * - Call vflush() to clear out vnodes for this file system
1170 * - Close the socket
1171 * - Free up the data structures
1172 */
1173 /* In the forced case, cancel any outstanding requests. */
1174 if (flags & FORCECLOSE) {
1175 error = nfs_nmcancelreqs(nmp);
d9adbeaf
MD
1176 if (error) {
1177 kprintf("NFS: %s: Unable to cancel all requests\n",
1178 mp->mnt_stat.f_mntfromname);
1179 /* continue anyway */
1180 }
984263bc 1181 }
d9adbeaf 1182
984263bc 1183 /*
e07fef60 1184 * Must handshake with nfs_clientd() if it is active. XXX
984263bc
MD
1185 */
1186 nmp->nm_state |= NFSSTA_DISMINPROG;
984263bc 1187
d9adbeaf
MD
1188 /*
1189 * We hold 1 extra ref on the root vnode; see comment in mountnfs().
1190 *
1191 * If this doesn't work and we are doing a forced unmount we continue
1192 * anyway.
1193 */
984263bc
MD
1194 error = vflush(mp, 1, flags);
1195 if (error) {
1196 nmp->nm_state &= ~NFSSTA_DISMINPROG;
c6b43e93
MD
1197 if ((flags & FORCECLOSE) == 0) {
1198 lwkt_reltoken(&nmp->nm_token);
d9adbeaf 1199 return (error);
c6b43e93 1200 }
984263bc
MD
1201 }
1202
1203 /*
1204 * We are now committed to the unmount.
1205 * For NQNFS, let the server daemon free the nfsmount structure.
1206 */
e07fef60 1207 if (nmp->nm_flag & NFSMNT_KERB)
984263bc 1208 nmp->nm_state |= NFSSTA_DISMNT;
13ddc895 1209 nfssvc_iod_stop1(nmp);
984263bc 1210 nfs_disconnect(nmp);
13ddc895 1211 nfssvc_iod_stop2(nmp);
c6b43e93
MD
1212
1213 lwkt_gettoken(&nfs_token);
9a702b27 1214 TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry);
c6b43e93
MD
1215 lwkt_reltoken(&nfs_token);
1216
1217 lwkt_reltoken(&nmp->nm_token);
984263bc 1218
52e1cf57 1219 if ((nmp->nm_flag & NFSMNT_KERB) == 0) {
3b568787 1220 nfs_free_mount(nmp);
52e1cf57 1221 }
984263bc
MD
1222 return (0);
1223}
1224
3b568787
MD
1225void
1226nfs_free_mount(struct nfsmount *nmp)
1227{
1228 if (nmp->nm_cred) {
1229 crfree(nmp->nm_cred);
1230 nmp->nm_cred = NULL;
1231 }
13ddc895
MD
1232 if (nmp->nm_nam) {
1233 FREE(nmp->nm_nam, M_SONAME);
1234 nmp->nm_nam = NULL;
1235 }
3b568787
MD
1236 zfree(nfsmount_zone, nmp);
1237}
1238
984263bc
MD
1239/*
1240 * Return root of a filesystem
1241 */
1242static int
3fcb1ab8 1243nfs_root(struct mount *mp, struct vnode **vpp)
984263bc 1244{
40393ded 1245 struct vnode *vp;
984263bc 1246 struct nfsmount *nmp;
eefb74c1 1247 struct vattr attrs;
984263bc
MD
1248 struct nfsnode *np;
1249 int error;
1250
1251 nmp = VFSTONFS(mp);
c6b43e93 1252 lwkt_gettoken(&nmp->nm_token);
984263bc 1253 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
c6b43e93
MD
1254 if (error) {
1255 lwkt_reltoken(&nmp->nm_token);
984263bc 1256 return (error);
c6b43e93 1257 }
984263bc 1258 vp = NFSTOV(np);
eefb74c1
MD
1259
1260 /*
1261 * Get transfer parameters and root vnode attributes
b672fc16
MD
1262 *
1263 * NOTE: nfs_fsinfo() is expected to override the default
1264 * f_iosize we set.
eefb74c1
MD
1265 */
1266 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
1267 if (nmp->nm_flag & NFSMNT_NFSV3) {
eefb74c1 1268 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype);
b672fc16 1269 error = nfs_fsinfo(nmp, vp, curthread);
eefb74c1 1270 } else {
87de5057 1271 if ((error = VOP_GETATTR(vp, &attrs)) == 0)
eefb74c1 1272 nmp->nm_state |= NFSSTA_GOTFSINFO;
2ef35c61 1273
eefb74c1 1274 }
14aa2dd7
MD
1275 } else {
1276 /*
1277 * The root vnode is usually cached by the namecache so do not
1278 * try to avoid going over the wire even if we have previous
1279 * information cached. A stale NFS mount can loop
1280 * forever resolving the root vnode if we return no-error when
1281 * there is in fact an error.
1282 */
1283 np->n_attrstamp = 0;
1284 error = VOP_GETATTR(vp, &attrs);
eefb74c1 1285 }
984263bc 1286 if (vp->v_type == VNON)
1c843a13 1287 nfs_setvtype(vp, VDIR);
2247fe02 1288 vsetflags(vp, VROOT);
14aa2dd7
MD
1289 if (error)
1290 vput(vp);
1291 else
1292 *vpp = vp;
c6b43e93 1293 lwkt_reltoken(&nmp->nm_token);
14aa2dd7 1294 return (error);
984263bc
MD
1295}
1296
b2eb81cd
MD
1297struct scaninfo {
1298 int rescan;
b2eb81cd
MD
1299 int waitfor;
1300 int allerror;
1301};
1302
1303static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
5fd012e0 1304static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
b2eb81cd 1305
984263bc
MD
1306/*
1307 * Flush out the buffer cache
1308 */
1309/* ARGSUSED */
1310static int
87de5057 1311nfs_sync(struct mount *mp, int waitfor)
984263bc 1312{
c6b43e93 1313 struct nfsmount *nmp = VFSTONFS(mp);
b2eb81cd
MD
1314 struct scaninfo scaninfo;
1315 int error;
1316
a482a28a 1317 scaninfo.rescan = 1;
b2eb81cd
MD
1318 scaninfo.waitfor = waitfor;
1319 scaninfo.allerror = 0;
984263bc
MD
1320
1321 /*
1322 * Force stale buffer cache information to be flushed.
1323 */
c6b43e93 1324 lwkt_gettoken(&nmp->nm_token);
b2eb81cd
MD
1325 error = 0;
1326 while (error == 0 && scaninfo.rescan) {
1327 scaninfo.rescan = 0;
5fd012e0 1328 error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1,
b2eb81cd 1329 nfs_sync_scan2, &scaninfo);
984263bc 1330 }
c6b43e93 1331 lwkt_reltoken(&nmp->nm_token);
b2eb81cd
MD
1332 return(error);
1333}
1334
3fcb1ab8 1335static int
b2eb81cd
MD
1336nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
1337{
1338 struct scaninfo *info = data;
1339
a11aaa81 1340 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree))
b2eb81cd
MD
1341 return(-1);
1342 if (info->waitfor == MNT_LAZY)
1343 return(-1);
1344 return(0);
1345}
1346
3fcb1ab8 1347static int
5fd012e0 1348nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
b2eb81cd
MD
1349{
1350 struct scaninfo *info = data;
1351 int error;
1352
52174f71 1353 error = VOP_FSYNC(vp, info->waitfor, 0);
b2eb81cd
MD
1354 if (error)
1355 info->allerror = error;
b2eb81cd 1356 return(0);
984263bc
MD
1357}
1358