kernel - All lwkt thread now start out mpsafe part 1/2
[dragonfly.git] / sys / vfs / nfs / nfs_vfsops.c
CommitLineData
984263bc
MD
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 $
984263bc
MD
39 */
40
41#include "opt_bootp.h"
0e8ff41a 42#include "opt_nfsroot.h"
984263bc
MD
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>
984263bc
MD
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
1f2de5d4
MD
69#include "rpcv2.h"
70#include "nfsproto.h"
71#include "nfs.h"
1f2de5d4 72#include "nfsmount.h"
c1cf1e59 73#include "nfsnode.h"
1f2de5d4
MD
74#include "xdr_subs.h"
75#include "nfsm_subs.h"
76#include "nfsdiskless.h"
0e8ff41a 77#include "nfsmountrpc.h"
984263bc 78
c8a30e1e
JS
79extern int nfs_mountroot(struct mount *mp);
80extern void bootpc_init(void);
984263bc 81
66a1ddf5
MD
82extern struct vop_ops nfsv2_vnode_vops;
83extern struct vop_ops nfsv2_fifo_vops;
84extern struct vop_ops nfsv2_spec_vops;
984263bc
MD
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");
984263bc
MD
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
eefb74c1
MD
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
a6ee311a
RG
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,
acde96db
MD
121 struct ucred *cred);
122static int nfs_unmount ( struct mount *mp, int mntflags);
a6ee311a
RG
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);
2ef35c61
AH
126static int nfs_statvfs(struct mount *mp, struct statvfs *sbp,
127 struct ucred *cred);
87de5057 128static int nfs_sync ( struct mount *mp, int waitfor);
984263bc
MD
129
130/*
131 * nfs vfs operations.
132 */
133static struct vfsops nfs_vfsops = {
43c45e8f
HP
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,
43c45e8f
HP
139 .vfs_sync = nfs_sync,
140 .vfs_init = nfs_init,
141 .vfs_uninit = nfs_uninit
984263bc
MD
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,
984263bc
MD
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,
984263bc
MD
169 "%Ssockaddr_in","");
170
171
a6ee311a
RG
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 **,
a6ee311a
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
eefb74c1
MD
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)
984263bc
MD
191{
192 int iosize;
eefb74c1 193 int iomax;
984263bc 194
eefb74c1
MD
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;
8d429613
MD
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;
984263bc
MD
221 return iosize;
222}
223
224static void
3fcb1ab8 225nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
984263bc
MD
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;
984263bc
MD
242 args->deadthresh = oargs->deadthresh;
243 args->hostname = oargs->hostname;
244}
245
246static void
3fcb1ab8 247nfs_convert_diskless(void)
984263bc 248{
0e8ff41a
MD
249 int i;
250
984263bc
MD
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);
0e8ff41a
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
984263bc
MD
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);
0e8ff41a
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
984263bc
MD
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;
984263bc
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
MD
309
310#ifndef nolint
60233e58 311 sfp = NULL;
984263bc
MD
312#endif
313 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
314 if (error)
315 return (error);
316 vp = NFSTOV(np);
acde96db 317 /* ignore the passed cred */
984263bc
MD
318 cred = crget();
319 cred->cr_ngroups = 1;
42edf14f 320 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
3b568787 321 (void)nfs_fsinfo(nmp, vp, td);
984263bc 322 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
42edf14f
MD
323 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
324 ERROROUT(nfsm_fhtom(&info, vp));
325 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
326 if (info.v3) {
327 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
328 NFS_LATTR_NOSHRINK));
329 }
984263bc 330 if (error) {
42edf14f
MD
331 if (info.mrep != NULL)
332 m_freem(info.mrep);
984263bc
MD
333 goto nfsmout;
334 }
42edf14f 335 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
984263bc 336 sbp->f_flags = nmp->nm_flag;
eefb74c1 337
42edf14f 338 if (info.v3) {
984263bc
MD
339 sbp->f_bsize = NFS_FABLKSIZE;
340 tquad = fxdr_hyper(&sfp->sf_tbytes);
341 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
342 tquad = fxdr_hyper(&sfp->sf_fbytes);
343 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
344 tquad = fxdr_hyper(&sfp->sf_abytes);
345 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
346 sbp->f_files = (fxdr_unsigned(int32_t,
347 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
348 sbp->f_ffree = (fxdr_unsigned(int32_t,
349 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
350 } else {
351 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
352 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
353 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
354 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
355 sbp->f_files = 0;
356 sbp->f_ffree = 0;
357 }
b672fc16
MD
358
359 /*
360 * Some values are pre-set in mnt_stat. Note in particular f_iosize
361 * cannot be changed once the filesystem is mounted as it is used
362 * as the basis for BIOs.
363 */
984263bc
MD
364 if (sbp != &mp->mnt_stat) {
365 sbp->f_type = mp->mnt_vfc->vfc_typenum;
984263bc 366 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
b672fc16 367 sbp->f_iosize = mp->mnt_stat.f_iosize;
984263bc 368 }
42edf14f
MD
369 m_freem(info.mrep);
370 info.mrep = NULL;
6b08710e 371nfsmout:
984263bc
MD
372 vput(vp);
373 crfree(cred);
374 return (error);
375}
376
2ef35c61
AH
377static int
378nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
379{
380 struct vnode *vp;
381 struct nfs_statfs *sfp;
382 struct nfsmount *nmp = VFSTONFS(mp);
383 thread_t td = curthread;
384 int error = 0, retattr;
385 struct nfsnode *np;
386 struct nfsm_info info;
387
388 info.mrep = NULL;
389 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
390
391#ifndef nolint
392 sfp = NULL;
393#endif
394 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
395 if (error)
396 return (error);
397 vp = NFSTOV(np);
398 /* ignore the passed cred */
399 cred = crget();
400 cred->cr_ngroups = 1;
401 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
402 (void)nfs_fsinfo(nmp, vp, td);
403 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
404 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
405 ERROROUT(nfsm_fhtom(&info, vp));
406 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
407 if (info.v3) {
408 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
409 NFS_LATTR_NOSHRINK));
410 }
411 if (error) {
412 if (info.mrep != NULL)
413 m_freem(info.mrep);
414 goto nfsmout;
415 }
416 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
417 sbp->f_flag = nmp->nm_flag;
418 sbp->f_owner = nmp->nm_cred->cr_ruid;
419
420 if (info.v3) {
421 sbp->f_bsize = NFS_FABLKSIZE;
422 sbp->f_frsize = NFS_FABLKSIZE;
423 sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) /
424 ((u_quad_t)NFS_FABLKSIZE));
425 sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) /
426 ((u_quad_t)NFS_FABLKSIZE));
427 sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) /
428 ((u_quad_t)NFS_FABLKSIZE));
429 sbp->f_files = fxdr_hyper(&sfp->sf_tfiles);
430 sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles);
431 sbp->f_favail = fxdr_hyper(&sfp->sf_afiles);
432 } else {
433 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
434 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
435 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
436 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
437 sbp->f_files = 0;
438 sbp->f_ffree = 0;
439 sbp->f_favail = 0;
440 }
441 sbp->f_syncreads = 0;
442 sbp->f_syncwrites = 0;
443 sbp->f_asyncreads = 0;
444 sbp->f_asyncwrites = 0;
445 sbp->f_type = mp->mnt_vfc->vfc_typenum;
446
447 m_freem(info.mrep);
448 info.mrep = NULL;
449nfsmout:
450 vput(vp);
451 crfree(cred);
452 return (error);
453}
454
984263bc
MD
455/*
456 * nfs version 3 fsinfo rpc call
457 */
458int
3b568787 459nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
984263bc 460{
40393ded 461 struct nfsv3_fsinfo *fsp;
42edf14f 462 u_int32_t pref, max;
984263bc 463 int error = 0, retattr;
984263bc 464 u_int64_t maxfsize;
42edf14f 465 struct nfsm_info info;
984263bc 466
42edf14f 467 info.v3 = 1;
984263bc 468 nfsstats.rpccnt[NFSPROC_FSINFO]++;
42edf14f
MD
469 nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1));
470 ERROROUT(nfsm_fhtom(&info, vp));
471 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td,
472 nfs_vpcred(vp, ND_READ), &error));
473 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK));
474 if (error == 0) {
475 NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO));
984263bc
MD
476 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
477 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
478 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
479 ~(NFS_FABLKSIZE - 1);
480 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
481 if (max < nmp->nm_wsize && max > 0) {
482 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
483 if (nmp->nm_wsize == 0)
484 nmp->nm_wsize = max;
485 }
486 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
487 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
488 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
489 ~(NFS_FABLKSIZE - 1);
490 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
491 if (max < nmp->nm_rsize && max > 0) {
492 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
493 if (nmp->nm_rsize == 0)
494 nmp->nm_rsize = max;
495 }
496 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
497 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
498 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
499 ~(NFS_DIRBLKSIZ - 1);
500 if (max < nmp->nm_readdirsize && max > 0) {
501 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
502 if (nmp->nm_readdirsize == 0)
503 nmp->nm_readdirsize = max;
504 }
505 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
506 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
507 nmp->nm_maxfilesize = maxfsize;
508 nmp->nm_state |= NFSSTA_GOTFSINFO;
b672fc16
MD
509
510 /*
511 * Use the smaller of rsize/wsize for the biosize.
512 */
513 if (nmp->nm_rsize < nmp->nm_wsize)
514 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize;
515 else
516 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize;
984263bc 517 }
42edf14f
MD
518 m_freem(info.mrep);
519 info.mrep = NULL;
6b08710e 520nfsmout:
984263bc
MD
521 return (error);
522}
523
524/*
525 * Mount a remote root fs via. nfs. This depends on the info in the
526 * nfs_diskless structure that has been filled in properly by some primary
527 * bootstrap.
528 * It goes something like this:
529 * - do enough of "ifconfig" by calling ifioctl() so that the system
530 * can talk to the server
531 * - If nfs_diskless.mygateway is filled in, use that address as
532 * a default gateway.
533 * - build the rootfs mount point and call mountnfs() to do the rest.
534 */
535int
acde96db 536nfs_mountroot(struct mount *mp)
984263bc
MD
537{
538 struct mount *swap_mp;
539 struct nfsv3_diskless *nd = &nfsv3_diskless;
540 struct socket *so;
541 struct vnode *vp;
dadab5e9 542 struct thread *td = curthread; /* XXX */
984263bc
MD
543 int error, i;
544 u_long l;
545 char buf[128];
546
547#if defined(BOOTP_NFSROOT) && defined(BOOTP)
548 bootpc_init(); /* use bootp to get nfs_diskless filled in */
549#endif
550
551 /*
552 * XXX time must be non-zero when we init the interface or else
553 * the arp code will wedge...
554 */
3a6f9faf
MD
555 while (mycpu->gd_time_seconds == 0)
556 tsleep(mycpu, 0, "arpkludge", 10);
984263bc 557
a2103e90
MD
558 /*
559 * The boot code may have passed us a diskless structure.
560 */
2ef35c61 561 if (nfs_diskless_valid == 1)
0b9984b8
MD
562 nfs_convert_diskless();
563
a2103e90 564#define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr))
086c1d7e 565 kprintf("nfs_mountroot: interface %s ip %s",
2ef35c61 566 nd->myif.ifra_name,
a2103e90 567 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr));
2ef35c61 568 kprintf(" bcast %s",
a2103e90 569 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr));
2ef35c61 570 kprintf(" mask %s\n",
a2103e90
MD
571 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr));
572#undef SINP
984263bc
MD
573
574 /*
575 * XXX splnet, so networks will receive...
576 */
165dba55 577 crit_enter();
984263bc 578
984263bc 579 /*
a2103e90 580 * BOOTP does not necessarily have to be compiled into the kernel
2ef35c61 581 * for an NFS root to work. If we inherited the network
a2103e90
MD
582 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured
583 * out our interface for us and all we need to do is ifconfig the
584 * interface. We only do this if the interface has not already been
585 * ifconfig'd by e.g. BOOTP.
984263bc 586 */
dadab5e9 587 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
a2103e90 588 if (error) {
984263bc
MD
589 panic("nfs_mountroot: socreate(%04x): %d",
590 nd->myif.ifra_addr.sa_family, error);
984263bc 591 }
a2103e90 592
87de5057 593 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred);
984263bc
MD
594 if (error)
595 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
a2103e90 596
9ba76b73 597 soclose(so, FNONBLOCK);
984263bc
MD
598
599 /*
600 * If the gateway field is filled in, set it as the default route.
601 */
602 if (nd->mygateway.sin_len != 0) {
603 struct sockaddr_in mask, sin;
604
605 bzero((caddr_t)&mask, sizeof(mask));
606 sin = mask;
607 sin.sin_family = AF_INET;
608 sin.sin_len = sizeof(sin);
086c1d7e 609 kprintf("nfs_mountroot: gateway %s\n",
0b9984b8 610 inet_ntoa(nd->mygateway.sin_addr));
ecdefdda
MD
611 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin,
612 (struct sockaddr *)&nd->mygateway,
613 (struct sockaddr *)&mask,
614 RTF_UP | RTF_GATEWAY);
984263bc 615 if (error)
086c1d7e 616 kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error);
984263bc
MD
617 }
618
619 /*
620 * Create the rootfs mount point.
621 */
622 nd->root_args.fh = nd->root_fh;
623 nd->root_args.fhsize = nd->root_fhsize;
624 l = ntohl(nd->root_saddr.sin_addr.s_addr);
f8c7a42d 625 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
984263bc
MD
626 (l >> 24) & 0xff, (l >> 16) & 0xff,
627 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
5dacbb2e 628 kprintf("NFS_ROOT: %s\n",buf);
984263bc 629 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY,
dadab5e9 630 &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) {
5dacbb2e 631 mp->mnt_vfc->vfc_refcount--;
0b9984b8 632 crit_exit();
984263bc
MD
633 return (error);
634 }
635
636 swap_mp = NULL;
637 if (nd->swap_nblks) {
638
639 /* Convert to DEV_BSIZE instead of Kilobyte */
640 nd->swap_nblks *= 2;
641
642 /*
643 * Create a fake mount point just for the swap vnode so that the
644 * swap file can be on a different server from the rootfs.
645 */
646 nd->swap_args.fh = nd->swap_fh;
647 nd->swap_args.fhsize = nd->swap_fhsize;
648 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
f8c7a42d 649 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
984263bc
MD
650 (l >> 24) & 0xff, (l >> 16) & 0xff,
651 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
086c1d7e 652 kprintf("NFS SWAP: %s\n",buf);
984263bc 653 if ((error = nfs_mountdiskless(buf, "/swap", 0,
0b9984b8
MD
654 &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0) {
655 crit_exit();
984263bc 656 return (error);
0b9984b8 657 }
f9642f56 658 vfs_unbusy(swap_mp);
984263bc 659
2ef35c61 660 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
984263bc 661 nd->swap_nblks * DEV_BSIZE ;
2ef35c61 662
984263bc
MD
663 /*
664 * Since the swap file is not the root dir of a file system,
665 * hack it to a regular file.
666 */
2247fe02 667 vclrflags(vp, VROOT);
597aea93 668 vref(vp);
1c843a13 669 nfs_setvtype(vp, VREG);
e4c9c0c8 670 swaponvp(td, vp, nd->swap_nblks);
984263bc
MD
671 }
672
673 mp->mnt_flag |= MNT_ROOTFS;
f9642f56 674 vfs_unbusy(mp);
984263bc
MD
675
676 /*
677 * This is not really an nfs issue, but it is much easier to
678 * set hostname here and then let the "/etc/rc.xxx" files
679 * mount the right /var based upon its preset value.
680 */
681 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
682 hostname[MAXHOSTNAMELEN - 1] = '\0';
683 for (i = 0; i < MAXHOSTNAMELEN; i++)
684 if (hostname[i] == '\0')
685 break;
686 inittodr(ntohl(nd->root_time));
0b9984b8 687 crit_exit();
984263bc
MD
688 return (0);
689}
690
691/*
692 * Internal version of mount system call for diskless setup.
693 */
694static int
dadab5e9
MD
695nfs_mountdiskless(char *path, char *which, int mountflag,
696 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
697 struct vnode **vpp, struct mount **mpp)
984263bc
MD
698{
699 struct mount *mp;
700 struct sockaddr *nam;
984263bc 701 int didalloc = 0;
0e8ff41a 702 int error;
984263bc
MD
703
704 mp = *mpp;
705
706 if (mp == NULL) {
707 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
086c1d7e 708 kprintf("nfs_mountroot: NFS not configured");
984263bc
MD
709 return (error);
710 }
711 didalloc = 1;
712 }
984263bc
MD
713 mp->mnt_kern_flag = 0;
714 mp->mnt_flag = mountflag;
cfa2ba21 715 nam = dup_sockaddr((struct sockaddr *)sin);
0e8ff41a
MD
716
717#if defined(BOOTP) || defined(NFS_ROOT)
718 if (args->fhsize == 0) {
df0a038e
SW
719 char *xpath = path;
720
086c1d7e 721 kprintf("NFS_ROOT: No FH passed from loader, attempting mount rpc...");
5dacbb2e
MD
722 while (*xpath && *xpath != ':')
723 ++xpath;
724 if (*xpath)
725 ++xpath;
0e8ff41a 726 args->fhsize = 0;
5dacbb2e 727 error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td);
0e8ff41a 728 if (error) {
5dacbb2e 729 kprintf("failed error %d.\n", error);
0e8ff41a
MD
730 goto haderror;
731 }
086c1d7e 732 kprintf("success!\n");
0e8ff41a
MD
733 }
734#endif
735
984263bc 736 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
04ef15fb 737#if defined(BOOTP) || defined(NFS_ROOT)
0e8ff41a 738haderror:
04ef15fb 739#endif
086c1d7e 740 kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error);
984263bc 741 mp->mnt_vfc->vfc_refcount--;
f9642f56 742 vfs_unbusy(mp);
984263bc 743 if (didalloc)
efda3bd0 744 kfree(mp, M_MOUNT);
984263bc
MD
745 FREE(nam, M_SONAME);
746 return (error);
747 }
984263bc
MD
748 *mpp = mp;
749 return (0);
750}
751
752static void
3fcb1ab8 753nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
984263bc 754{
984263bc
MD
755 int adjsock;
756 int maxio;
757
165dba55 758 crit_enter();
984263bc
MD
759 /*
760 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
761 * no sense in that context.
762 */
e20dbf61 763 if (nmp->nm_sotype == SOCK_STREAM)
984263bc
MD
764 nmp->nm_flag &= ~NFSMNT_NOCONN;
765
766 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
767 if ((argp->flags & NFSMNT_NFSV3) == 0)
768 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
769
e20dbf61
MD
770 /*
771 * Re-bind if rsrvd port flag has changed
772 */
773 adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) !=
774 (argp->flags & NFSMNT_RESVPORT);
984263bc
MD
775
776 /* Update flags atomically. Don't change the lock bits. */
777 nmp->nm_flag = argp->flags | nmp->nm_flag;
165dba55 778 crit_exit();
984263bc
MD
779
780 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
781 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
782 if (nmp->nm_timeo < NFS_MINTIMEO)
783 nmp->nm_timeo = NFS_MINTIMEO;
784 else if (nmp->nm_timeo > NFS_MAXTIMEO)
785 nmp->nm_timeo = NFS_MAXTIMEO;
786 }
787
788 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
789 nmp->nm_retry = argp->retrans;
790 if (nmp->nm_retry > NFS_MAXREXMIT)
791 nmp->nm_retry = NFS_MAXREXMIT;
792 }
793
e20dbf61
MD
794 /*
795 * These parameters effect the buffer cache and cannot be changed
796 * once we've successfully mounted.
797 */
798 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
799 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype);
800
801 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
802 nmp->nm_wsize = argp->wsize;
803 /* Round down to multiple of blocksize */
804 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
805 if (nmp->nm_wsize <= 0)
806 nmp->nm_wsize = NFS_FABLKSIZE;
807 }
808 if (nmp->nm_wsize > maxio)
809 nmp->nm_wsize = maxio;
810 if (nmp->nm_wsize > MAXBSIZE)
811 nmp->nm_wsize = MAXBSIZE;
812
813 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
814 nmp->nm_rsize = argp->rsize;
815 /* Round down to multiple of blocksize */
816 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
817 if (nmp->nm_rsize <= 0)
818 nmp->nm_rsize = NFS_FABLKSIZE;
819 }
820 if (nmp->nm_rsize > maxio)
821 nmp->nm_rsize = maxio;
822 if (nmp->nm_rsize > MAXBSIZE)
823 nmp->nm_rsize = MAXBSIZE;
824
825 if ((argp->flags & NFSMNT_READDIRSIZE) &&
826 argp->readdirsize > 0) {
827 nmp->nm_readdirsize = argp->readdirsize;
828 }
829 if (nmp->nm_readdirsize > maxio)
830 nmp->nm_readdirsize = maxio;
831 if (nmp->nm_readdirsize > nmp->nm_rsize)
832 nmp->nm_readdirsize = nmp->nm_rsize;
984263bc 833 }
984263bc
MD
834
835 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
836 nmp->nm_acregmin = argp->acregmin;
837 else
838 nmp->nm_acregmin = NFS_MINATTRTIMO;
839 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
840 nmp->nm_acregmax = argp->acregmax;
841 else
842 nmp->nm_acregmax = NFS_MAXATTRTIMO;
843 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
844 nmp->nm_acdirmin = argp->acdirmin;
845 else
846 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
847 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
848 nmp->nm_acdirmax = argp->acdirmax;
849 else
850 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
851 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
852 nmp->nm_acdirmin = nmp->nm_acdirmax;
853 if (nmp->nm_acregmin > nmp->nm_acregmax)
854 nmp->nm_acregmin = nmp->nm_acregmax;
855
856 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
857 if (argp->maxgrouplist <= NFS_MAXGRPS)
858 nmp->nm_numgrps = argp->maxgrouplist;
859 else
860 nmp->nm_numgrps = NFS_MAXGRPS;
861 }
862 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
863 if (argp->readahead <= NFS_MAXRAHEAD)
864 nmp->nm_readahead = argp->readahead;
865 else
866 nmp->nm_readahead = NFS_MAXRAHEAD;
867 }
984263bc 868 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
e07fef60 869 if (argp->deadthresh <= NFS_NEVERDEAD)
984263bc
MD
870 nmp->nm_deadthresh = argp->deadthresh;
871 else
e07fef60 872 nmp->nm_deadthresh = NFS_NEVERDEAD;
984263bc
MD
873 }
874
984263bc
MD
875 if (nmp->nm_so && adjsock) {
876 nfs_safedisconnect(nmp);
877 if (nmp->nm_sotype == SOCK_DGRAM)
60233e58 878 while (nfs_connect(nmp, NULL)) {
086c1d7e 879 kprintf("nfs_args: retrying connect\n");
377d4740 880 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
984263bc
MD
881 }
882 }
883}
884
885/*
886 * VFS Operations.
887 *
888 * mount system call
889 * It seems a bit dumb to copyinstr() the host and path here and then
890 * bcopy() them in mountnfs(), but I wanted to detect errors before
891 * doing the sockargs() call because sockargs() allocates an mbuf and
892 * an error after that means that I have to release the mbuf.
893 */
894/* ARGSUSED */
895static int
acde96db 896nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
984263bc
MD
897{
898 int error;
899 struct nfs_args args;
900 struct sockaddr *nam;
901 struct vnode *vp;
902 char pth[MNAMELEN], hst[MNAMELEN];
903 size_t len;
904 u_char nfh[NFSX_V3FHMAX];
905
906 if (path == NULL) {
907 nfs_mountroot(mp);
908 return (0);
909 }
910 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
911 if (error)
912 return (error);
913 if (args.version != NFS_ARGSVERSION) {
914#ifdef COMPAT_PRELITE2
915 /*
916 * If the argument version is unknown, then assume the
917 * caller is a pre-lite2 4.4BSD client and convert its
918 * arguments.
919 */
920 struct onfs_args oargs;
921 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
922 if (error)
923 return (error);
924 nfs_convert_oargs(&args,&oargs);
925#else /* !COMPAT_PRELITE2 */
926 return (EPROGMISMATCH);
927#endif /* COMPAT_PRELITE2 */
928 }
929 if (mp->mnt_flag & MNT_UPDATE) {
40393ded 930 struct nfsmount *nmp = VFSTONFS(mp);
984263bc
MD
931
932 if (nmp == NULL)
933 return (EIO);
934 /*
935 * When doing an update, we can't change from or to
e20dbf61 936 * v3, or change cookie translation, or rsize or wsize.
984263bc 937 */
e20dbf61
MD
938 args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE);
939 args.flags |= nmp->nm_flag & (NFSMNT_NFSV3);
984263bc
MD
940 nfs_decode_args(nmp, &args);
941 return (0);
942 }
943
944 /*
945 * Make the nfs_ip_paranoia sysctl serve as the default connection
2ef35c61 946 * or no-connection mode for those protocols that support
984263bc
MD
947 * no-connection mode (the flag will be cleared later for protocols
948 * that do not support no-connection mode). This will allow a client
949 * to receive replies from a different IP then the request was
950 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
951 * not 0.
952 */
953 if (nfs_ip_paranoia == 0)
954 args.flags |= NFSMNT_NOCONN;
955 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
956 return (EINVAL);
957 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
958 if (error)
959 return (error);
960 error = copyinstr(path, pth, MNAMELEN-1, &len);
961 if (error)
962 return (error);
963 bzero(&pth[len], MNAMELEN - len);
964 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
965 if (error)
966 return (error);
967 bzero(&hst[len], MNAMELEN - len);
968 /* sockargs() call must be after above copyin() calls */
969 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
970 if (error)
971 return (error);
972 args.fh = nfh;
973 error = mountnfs(&args, mp, nam, pth, hst, &vp);
974 return (error);
975}
976
977/*
978 * Common code for mount and mountroot
979 */
980static int
dadab5e9
MD
981mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
982 char *pth, char *hst, struct vnode **vpp)
984263bc 983{
40393ded 984 struct nfsmount *nmp;
984263bc
MD
985 struct nfsnode *np;
986 int error;
13ddc895
MD
987 int rxcpu;
988 int txcpu;
984263bc
MD
989
990 if (mp->mnt_flag & MNT_UPDATE) {
991 nmp = VFSTONFS(mp);
992 /* update paths, file handles, etc, here XXX */
993 FREE(nam, M_SONAME);
994 return (0);
995 } else {
996 nmp = zalloc(nfsmount_zone);
997 bzero((caddr_t)nmp, sizeof (struct nfsmount));
8684e6f9
MD
998 mtx_init(&nmp->nm_rxlock);
999 mtx_init(&nmp->nm_txlock);
984263bc 1000 TAILQ_INIT(&nmp->nm_uidlruhead);
81b5c339 1001 TAILQ_INIT(&nmp->nm_bioq);
e21aec5b 1002 TAILQ_INIT(&nmp->nm_reqq);
edb90c22
MD
1003 TAILQ_INIT(&nmp->nm_reqtxq);
1004 TAILQ_INIT(&nmp->nm_reqrxq);
984263bc
MD
1005 mp->mnt_data = (qaddr_t)nmp;
1006 }
1007 vfs_getnewfsid(mp);
1008 nmp->nm_mountp = mp;
984263bc
MD
1009
1010 /*
1011 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
1012 * high, depending on whether we end up with negative offsets in
1013 * the client or server somewhere. 2GB-1 may be safer.
1014 *
1015 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
1016 * that we can handle until we find out otherwise.
1017 * XXX Our "safe" limit on the client is what we can store in our
1018 * buffer cache using signed(!) block numbers.
1019 */
1020 if ((argp->flags & NFSMNT_NFSV3) == 0)
1021 nmp->nm_maxfilesize = 0xffffffffLL;
1022 else
1023 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
1024
1025 nmp->nm_timeo = NFS_TIMEO;
1026 nmp->nm_retry = NFS_RETRANS;
eefb74c1
MD
1027 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype);
1028 nmp->nm_rsize = nmp->nm_wsize;
984263bc
MD
1029 nmp->nm_readdirsize = NFS_READDIRSIZE;
1030 nmp->nm_numgrps = NFS_MAXGRPS;
1031 nmp->nm_readahead = NFS_DEFRAHEAD;
0639df29 1032 nmp->nm_deadthresh = NFS_DEADTHRESH;
984263bc
MD
1033 nmp->nm_fhsize = argp->fhsize;
1034 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
1035 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
984263bc
MD
1036 nmp->nm_nam = nam;
1037 /* Set up the sockets and per-host congestion */
1038 nmp->nm_sotype = argp->sotype;
1039 nmp->nm_soproto = argp->proto;
3b568787 1040 nmp->nm_cred = crhold(proc0.p_ucred);
984263bc
MD
1041
1042 nfs_decode_args(nmp, argp);
1043
1044 /*
1045 * For Connection based sockets (TCP,...) defer the connect until
1046 * the first request, in case the server is not responding.
1047 */
1048 if (nmp->nm_sotype == SOCK_DGRAM &&
60233e58 1049 (error = nfs_connect(nmp, NULL)))
984263bc
MD
1050 goto bad;
1051
1052 /*
1053 * This is silly, but it has to be set so that vinifod() works.
1054 * We do not want to do an nfs_statfs() here since we can get
1055 * stuck on a dead server and we are holding a lock on the mount
1056 * point.
1057 */
2ef35c61 1058 mp->mnt_stat.f_iosize =
eefb74c1
MD
1059 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype);
1060
984263bc 1061 /*
0961aa92
MD
1062 * Install vop_ops for our vnops
1063 */
66a1ddf5
MD
1064 vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops);
1065 vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops);
1066 vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops);
0961aa92
MD
1067
1068 /*
984263bc
MD
1069 * A reference count is needed on the nfsnode representing the
1070 * remote root. If this object is not persistent, then backward
1071 * traversals of the mount point (i.e. "..") will not work if
1072 * the nfsnode gets flushed out of the cache. Ufs does not have
1073 * this problem, because one can identify root inodes by their
1074 * number == ROOTINO (2).
1075 */
1076 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1077 if (error)
1078 goto bad;
1079 *vpp = NFSTOV(np);
1080
1081 /*
eefb74c1
MD
1082 * Retrieval of mountpoint attributes is delayed until nfs_rot
1083 * or nfs_statfs are first called. This will happen either when
1084 * we first traverse the mount point or if somebody does a df(1).
1085 *
1086 * NFSSTA_GOTFSINFO is used to flag if we have successfully
1087 * retrieved mountpoint attributes. In the case of NFSv3 we
1088 * also flag static fsinfo.
984263bc 1089 */
eefb74c1
MD
1090 if (*vpp != NULL)
1091 (*vpp)->v_type = VNON;
984263bc
MD
1092
1093 /*
1094 * Lose the lock but keep the ref.
1095 */
a11aaa81 1096 vn_unlock(*vpp);
9a702b27 1097 TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry);
984263bc 1098
13ddc895
MD
1099#ifdef SMP
1100 switch(ncpus) {
1101 case 0:
f8565b0f 1102 case 1:
13ddc895
MD
1103 rxcpu = 0;
1104 txcpu = 0;
1105 break;
f8565b0f 1106 case 2:
13ddc895
MD
1107 rxcpu = 0;
1108 txcpu = 1;
1109 break;
1110 default:
1111 rxcpu = 1;
1112 txcpu = 2;
1113 break;
1114 }
1115#else
1116 rxcpu = 0;
1117 txcpu = 0;
1118#endif
1119
52e1cf57
MD
1120 /*
1121 * Start the reader and writer threads.
1122 */
1123 lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread,
c9e9fb21 1124 NULL, TDF_MPSAFE, rxcpu, "nfsiod_rx");
52e1cf57 1125 lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread,
c9e9fb21 1126 NULL, TDF_MPSAFE, txcpu, "nfsiod_tx");
52e1cf57 1127
984263bc
MD
1128 return (0);
1129bad:
1130 nfs_disconnect(nmp);
3b568787 1131 nfs_free_mount(nmp);
984263bc
MD
1132 return (error);
1133}
1134
1135/*
1136 * unmount system call
1137 */
1138static int
acde96db 1139nfs_unmount(struct mount *mp, int mntflags)
984263bc 1140{
40393ded 1141 struct nfsmount *nmp;
984263bc
MD
1142 int error, flags = 0;
1143
984263bc 1144 nmp = VFSTONFS(mp);
d9adbeaf
MD
1145 if (mntflags & MNT_FORCE) {
1146 flags |= FORCECLOSE;
1147 nmp->nm_flag |= NFSMNT_FORCE;
1148 }
1149
984263bc
MD
1150 /*
1151 * Goes something like this..
1152 * - Call vflush() to clear out vnodes for this file system
1153 * - Close the socket
1154 * - Free up the data structures
1155 */
1156 /* In the forced case, cancel any outstanding requests. */
1157 if (flags & FORCECLOSE) {
1158 error = nfs_nmcancelreqs(nmp);
d9adbeaf
MD
1159 if (error) {
1160 kprintf("NFS: %s: Unable to cancel all requests\n",
1161 mp->mnt_stat.f_mntfromname);
1162 /* continue anyway */
1163 }
984263bc 1164 }
d9adbeaf 1165
984263bc 1166 /*
e07fef60 1167 * Must handshake with nfs_clientd() if it is active. XXX
984263bc
MD
1168 */
1169 nmp->nm_state |= NFSSTA_DISMINPROG;
984263bc 1170
d9adbeaf
MD
1171 /*
1172 * We hold 1 extra ref on the root vnode; see comment in mountnfs().
1173 *
1174 * If this doesn't work and we are doing a forced unmount we continue
1175 * anyway.
1176 */
984263bc
MD
1177 error = vflush(mp, 1, flags);
1178 if (error) {
1179 nmp->nm_state &= ~NFSSTA_DISMINPROG;
d9adbeaf
MD
1180 if ((flags & FORCECLOSE) == 0)
1181 return (error);
984263bc
MD
1182 }
1183
1184 /*
1185 * We are now committed to the unmount.
1186 * For NQNFS, let the server daemon free the nfsmount structure.
1187 */
e07fef60 1188 if (nmp->nm_flag & NFSMNT_KERB)
984263bc 1189 nmp->nm_state |= NFSSTA_DISMNT;
13ddc895 1190 nfssvc_iod_stop1(nmp);
984263bc 1191 nfs_disconnect(nmp);
13ddc895 1192 nfssvc_iod_stop2(nmp);
9a702b27 1193 TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry);
984263bc 1194
52e1cf57 1195 if ((nmp->nm_flag & NFSMNT_KERB) == 0) {
3b568787 1196 nfs_free_mount(nmp);
52e1cf57 1197 }
984263bc
MD
1198 return (0);
1199}
1200
3b568787
MD
1201void
1202nfs_free_mount(struct nfsmount *nmp)
1203{
1204 if (nmp->nm_cred) {
1205 crfree(nmp->nm_cred);
1206 nmp->nm_cred = NULL;
1207 }
13ddc895
MD
1208 if (nmp->nm_nam) {
1209 FREE(nmp->nm_nam, M_SONAME);
1210 nmp->nm_nam = NULL;
1211 }
3b568787
MD
1212 zfree(nfsmount_zone, nmp);
1213}
1214
984263bc
MD
1215/*
1216 * Return root of a filesystem
1217 */
1218static int
3fcb1ab8 1219nfs_root(struct mount *mp, struct vnode **vpp)
984263bc 1220{
40393ded 1221 struct vnode *vp;
984263bc 1222 struct nfsmount *nmp;
eefb74c1 1223 struct vattr attrs;
984263bc
MD
1224 struct nfsnode *np;
1225 int error;
1226
1227 nmp = VFSTONFS(mp);
1228 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1229 if (error)
1230 return (error);
1231 vp = NFSTOV(np);
eefb74c1
MD
1232
1233 /*
1234 * Get transfer parameters and root vnode attributes
b672fc16
MD
1235 *
1236 * NOTE: nfs_fsinfo() is expected to override the default
1237 * f_iosize we set.
eefb74c1
MD
1238 */
1239 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
1240 if (nmp->nm_flag & NFSMNT_NFSV3) {
eefb74c1 1241 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype);
b672fc16 1242 error = nfs_fsinfo(nmp, vp, curthread);
eefb74c1 1243 } else {
87de5057 1244 if ((error = VOP_GETATTR(vp, &attrs)) == 0)
eefb74c1 1245 nmp->nm_state |= NFSSTA_GOTFSINFO;
2ef35c61 1246
eefb74c1 1247 }
14aa2dd7
MD
1248 } else {
1249 /*
1250 * The root vnode is usually cached by the namecache so do not
1251 * try to avoid going over the wire even if we have previous
1252 * information cached. A stale NFS mount can loop
1253 * forever resolving the root vnode if we return no-error when
1254 * there is in fact an error.
1255 */
1256 np->n_attrstamp = 0;
1257 error = VOP_GETATTR(vp, &attrs);
eefb74c1 1258 }
984263bc 1259 if (vp->v_type == VNON)
1c843a13 1260 nfs_setvtype(vp, VDIR);
2247fe02 1261 vsetflags(vp, VROOT);
14aa2dd7
MD
1262 if (error)
1263 vput(vp);
1264 else
1265 *vpp = vp;
1266 return (error);
984263bc
MD
1267}
1268
b2eb81cd
MD
1269struct scaninfo {
1270 int rescan;
b2eb81cd
MD
1271 int waitfor;
1272 int allerror;
1273};
1274
1275static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
5fd012e0 1276static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
b2eb81cd 1277
984263bc
MD
1278/*
1279 * Flush out the buffer cache
1280 */
1281/* ARGSUSED */
1282static int
87de5057 1283nfs_sync(struct mount *mp, int waitfor)
984263bc 1284{
b2eb81cd
MD
1285 struct scaninfo scaninfo;
1286 int error;
1287
a482a28a 1288 scaninfo.rescan = 1;
b2eb81cd
MD
1289 scaninfo.waitfor = waitfor;
1290 scaninfo.allerror = 0;
984263bc
MD
1291
1292 /*
1293 * Force stale buffer cache information to be flushed.
1294 */
b2eb81cd
MD
1295 error = 0;
1296 while (error == 0 && scaninfo.rescan) {
1297 scaninfo.rescan = 0;
5fd012e0 1298 error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1,
b2eb81cd 1299 nfs_sync_scan2, &scaninfo);
984263bc 1300 }
b2eb81cd
MD
1301 return(error);
1302}
1303
3fcb1ab8 1304static int
b2eb81cd
MD
1305nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
1306{
1307 struct scaninfo *info = data;
1308
a11aaa81 1309 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree))
b2eb81cd
MD
1310 return(-1);
1311 if (info->waitfor == MNT_LAZY)
1312 return(-1);
1313 return(0);
1314}
1315
3fcb1ab8 1316static int
5fd012e0 1317nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
b2eb81cd
MD
1318{
1319 struct scaninfo *info = data;
1320 int error;
1321
52174f71 1322 error = VOP_FSYNC(vp, info->waitfor, 0);
b2eb81cd
MD
1323 if (error)
1324 info->allerror = error;
b2eb81cd 1325 return(0);
984263bc
MD
1326}
1327