1 /*
2 * Copyright (c) 2000-2001, Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: releng/5.0/sys/fs/smbfs/smbfs_vfsops.c 103936 2002-09-25 02:32:42Z jeff $
33 */
34 #include "opt_netsmb.h"
35 #ifndef NETSMB
36 #error "SMBFS requires option NETSMB"
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/proc.h>
42 #include <sys/bio.h>
43 #include <sys/buf.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
46 #include <sys/vnode.h>
47 #include <sys/mount.h>
48 #include <sys/stat.h>
49 #include <sys/malloc.h>
50 #include <sys/module.h>
51
52
53 #include <netsmb/smb.h>
54 #include <netsmb/smb_conn.h>
55 #include <netsmb/smb_subr.h>
56 #include <netsmb/smb_dev.h>
57
58 #include <fs/smbfs/smbfs.h>
59 #include <fs/smbfs/smbfs_node.h>
60 #include <fs/smbfs/smbfs_subr.h>
61
62 int smbfs_debuglevel = 0;
63
64 static int smbfs_version = SMBFS_VERSION;
65
66 #ifdef SMBFS_USEZONE
67 #include <vm/vm.h>
68 #include <vm/vm_extern.h>
69
70 vm_zone_t smbfsmount_zone;
71 #endif
72
73 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem");
74 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
75 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
76
77 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
78
79
80 static int smbfs_mount(struct mount *, char *, caddr_t,
81 struct nameidata *, struct thread *);
82 static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *);
83 static int smbfs_root(struct mount *, struct vnode **);
84 static int smbfs_start(struct mount *, int, struct thread *);
85 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *);
86 static int smbfs_sync(struct mount *, int, struct ucred *, struct thread *);
87 static int smbfs_unmount(struct mount *, int, struct thread *);
88 static int smbfs_init(struct vfsconf *vfsp);
89 static int smbfs_uninit(struct vfsconf *vfsp);
90
91 static struct vfsops smbfs_vfsops = {
92 smbfs_mount,
93 smbfs_start,
94 smbfs_unmount,
95 smbfs_root,
96 smbfs_quotactl,
97 smbfs_statfs,
98 smbfs_sync,
99 vfs_stdvget,
100 vfs_stdfhtovp, /* shouldn't happen */
101 vfs_stdcheckexp,
102 vfs_stdvptofh, /* shouldn't happen */
103 smbfs_init,
104 smbfs_uninit,
105 vfs_stdextattrctl
106 };
107
108
109 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
110
111 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
112 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1);
113 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
114
115 int smbfs_pbuf_freecnt = -1; /* start out unlimited */
116
117 static int
118 smbfs_mount(struct mount *mp, char *path, caddr_t data,
119 struct nameidata *ndp, struct thread *td)
120 {
121 struct smbfs_args args; /* will hold data from mount request */
122 struct smbmount *smp = NULL;
123 struct smb_vc *vcp;
124 struct smb_share *ssp = NULL;
125 struct vnode *vp;
126 struct smb_cred scred;
127 #ifndef FB_CURRENT
128 size_t size;
129 #endif
130 int error;
131 char *pc, *pe;
132
133 if (data == NULL) {
134 printf("missing data argument\n");
135 return EINVAL;
136 }
137 if (mp->mnt_flag & MNT_UPDATE) {
138 printf("MNT_UPDATE not implemented");
139 return EOPNOTSUPP;
140 }
141 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args));
142 if (error)
143 return error;
144 if (args.version != SMBFS_VERSION) {
145 printf("mount version mismatch: kernel=%d, mount=%d\n",
146 SMBFS_VERSION, args.version);
147 return EINVAL;
148 }
149 smb_makescred(&scred, td, td->td_ucred);
150 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp);
151 if (error) {
152 printf("invalid device handle %d (%d)\n", args.dev, error);
153 return error;
154 }
155 vcp = SSTOVC(ssp);
156 smb_share_unlock(ssp, 0, td);
157 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
158
159 #ifdef SMBFS_USEZONE
160 smp = zalloc(smbfsmount_zone);
161 #else
162 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE);
163 #endif
164 if (smp == NULL) {
165 printf("could not alloc smbmount\n");
166 error = ENOMEM;
167 goto bad;
168 }
169 bzero(smp, sizeof(*smp));
170 mp->mnt_data = (qaddr_t)smp;
171 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
172 if (smp->sm_hash == NULL)
173 goto bad;
174 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0);
175 smp->sm_share = ssp;
176 smp->sm_root = NULL;
177 smp->sm_args = args;
178 smp->sm_caseopt = args.caseopt;
179 smp->sm_args.file_mode = (smp->sm_args.file_mode &
180 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
181 smp->sm_args.dir_mode = (smp->sm_args.dir_mode &
182 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
183
184 /* simple_lock_init(&smp->sm_npslock);*/
185 #ifndef FB_CURRENT
186 error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
187 if (error)
188 goto bad;
189 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
190 #endif
191 pc = mp->mnt_stat.f_mntfromname;
192 pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
193 bzero(pc, MNAMELEN);
194 *pc++ = '/';
195 *pc++ = '/';
196 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
197 if (pc < pe-1) {
198 *(pc++) = '@';
199 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
200 if (pc < pe - 1) {
201 *(pc++) = '/';
202 strncpy(pc, ssp->ss_name, pe - pc - 2);
203 }
204 }
205 /* protect against invalid mount points */
206 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0';
207 vfs_getnewfsid(mp);
208 error = smbfs_root(mp, &vp);
209 if (error)
210 goto bad;
211 VOP_UNLOCK(vp, 0, td);
212 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
213
214 #ifdef DIAGNOSTICS
215 SMBERROR("mp=%p\n", mp);
216 #endif
217 return error;
218 bad:
219 if (smp) {
220 if (smp->sm_hash)
221 free(smp->sm_hash, M_SMBFSHASH);
222 lockdestroy(&smp->sm_hashlock);
223 #ifdef SMBFS_USEZONE
224 zfree(smbfsmount_zone, smp);
225 #else
226 free(smp, M_SMBFSDATA);
227 #endif
228 }
229 if (ssp)
230 smb_share_put(ssp, &scred);
231 return error;
232 }
233
234 /* Unmount the filesystem described by mp. */
235 static int
236 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td)
237 {
238 struct smbmount *smp = VFSTOSMBFS(mp);
239 struct smb_cred scred;
240 int error, flags;
241
242 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
243 flags = 0;
244 if (mntflags & MNT_FORCE)
245 flags |= FORCECLOSE;
246 /* There is 1 extra root vnode reference from smbfs_mount(). */
247 error = vflush(mp, 1, flags);
248 if (error)
249 return error;
250 smb_makescred(&scred, td, td->td_ucred);
251 smb_share_put(smp->sm_share, &scred);
252 mp->mnt_data = (qaddr_t)0;
253
254 if (smp->sm_hash)
255 free(smp->sm_hash, M_SMBFSHASH);
256 lockdestroy(&smp->sm_hashlock);
257 #ifdef SMBFS_USEZONE
258 zfree(smbfsmount_zone, smp);
259 #else
260 free(smp, M_SMBFSDATA);
261 #endif
262 mp->mnt_flag &= ~MNT_LOCAL;
263 return error;
264 }
265
266 /*
267 * Return locked root vnode of a filesystem
268 */
269 static int
270 smbfs_root(struct mount *mp, struct vnode **vpp)
271 {
272 struct smbmount *smp = VFSTOSMBFS(mp);
273 struct vnode *vp;
274 struct smbnode *np;
275 struct smbfattr fattr;
276 struct thread *td = curthread;
277 struct ucred *cred = td->td_ucred;
278 struct smb_cred scred;
279 int error;
280
281 if (smp == NULL) {
282 SMBERROR("smp == NULL (bug in umount)\n");
283 return EINVAL;
284 }
285 if (smp->sm_root) {
286 *vpp = SMBTOV(smp->sm_root);
287 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td);
288 }
289 smb_makescred(&scred, td, cred);
290 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
291 if (error)
292 return error;
293 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
294 if (error)
295 return error;
296 ASSERT_VOP_LOCKED(vp, "smbfs_root");
297 vp->v_vflag |= VV_ROOT;
298 np = VTOSMB(vp);
299 smp->sm_root = np;
300 *vpp = vp;
301 return 0;
302 }
303
304 /*
305 * Vfs start routine, a no-op.
306 */
307 /* ARGSUSED */
308 static int
309 smbfs_start(mp, flags, td)
310 struct mount *mp;
311 int flags;
312 struct thread *td;
313 {
314 SMBVDEBUG("flags=%04x\n", flags);
315 return 0;
316 }
317
318 /*
319 * Do operations associated with quotas, not supported
320 */
321 /* ARGSUSED */
322 static int
323 smbfs_quotactl(mp, cmd, uid, arg, td)
324 struct mount *mp;
325 int cmd;
326 uid_t uid;
327 caddr_t arg;
328 struct thread *td;
329 {
330 SMBVDEBUG("return EOPNOTSUPP\n");
331 return EOPNOTSUPP;
332 }
333
334 /*ARGSUSED*/
335 int
336 smbfs_init(struct vfsconf *vfsp)
337 {
338 #ifndef SMP
339 int name[2];
340 int olen, ncpu, plen, error;
341
342 name[0] = CTL_HW;
343 name[1] = HW_NCPU;
344 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen);
345 if (error == 0 && ncpu > 1)
346 printf("warning: smbfs module compiled without SMP support.");
347 #endif
348
349 #ifdef SMBFS_USEZONE
350 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
351 #endif
352 smbfs_pbuf_freecnt = nswbuf / 2 + 1;
353 SMBVDEBUG("done.\n");
354 return 0;
355 }
356
357 /*ARGSUSED*/
358 int
359 smbfs_uninit(struct vfsconf *vfsp)
360 {
361
362 SMBVDEBUG("done.\n");
363 return 0;
364 }
365
366 /*
367 * smbfs_statfs call
368 */
369 int
370 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
371 {
372 struct smbmount *smp = VFSTOSMBFS(mp);
373 struct smbnode *np = smp->sm_root;
374 struct smb_share *ssp = smp->sm_share;
375 struct smb_cred scred;
376 int error = 0;
377
378 if (np == NULL)
379 return EINVAL;
380
381 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
382 sbp->f_spare2 = 0; /* placeholder */
383 smb_makescred(&scred, td, td->td_ucred);
384
385 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0)
386 error = smbfs_smb_statfs2(ssp, sbp, &scred);
387 else
388 error = smbfs_smb_statfs(ssp, sbp, &scred);
389 if (error)
390 return error;
391 sbp->f_flags = 0; /* copy of mount exported flags */
392 if (sbp != &mp->mnt_stat) {
393 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */
394 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
395 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */
396 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
397 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
398 }
399 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
400 return 0;
401 }
402
403 /*
404 * Flush out the buffer cache
405 */
406 /* ARGSUSED */
407 static int
408 smbfs_sync(mp, waitfor, cred, td)
409 struct mount *mp;
410 int waitfor;
411 struct ucred *cred;
412 struct thread *td;
413 {
414 struct vnode *vp;
415 int error, allerror = 0;
416 /*
417 * Force stale buffer cache information to be flushed.
418 */
419 loop:
420 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist);
421 vp != NULL;
422 vp = TAILQ_NEXT(vp, v_nmntvnodes)) {
423 /*
424 * If the vnode that we are about to sync is no longer
425 * associated with this mount point, start over.
426 */
427 if (vp->v_mount != mp)
428 goto loop;
429 VI_LOCK(vp);
430 #ifndef FB_RELENG3
431 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
432 #else
433 if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
434 #endif
435 waitfor == MNT_LAZY) {
436 VI_UNLOCK(vp);
437 continue;
438 }
439 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td))
440 goto loop;
441 error = VOP_FSYNC(vp, cred, waitfor, td);
442 if (error)
443 allerror = error;
444 vput(vp);
445 }
446 return (allerror);
447 }
448
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