1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000-2001 Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/proc.h>
34 #include <sys/bio.h>
35 #include <sys/buf.h>
36 #include <sys/kernel.h>
37 #include <sys/sysctl.h>
38 #include <sys/vnode.h>
39 #include <sys/mount.h>
40 #include <sys/stat.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/sx.h>
44
45 #include <netsmb/smb.h>
46 #include <netsmb/smb_conn.h>
47 #include <netsmb/smb_subr.h>
48 #include <netsmb/smb_dev.h>
49
50 #include <fs/smbfs/smbfs.h>
51 #include <fs/smbfs/smbfs_node.h>
52 #include <fs/smbfs/smbfs_subr.h>
53
54 static int smbfs_debuglevel = 0;
55
56 static int smbfs_version = SMBFS_VERSION;
57
58 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
59 "SMB/CIFS filesystem");
60 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
61 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
62
63 static vfs_init_t smbfs_init;
64 static vfs_uninit_t smbfs_uninit;
65 static vfs_cmount_t smbfs_cmount;
66 static vfs_mount_t smbfs_mount;
67 static vfs_root_t smbfs_root;
68 static vfs_quotactl_t smbfs_quotactl;
69 static vfs_statfs_t smbfs_statfs;
70 static vfs_unmount_t smbfs_unmount;
71
72 static struct vfsops smbfs_vfsops = {
73 .vfs_init = smbfs_init,
74 .vfs_cmount = smbfs_cmount,
75 .vfs_mount = smbfs_mount,
76 .vfs_quotactl = smbfs_quotactl,
77 .vfs_root = smbfs_root,
78 .vfs_statfs = smbfs_statfs,
79 .vfs_sync = vfs_stdsync,
80 .vfs_uninit = smbfs_uninit,
81 .vfs_unmount = smbfs_unmount,
82 };
83
84 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
85
86 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
87 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
88 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
89
90 uma_zone_t smbfs_pbuf_zone;
91
92 static int
93 smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags)
94 {
95 struct smbfs_args args;
96 int error;
97
98 error = copyin(data, &args, sizeof(struct smbfs_args));
99 if (error)
100 return error;
101
102 if (args.version != SMBFS_VERSION) {
103 printf("mount version mismatch: kernel=%d, mount=%d\n",
104 SMBFS_VERSION, args.version);
105 return EINVAL;
106 }
107 ma = mount_argf(ma, "dev", "%d", args.dev);
108 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft");
109 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr");
110 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong");
111 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls");
112 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong");
113 ma = mount_arg(ma, "rootpath", args.root_path, -1);
114 ma = mount_argf(ma, "uid", "%d", args.uid);
115 ma = mount_argf(ma, "gid", "%d", args.gid);
116 ma = mount_argf(ma, "file_mode", "%d", args.file_mode);
117 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode);
118 ma = mount_argf(ma, "caseopt", "%d", args.caseopt);
119
120 error = kernel_mount(ma, flags);
121
122 return (error);
123 }
124
125 static const char *smbfs_opts[] = {
126 "fd", "soft", "intr", "strong", "have_nls", "long",
127 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode",
128 "caseopt", "errmsg", NULL
129 };
130
131 static int
132 smbfs_mount(struct mount *mp)
133 {
134 struct smbmount *smp = NULL;
135 struct smb_vc *vcp;
136 struct smb_share *ssp = NULL;
137 struct vnode *vp;
138 struct thread *td;
139 struct smb_dev *dev;
140 struct smb_cred *scred;
141 int error, v;
142 char *pc, *pe;
143
144 dev = NULL;
145 td = curthread;
146 if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
147 return EOPNOTSUPP;
148
149 if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
150 vfs_mount_error(mp, "%s", "Invalid option");
151 return (EINVAL);
152 }
153
154 scred = smbfs_malloc_scred();
155 smb_makescred(scred, td, td->td_ucred);
156
157 /* Ask userspace of `fd`, the file descriptor of this session */
158 if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) {
159 vfs_mount_error(mp, "No fd option");
160 smbfs_free_scred(scred);
161 return (EINVAL);
162 }
163 error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev);
164 smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO);
165 if (error) {
166 printf("invalid device handle %d (%d)\n", v, error);
167 vfs_mount_error(mp, "invalid device handle %d %d\n", v, error);
168 smbfs_free_scred(scred);
169 free(smp, M_SMBFSDATA);
170 return error;
171 }
172 vcp = SSTOVC(ssp);
173 smb_share_unlock(ssp);
174 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
175 mp->mnt_data = smp;
176 smp->sm_share = ssp;
177 smp->sm_root = NULL;
178 smp->sm_dev = dev;
179 if (1 != vfs_scanopt(mp->mnt_optnew,
180 "caseopt", "%d", &smp->sm_caseopt)) {
181 vfs_mount_error(mp, "Invalid caseopt");
182 error = EINVAL;
183 goto bad;
184 }
185 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
186 vfs_mount_error(mp, "Invalid uid");
187 error = EINVAL;
188 goto bad;
189 }
190 smp->sm_uid = v;
191
192 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
193 vfs_mount_error(mp, "Invalid gid");
194 error = EINVAL;
195 goto bad;
196 }
197 smp->sm_gid = v;
198
199 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
200 vfs_mount_error(mp, "Invalid file_mode");
201 error = EINVAL;
202 goto bad;
203 }
204 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
205
206 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
207 vfs_mount_error(mp, "Invalid dir_mode");
208 error = EINVAL;
209 goto bad;
210 }
211 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
212
213 vfs_flagopt(mp->mnt_optnew,
214 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);
215
216 pc = mp->mnt_stat.f_mntfromname;
217 pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
218 bzero(pc, MNAMELEN);
219 *pc++ = '/';
220 *pc++ = '/';
221 pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
222 if (pc < pe-1) {
223 *(pc++) = '@';
224 pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
225 if (pc < pe - 1) {
226 *(pc++) = '/';
227 strncpy(pc, ssp->ss_name, pe - pc - 2);
228 }
229 }
230 vfs_getnewfsid(mp);
231 error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
232 if (error) {
233 vfs_mount_error(mp, "smbfs_root error: %d", error);
234 goto bad;
235 }
236 VOP_UNLOCK(vp);
237 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
238
239 #ifdef DIAGNOSTIC
240 SMBERROR("mp=%p\n", mp);
241 #endif
242 smbfs_free_scred(scred);
243 return error;
244 bad:
245 if (ssp)
246 smb_share_put(ssp, scred);
247 smbfs_free_scred(scred);
248 SMB_LOCK();
249 if (error && smp->sm_dev == dev) {
250 smp->sm_dev = NULL;
251 sdp_trydestroy(dev);
252 }
253 SMB_UNLOCK();
254 free(smp, M_SMBFSDATA);
255 return error;
256 }
257
258 /* Unmount the filesystem described by mp. */
259 static int
260 smbfs_unmount(struct mount *mp, int mntflags)
261 {
262 struct thread *td;
263 struct smbmount *smp = VFSTOSMBFS(mp);
264 struct smb_cred *scred;
265 struct smb_dev *dev;
266 int error, flags;
267
268 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
269 td = curthread;
270 flags = 0;
271 if (mntflags & MNT_FORCE)
272 flags |= FORCECLOSE;
273 /*
274 * Keep trying to flush the vnode list for the mount while
275 * some are still busy and we are making progress towards
276 * making them not busy. This is needed because smbfs vnodes
277 * reference their parent directory but may appear after their
278 * parent in the list; one pass over the vnode list is not
279 * sufficient in this case.
280 */
281 do {
282 smp->sm_didrele = 0;
283 /* There is 1 extra root vnode reference from smbfs_mount(). */
284 error = vflush(mp, 1, flags, td);
285 } while (error == EBUSY && smp->sm_didrele != 0);
286 if (error)
287 return error;
288 scred = smbfs_malloc_scred();
289 smb_makescred(scred, td, td->td_ucred);
290 error = smb_share_lock(smp->sm_share);
291 if (error)
292 goto out;
293 smb_share_put(smp->sm_share, scred);
294 SMB_LOCK();
295 dev = smp->sm_dev;
296 if (!dev)
297 panic("No private data for mount point");
298 sdp_trydestroy(dev);
299 mp->mnt_data = NULL;
300 SMB_UNLOCK();
301 free(smp, M_SMBFSDATA);
302 MNT_ILOCK(mp);
303 mp->mnt_flag &= ~MNT_LOCAL;
304 MNT_IUNLOCK(mp);
305 out:
306 smbfs_free_scred(scred);
307 return error;
308 }
309
310 /*
311 * Return locked root vnode of a filesystem
312 */
313 static int
314 smbfs_root(struct mount *mp, int flags, struct vnode **vpp)
315 {
316 struct smbmount *smp = VFSTOSMBFS(mp);
317 struct vnode *vp;
318 struct smbnode *np;
319 struct smbfattr fattr;
320 struct thread *td;
321 struct ucred *cred;
322 struct smb_cred *scred;
323 int error;
324
325 td = curthread;
326 cred = td->td_ucred;
327
328 if (smp->sm_root) {
329 *vpp = SMBTOV(smp->sm_root);
330 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY);
331 }
332 scred = smbfs_malloc_scred();
333 smb_makescred(scred, td, cred);
334 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, scred);
335 if (error)
336 goto out;
337 error = smbfs_nget(mp, NULL, NULL, 0, &fattr, &vp);
338 if (error)
339 goto out;
340 ASSERT_VOP_LOCKED(vp, "smbfs_root");
341 vp->v_vflag |= VV_ROOT;
342 np = VTOSMB(vp);
343 smp->sm_root = np;
344 *vpp = vp;
345 out:
346 smbfs_free_scred(scred);
347 return error;
348 }
349
350 /*
351 * Do operations associated with quotas, not supported
352 */
353 /* ARGSUSED */
354 static int
355 smbfs_quotactl(mp, cmd, uid, arg)
356 struct mount *mp;
357 int cmd;
358 uid_t uid;
359 void *arg;
360 {
361 SMBVDEBUG("return EOPNOTSUPP\n");
362 return EOPNOTSUPP;
363 }
364
365 /*ARGSUSED*/
366 int
367 smbfs_init(struct vfsconf *vfsp)
368 {
369
370 smbfs_pbuf_zone = pbuf_zsecond_create("smbpbuf", nswbuf / 2);
371 SMBVDEBUG("done.\n");
372 return 0;
373 }
374
375 /*ARGSUSED*/
376 int
377 smbfs_uninit(struct vfsconf *vfsp)
378 {
379
380 uma_zdestroy(smbfs_pbuf_zone);
381 SMBVDEBUG("done.\n");
382 return 0;
383 }
384
385 /*
386 * smbfs_statfs call
387 */
388 int
389 smbfs_statfs(struct mount *mp, struct statfs *sbp)
390 {
391 struct thread *td = curthread;
392 struct smbmount *smp = VFSTOSMBFS(mp);
393 struct smbnode *np = smp->sm_root;
394 struct smb_share *ssp = smp->sm_share;
395 struct smb_cred *scred;
396 int error;
397
398 if (np == NULL) {
399 vfs_mount_error(mp, "np == NULL");
400 return EINVAL;
401 }
402
403 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
404 scred = smbfs_malloc_scred();
405 smb_makescred(scred, td, td->td_ucred);
406 error = smbfs_smb_statfs(ssp, sbp, scred);
407 smbfs_free_scred(scred);
408 return (error);
409 }
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