aboutsummaryrefslogtreecommitdiff
path: root/sys/fs/smbfs/smbfs_vfsops.c
blob: a1ae565c6341ad8c6cefb099de2aa7912eeeafce (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2000-2001 Boris Popov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sx.h>

#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>

#include <fs/smbfs/smbfs.h>
#include <fs/smbfs/smbfs_node.h>
#include <fs/smbfs/smbfs_subr.h>

static int smbfs_debuglevel = 0;

static int smbfs_version = SMBFS_VERSION;

SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
    "SMB/CIFS filesystem");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");

static vfs_init_t       smbfs_init;
static vfs_uninit_t     smbfs_uninit;
static vfs_cmount_t     smbfs_cmount;
static vfs_mount_t      smbfs_mount;
static vfs_root_t       smbfs_root;
static vfs_quotactl_t   smbfs_quotactl;
static vfs_statfs_t     smbfs_statfs;
static vfs_unmount_t    smbfs_unmount;

static struct vfsops smbfs_vfsops = {
	.vfs_init =		smbfs_init,
	.vfs_cmount =		smbfs_cmount,
	.vfs_mount =		smbfs_mount,
	.vfs_quotactl =		smbfs_quotactl,
	.vfs_root =		smbfs_root,
	.vfs_statfs =		smbfs_statfs,
	.vfs_sync =		vfs_stdsync,
	.vfs_uninit =		smbfs_uninit,
	.vfs_unmount =		smbfs_unmount,
};

VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);

MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);

uma_zone_t smbfs_pbuf_zone;

static int
smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags)
{
	struct smbfs_args args;
	int error;

	error = copyin(data, &args, sizeof(struct smbfs_args));
	if (error)
		return error;

	if (args.version != SMBFS_VERSION) {
		printf("mount version mismatch: kernel=%d, mount=%d\n",
		    SMBFS_VERSION, args.version);
		return EINVAL;
	}
	ma = mount_argf(ma, "dev", "%d", args.dev);
	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft");
	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr");
	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong");
	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls");
	ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong");
	ma = mount_arg(ma, "rootpath", args.root_path, -1);
	ma = mount_argf(ma, "uid", "%d", args.uid);
	ma = mount_argf(ma, "gid", "%d", args.gid);
	ma = mount_argf(ma, "file_mode", "%d", args.file_mode);
	ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode);
	ma = mount_argf(ma, "caseopt", "%d", args.caseopt);

	error = kernel_mount(ma, flags);

	return (error);
}

static const char *smbfs_opts[] = {
	"fd", "soft", "intr", "strong", "have_nls", "long",
	"mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode",
	"caseopt", "errmsg", NULL
};

static int
smbfs_mount(struct mount *mp)
{
	struct smbmount *smp = NULL;
	struct smb_vc *vcp;
	struct smb_share *ssp = NULL;
	struct vnode *vp;
	struct thread *td;
	struct smb_dev *dev;
	struct smb_cred *scred;
	int error, v;
	char *pc, *pe;

	dev = NULL;
	td = curthread;
	if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
		return EOPNOTSUPP;

	if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
		vfs_mount_error(mp, "%s", "Invalid option");
		return (EINVAL);
	}

	scred = smbfs_malloc_scred();
	smb_makescred(scred, td, td->td_ucred);

	/* Ask userspace of `fd`, the file descriptor of this session */
	if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) {
		vfs_mount_error(mp, "No fd option");
		smbfs_free_scred(scred);
		return (EINVAL);
	}
	error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev);
	smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO);
	if (error) {
		printf("invalid device handle %d (%d)\n", v, error);
		vfs_mount_error(mp, "invalid device handle %d %d\n", v, error);
		smbfs_free_scred(scred);
		free(smp, M_SMBFSDATA);
		return error;
	}
	vcp = SSTOVC(ssp);
	smb_share_unlock(ssp);
	mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
	mp->mnt_data = smp;
	smp->sm_share = ssp;
	smp->sm_root = NULL;
	smp->sm_dev = dev;
	if (1 != vfs_scanopt(mp->mnt_optnew,
	    "caseopt", "%d", &smp->sm_caseopt)) {
		vfs_mount_error(mp, "Invalid caseopt");
		error = EINVAL;
		goto bad;
	}
	if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
		vfs_mount_error(mp, "Invalid uid");
		error = EINVAL;
		goto bad;
	}
	smp->sm_uid = v;

	if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
		vfs_mount_error(mp, "Invalid gid");
		error = EINVAL;
		goto bad;
	}
	smp->sm_gid = v;

	if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
		vfs_mount_error(mp, "Invalid file_mode");
		error = EINVAL;
		goto bad;
	}
	smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;

	if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
		vfs_mount_error(mp, "Invalid dir_mode");
		error = EINVAL;
		goto bad;
	}
	smp->sm_dir_mode  = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;

	vfs_flagopt(mp->mnt_optnew,
	    "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);

	pc = mp->mnt_stat.f_mntfromname;
	pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
	bzero(pc, MNAMELEN);
	*pc++ = '/';
	*pc++ = '/';
	pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
	if (pc < pe-1) {
		*(pc++) = '@';
		pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
		if (pc < pe - 1) {
			*(pc++) = '/';
			strncpy(pc, ssp->ss_name, pe - pc - 2);
		}
	}
	vfs_getnewfsid(mp);
	error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
	if (error) {
		vfs_mount_error(mp, "smbfs_root error: %d", error);
		goto bad;
	}
	VOP_UNLOCK(vp);
	SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));

#ifdef DIAGNOSTIC
	SMBERROR("mp=%p\n", mp);
#endif
	smbfs_free_scred(scred);
	return error;
bad:
	if (ssp)
		smb_share_put(ssp, scred);
	smbfs_free_scred(scred);	
	SMB_LOCK();
	if (error && smp->sm_dev == dev) {
		smp->sm_dev = NULL;
		sdp_trydestroy(dev);
	}
	SMB_UNLOCK();
	free(smp, M_SMBFSDATA);
	return error;
}

/* Unmount the filesystem described by mp. */
static int
smbfs_unmount(struct mount *mp, int mntflags)
{
	struct thread *td;
	struct smbmount *smp = VFSTOSMBFS(mp);
	struct smb_cred *scred;
	struct smb_dev *dev;
	int error, flags;

	SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
	td = curthread;
	flags = 0;
	if (mntflags & MNT_FORCE)
		flags |= FORCECLOSE;
	/*
	 * Keep trying to flush the vnode list for the mount while 
	 * some are still busy and we are making progress towards
	 * making them not busy. This is needed because smbfs vnodes
	 * reference their parent directory but may appear after their
	 * parent in the list; one pass over the vnode list is not
	 * sufficient in this case.
	 */
	do {
		smp->sm_didrele = 0;
		/* There is 1 extra root vnode reference from smbfs_mount(). */
		error = vflush(mp, 1, flags, td);
	} while (error == EBUSY && smp->sm_didrele != 0);
	if (error)
		return error;
	scred = smbfs_malloc_scred();
	smb_makescred(scred, td, td->td_ucred);
	error = smb_share_lock(smp->sm_share);
	if (error)
		goto out;
	smb_share_put(smp->sm_share, scred);
	SMB_LOCK();
	dev = smp->sm_dev;
	if (!dev)
		panic("No private data for mount point");
	sdp_trydestroy(dev);
	mp->mnt_data = NULL;
	SMB_UNLOCK();
	free(smp, M_SMBFSDATA);
	MNT_ILOCK(mp);
	mp->mnt_flag &= ~MNT_LOCAL;
	MNT_IUNLOCK(mp);
out:
	smbfs_free_scred(scred);
	return error;
}

/* 
 * Return locked root vnode of a filesystem
 */
static int
smbfs_root(struct mount *mp, int flags, struct vnode **vpp)
{
	struct smbmount *smp = VFSTOSMBFS(mp);
	struct vnode *vp;
	struct smbnode *np;
	struct smbfattr fattr;
	struct thread *td;
	struct ucred *cred;
	struct smb_cred *scred;
	int error;

	td = curthread;
	cred = td->td_ucred;

	if (smp->sm_root) {
		*vpp = SMBTOV(smp->sm_root);
		return vget(*vpp, LK_EXCLUSIVE | LK_RETRY);
	}
	scred = smbfs_malloc_scred();
	smb_makescred(scred, td, cred);
	error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, scred);
	if (error)
		goto out;
	error = smbfs_nget(mp, NULL, NULL, 0, &fattr, &vp);
	if (error)
		goto out;
	ASSERT_VOP_LOCKED(vp, "smbfs_root");
	vp->v_vflag |= VV_ROOT;
	np = VTOSMB(vp);
	smp->sm_root = np;
	*vpp = vp;
out:
	smbfs_free_scred(scred);
	return error;
}

/*
 * Do operations associated with quotas, not supported
 */
/* ARGSUSED */
static int
smbfs_quotactl(mp, cmd, uid, arg, mp_busy)
	struct mount *mp;
	int cmd;
	uid_t uid;
	void *arg;
	bool *mp_busy;
{
	SMBVDEBUG("return EOPNOTSUPP\n");
	return EOPNOTSUPP;
}

/*ARGSUSED*/
int
smbfs_init(struct vfsconf *vfsp)
{

	smbfs_pbuf_zone = pbuf_zsecond_create("smbpbuf", nswbuf / 2);
	SMBVDEBUG("done.\n");
	return 0;
}

/*ARGSUSED*/
int
smbfs_uninit(struct vfsconf *vfsp)
{

	uma_zdestroy(smbfs_pbuf_zone);
	SMBVDEBUG("done.\n");
	return 0;
}

/*
 * smbfs_statfs call
 */
int
smbfs_statfs(struct mount *mp, struct statfs *sbp)
{
	struct thread *td = curthread;
	struct smbmount *smp = VFSTOSMBFS(mp);
	struct smbnode *np = smp->sm_root;
	struct smb_share *ssp = smp->sm_share;
	struct smb_cred *scred;
	int error;

	if (np == NULL) {
		vfs_mount_error(mp, "np == NULL");
		return EINVAL;
	}

	sbp->f_iosize = SSTOVC(ssp)->vc_txmax;		/* optimal transfer block size */
	scred = smbfs_malloc_scred();
	smb_makescred(scred, td, td->td_ucred);
	error = smbfs_smb_statfs(ssp, sbp, scred);
	smbfs_free_scred(scred);
	return (error);
}