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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/proc.h>
32#include <sys/bio.h>
33#include <sys/buf.h>
34#include <sys/kernel.h>
35#include <sys/sysctl.h>
36#include <sys/vnode.h>
37#include <sys/mount.h>
38#include <sys/stat.h>
39#include <sys/malloc.h>
40#include <sys/module.h>
41#include <sys/sx.h>
42
43
44#include <netsmb/smb.h>
45#include <netsmb/smb_conn.h>
46#include <netsmb/smb_subr.h>
47#include <netsmb/smb_dev.h>
48
49#include <fs/smbfs/smbfs.h>
50#include <fs/smbfs/smbfs_node.h>
51#include <fs/smbfs/smbfs_subr.h>
52
53static int smbfs_debuglevel = 0;
54
55static int smbfs_version = SMBFS_VERSION;
56
57#ifdef SMBFS_USEZONE
58#include <vm/vm.h>
59#include <vm/vm_extern.h>
60
61vm_zone_t smbfsmount_zone;
62#endif
63
64SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem");
65SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
66SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
67
68static MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table");
69
70static vfs_init_t       smbfs_init;
71static vfs_uninit_t     smbfs_uninit;
72static vfs_cmount_t     smbfs_cmount;
73static vfs_mount_t      smbfs_mount;
74static vfs_root_t       smbfs_root;
75static vfs_quotactl_t   smbfs_quotactl;
76static vfs_statfs_t     smbfs_statfs;
77static vfs_unmount_t    smbfs_unmount;
78
79static struct vfsops smbfs_vfsops = {
80	.vfs_init =		smbfs_init,
81	.vfs_cmount =		smbfs_cmount,
82	.vfs_mount =		smbfs_mount,
83	.vfs_quotactl =		smbfs_quotactl,
84	.vfs_root =		smbfs_root,
85	.vfs_statfs =		smbfs_statfs,
86	.vfs_sync =		vfs_stdsync,
87	.vfs_uninit =		smbfs_uninit,
88	.vfs_unmount =		smbfs_unmount,
89};
90
91
92VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
93
94MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
95MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
96MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
97
98int smbfs_pbuf_freecnt = -1;	/* start out unlimited */
99
100static int
101smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags)
102{
103	struct smbfs_args args;
104	int error;
105
106	error = copyin(data, &args, sizeof(struct smbfs_args));
107	if (error)
108		return error;
109
110	if (args.version != SMBFS_VERSION) {
111		printf("mount version mismatch: kernel=%d, mount=%d\n",
112		    SMBFS_VERSION, args.version);
113		return EINVAL;
114	}
115	ma = mount_argf(ma, "dev", "%d", args.dev);
116	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft");
117	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr");
118	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong");
119	ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls");
120	ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong");
121	ma = mount_arg(ma, "rootpath", args.root_path, -1);
122	ma = mount_argf(ma, "uid", "%d", args.uid);
123	ma = mount_argf(ma, "gid", "%d", args.gid);
124	ma = mount_argf(ma, "file_mode", "%d", args.file_mode);
125	ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode);
126	ma = mount_argf(ma, "caseopt", "%d", args.caseopt);
127
128	error = kernel_mount(ma, flags);
129
130	return (error);
131}
132
133static const char *smbfs_opts[] = {
134	"dev", "soft", "intr", "strong", "have_nls", "long",
135	"mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode",
136	"caseopt", "errmsg", NULL
137};
138
139static int
140smbfs_mount(struct mount *mp)
141{
142	struct smbmount *smp = NULL;
143	struct smb_vc *vcp;
144	struct smb_share *ssp = NULL;
145	struct vnode *vp;
146	struct thread *td;
147	struct smb_cred scred;
148	int error, v;
149	char *pc, *pe;
150
151	td = curthread;
152	if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
153		return EOPNOTSUPP;
154
155	if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
156		vfs_mount_error(mp, "%s", "Invalid option");
157		return (EINVAL);
158	}
159
160	smb_makescred(&scred, td, td->td_ucred);
161	if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) {
162		vfs_mount_error(mp, "No dev option");
163		return (EINVAL);
164	}
165	error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp);
166	if (error) {
167		printf("invalid device handle %d (%d)\n", v, error);
168		vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error);
169		return error;
170	}
171	vcp = SSTOVC(ssp);
172	smb_share_unlock(ssp, 0);
173	mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
174
175#ifdef SMBFS_USEZONE
176	smp = zalloc(smbfsmount_zone);
177#else
178	smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK);
179#endif
180        if (smp == NULL) {
181		printf("could not alloc smbmount\n");
182		vfs_mount_error(mp, "could not alloc smbmount", v, error);
183		error = ENOMEM;
184		goto bad;
185        }
186	bzero(smp, sizeof(*smp));
187        mp->mnt_data = smp;
188	smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
189	if (smp->sm_hash == NULL)
190		goto bad;
191	sx_init(&smp->sm_hashlock, "smbfsh");
192	smp->sm_share = ssp;
193	smp->sm_root = NULL;
194	if (1 != vfs_scanopt(mp->mnt_optnew,
195	    "caseopt", "%d", &smp->sm_caseopt)) {
196		vfs_mount_error(mp, "Invalid caseopt");
197		error = EINVAL;
198		goto bad;
199	}
200	if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
201		vfs_mount_error(mp, "Invalid uid");
202		error = EINVAL;
203		goto bad;
204	}
205	smp->sm_uid = v;
206
207	if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
208		vfs_mount_error(mp, "Invalid gid");
209		error = EINVAL;
210		goto bad;
211	}
212	smp->sm_gid = v;
213
214	if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
215		vfs_mount_error(mp, "Invalid file_mode");
216		error = EINVAL;
217		goto bad;
218	}
219	smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
220
221	if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
222		vfs_mount_error(mp, "Invalid dir_mode");
223		error = EINVAL;
224		goto bad;
225	}
226	smp->sm_dir_mode  = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
227
228	vfs_flagopt(mp->mnt_optnew,
229	    "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);
230
231/*	simple_lock_init(&smp->sm_npslock);*/
232	pc = mp->mnt_stat.f_mntfromname;
233	pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
234	bzero(pc, MNAMELEN);
235	*pc++ = '/';
236	*pc++ = '/';
237	pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
238	if (pc < pe-1) {
239		*(pc++) = '@';
240		pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
241		if (pc < pe - 1) {
242			*(pc++) = '/';
243			strncpy(pc, ssp->ss_name, pe - pc - 2);
244		}
245	}
246	vfs_getnewfsid(mp);
247	error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
248	if (error) {
249		vfs_mount_error(mp, "smbfs_root error: %d", error);
250		goto bad;
251	}
252	VOP_UNLOCK(vp, 0);
253	SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
254
255#ifdef DIAGNOSTIC
256	SMBERROR("mp=%p\n", mp);
257#endif
258	return error;
259bad:
260        if (smp) {
261		if (smp->sm_hash)
262			free(smp->sm_hash, M_SMBFSHASH);
263		sx_destroy(&smp->sm_hashlock);
264#ifdef SMBFS_USEZONE
265		zfree(smbfsmount_zone, smp);
266#else
267		free(smp, M_SMBFSDATA);
268#endif
269	}
270	if (ssp)
271		smb_share_put(ssp, &scred);
272        return error;
273}
274
275/* Unmount the filesystem described by mp. */
276static int
277smbfs_unmount(struct mount *mp, int mntflags)
278{
279	struct thread *td;
280	struct smbmount *smp = VFSTOSMBFS(mp);
281	struct smb_cred scred;
282	int error, flags;
283
284	SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
285	td = curthread;
286	flags = 0;
287	if (mntflags & MNT_FORCE)
288		flags |= FORCECLOSE;
289	/*
290	 * Keep trying to flush the vnode list for the mount while
291	 * some are still busy and we are making progress towards
292	 * making them not busy. This is needed because smbfs vnodes
293	 * reference their parent directory but may appear after their
294	 * parent in the list; one pass over the vnode list is not
295	 * sufficient in this case.
296	 */
297	do {
298		smp->sm_didrele = 0;
299		/* There is 1 extra root vnode reference from smbfs_mount(). */
300		error = vflush(mp, 1, flags, td);
301	} while (error == EBUSY && smp->sm_didrele != 0);
302	if (error)
303		return error;
304	smb_makescred(&scred, td, td->td_ucred);
305	error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE);
306	if (error)
307		return error;
308	smb_share_put(smp->sm_share, &scred);
309	mp->mnt_data = NULL;
310
311	if (smp->sm_hash)
312		free(smp->sm_hash, M_SMBFSHASH);
313	sx_destroy(&smp->sm_hashlock);
314#ifdef SMBFS_USEZONE
315	zfree(smbfsmount_zone, smp);
316#else
317	free(smp, M_SMBFSDATA);
318#endif
319	MNT_ILOCK(mp);
320	mp->mnt_flag &= ~MNT_LOCAL;
321	MNT_IUNLOCK(mp);
322	return error;
323}
324
325/*
326 * Return locked root vnode of a filesystem
327 */
328static int
329smbfs_root(struct mount *mp, int flags, struct vnode **vpp)
330{
331	struct smbmount *smp = VFSTOSMBFS(mp);
332	struct vnode *vp;
333	struct smbnode *np;
334	struct smbfattr fattr;
335	struct thread *td;
336	struct ucred *cred;
337	struct smb_cred scred;
338	int error;
339
340	td = curthread;
341	cred = td->td_ucred;
342
343	if (smp == NULL) {
344		SMBERROR("smp == NULL (bug in umount)\n");
345		vfs_mount_error(mp, "smp == NULL (bug in umount)");
346		return EINVAL;
347	}
348	if (smp->sm_root) {
349		*vpp = SMBTOV(smp->sm_root);
350		return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td);
351	}
352	smb_makescred(&scred, td, cred);
353	error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
354	if (error)
355		return error;
356	error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
357	if (error)
358		return error;
359	ASSERT_VOP_LOCKED(vp, "smbfs_root");
360	vp->v_vflag |= VV_ROOT;
361	np = VTOSMB(vp);
362	smp->sm_root = np;
363	*vpp = vp;
364	return 0;
365}
366
367/*
368 * Do operations associated with quotas, not supported
369 */
370/* ARGSUSED */
371static int
372smbfs_quotactl(mp, cmd, uid, arg)
373	struct mount *mp;
374	int cmd;
375	uid_t uid;
376	void *arg;
377{
378	SMBVDEBUG("return EOPNOTSUPP\n");
379	return EOPNOTSUPP;
380}
381
382/*ARGSUSED*/
383int
384smbfs_init(struct vfsconf *vfsp)
385{
386#ifdef SMBFS_USEZONE
387	smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
388#endif
389	smbfs_pbuf_freecnt = nswbuf / 2 + 1;
390	SMBVDEBUG("done.\n");
391	return 0;
392}
393
394/*ARGSUSED*/
395int
396smbfs_uninit(struct vfsconf *vfsp)
397{
398
399	SMBVDEBUG("done.\n");
400	return 0;
401}
402
403/*
404 * smbfs_statfs call
405 */
406int
407smbfs_statfs(struct mount *mp, struct statfs *sbp)
408{
409	struct thread *td = curthread;
410	struct smbmount *smp = VFSTOSMBFS(mp);
411	struct smbnode *np = smp->sm_root;
412	struct smb_share *ssp = smp->sm_share;
413	struct smb_cred scred;
414	int error;
415
416	if (np == NULL) {
417		vfs_mount_error(mp, "np == NULL");
418		return EINVAL;
419	}
420
421	sbp->f_iosize = SSTOVC(ssp)->vc_txmax;		/* optimal transfer block size */
422	smb_makescred(&scred, td, td->td_ucred);
423	error = smbfs_smb_statfs(ssp, sbp, &scred);
424	if (error == 0)
425		sbp->f_flags = 0;	/* copy of mount exported flags */
426	return (error);
427}
428