1 | /* $NetBSD: smbfs_vfsops.c,v 1.104 2014/12/21 10:48:53 hannken Exp $ */ |
2 | |
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 | * 3. All advertising materials mentioning features or use of this software |
16 | * must display the following acknowledgement: |
17 | * This product includes software developed by Boris Popov. |
18 | * 4. Neither the name of the author nor the names of any co-contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * FreeBSD: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.5 2001/12/13 13:08:34 sheldonh Exp |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: smbfs_vfsops.c,v 1.104 2014/12/21 10:48:53 hannken Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/systm.h> |
42 | #include <sys/proc.h> |
43 | #include <sys/buf.h> |
44 | #include <sys/kernel.h> |
45 | #include <sys/dirent.h> |
46 | #include <sys/sysctl.h> |
47 | #include <sys/vnode.h> |
48 | #include <sys/mount.h> |
49 | #include <sys/stat.h> |
50 | #include <sys/malloc.h> |
51 | #include <sys/kauth.h> |
52 | #include <sys/module.h> |
53 | #include <miscfs/genfs/genfs.h> |
54 | |
55 | |
56 | #include <netsmb/smb.h> |
57 | #include <netsmb/smb_conn.h> |
58 | #include <netsmb/smb_subr.h> |
59 | #include <netsmb/smb_dev.h> |
60 | |
61 | #include <fs/smbfs/smbfs.h> |
62 | #include <fs/smbfs/smbfs_node.h> |
63 | #include <fs/smbfs/smbfs_subr.h> |
64 | |
65 | MODULE(MODULE_CLASS_VFS, smbfs, "nsmb" ); |
66 | |
67 | VFS_PROTOS(smbfs); |
68 | |
69 | static struct sysctllog *smbfs_sysctl_log; |
70 | |
71 | static int smbfs_setroot(struct mount *); |
72 | |
73 | extern struct vnodeopv_desc smbfs_vnodeop_opv_desc; |
74 | |
75 | static const struct vnodeopv_desc *smbfs_vnodeopv_descs[] = { |
76 | &smbfs_vnodeop_opv_desc, |
77 | NULL, |
78 | }; |
79 | |
80 | struct vfsops smbfs_vfsops = { |
81 | .vfs_name = MOUNT_SMBFS, |
82 | .vfs_min_mount_data = sizeof (struct smbfs_args), |
83 | .vfs_mount = smbfs_mount, |
84 | .vfs_start = smbfs_start, |
85 | .vfs_unmount = smbfs_unmount, |
86 | .vfs_root = smbfs_root, |
87 | .vfs_quotactl = (void *)eopnotsupp, |
88 | .vfs_statvfs = smbfs_statvfs, |
89 | .vfs_sync = smbfs_sync, |
90 | .vfs_vget = smbfs_vget, |
91 | .vfs_loadvnode = smbfs_loadvnode, |
92 | .vfs_fhtovp = (void *)eopnotsupp, |
93 | .vfs_vptofh = (void *)eopnotsupp, |
94 | .vfs_init = smbfs_init, |
95 | .vfs_reinit = smbfs_reinit, |
96 | .vfs_done = smbfs_done, |
97 | .vfs_mountroot = (void *)eopnotsupp, |
98 | .vfs_snapshot = (void *)eopnotsupp, |
99 | .vfs_extattrctl = vfs_stdextattrctl, |
100 | .vfs_suspendctl = (void *)eopnotsupp, |
101 | .vfs_renamelock_enter = genfs_renamelock_enter, |
102 | .vfs_renamelock_exit = genfs_renamelock_exit, |
103 | .vfs_fsync = (void *)eopnotsupp, |
104 | .vfs_opv_descs = smbfs_vnodeopv_descs |
105 | }; |
106 | |
107 | static int |
108 | smbfs_modcmd(modcmd_t cmd, void *arg) |
109 | { |
110 | const struct sysctlnode *smb = NULL; |
111 | int error; |
112 | |
113 | switch (cmd) { |
114 | case MODULE_CMD_INIT: |
115 | error = vfs_attach(&smbfs_vfsops); |
116 | if (error != 0) |
117 | break; |
118 | sysctl_createv(&smbfs_sysctl_log, 0, NULL, &smb, |
119 | CTLFLAG_PERMANENT, |
120 | CTLTYPE_NODE, "samba" , |
121 | SYSCTL_DESCR("SMB/CIFS remote file system" ), |
122 | NULL, 0, NULL, 0, |
123 | CTL_VFS, CTL_CREATE, CTL_EOL); |
124 | |
125 | if (smb != NULL) { |
126 | sysctl_createv(&smbfs_sysctl_log, 0, &smb, NULL, |
127 | CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, |
128 | CTLTYPE_INT, "version" , |
129 | SYSCTL_DESCR("smbfs version" ), |
130 | NULL, SMBFS_VERSION, NULL, 0, |
131 | CTL_CREATE, CTL_EOL); |
132 | } |
133 | break; |
134 | case MODULE_CMD_FINI: |
135 | error = vfs_detach(&smbfs_vfsops); |
136 | if (error != 0) |
137 | break; |
138 | sysctl_teardown(&smbfs_sysctl_log); |
139 | break; |
140 | default: |
141 | error = ENOTTY; |
142 | break; |
143 | } |
144 | |
145 | return (error); |
146 | } |
147 | |
148 | int |
149 | smbfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) |
150 | { |
151 | struct lwp *l = curlwp; |
152 | struct smbfs_args *args = data; /* holds data from mount request */ |
153 | struct smbmount *smp = NULL; |
154 | struct smb_vc *vcp; |
155 | struct smb_share *ssp = NULL; |
156 | struct smb_cred scred; |
157 | char *fromname; |
158 | int error; |
159 | |
160 | if (args == NULL) |
161 | return EINVAL; |
162 | if (*data_len < sizeof *args) |
163 | return EINVAL; |
164 | |
165 | if (mp->mnt_flag & MNT_GETARGS) { |
166 | smp = VFSTOSMBFS(mp); |
167 | if (smp == NULL) |
168 | return EIO; |
169 | *args = smp->sm_args; |
170 | *data_len = sizeof *args; |
171 | return 0; |
172 | } |
173 | |
174 | if (mp->mnt_flag & MNT_UPDATE) |
175 | return EOPNOTSUPP; |
176 | |
177 | if (args->version != SMBFS_VERSION) { |
178 | SMBVDEBUG("mount version mismatch: kernel=%d, mount=%d\n" , |
179 | SMBFS_VERSION, args->version); |
180 | return EINVAL; |
181 | } |
182 | |
183 | smb_makescred(&scred, l, l->l_cred); |
184 | error = smb_dev2share(args->dev_fd, SMBM_EXEC, &scred, &ssp); |
185 | if (error) |
186 | return error; |
187 | smb_share_unlock(ssp); /* keep ref, but unlock */ |
188 | vcp = SSTOVC(ssp); |
189 | |
190 | fromname = kmem_zalloc(MNAMELEN, KM_SLEEP); |
191 | snprintf(fromname, MNAMELEN, |
192 | "//%s@%s/%s" , vcp->vc_username, vcp->vc_srvname, ssp->ss_name); |
193 | error = set_statvfs_info(path, UIO_USERSPACE, fromname, UIO_SYSSPACE, |
194 | mp->mnt_op->vfs_name, mp, l); |
195 | kmem_free(fromname, MNAMELEN); |
196 | if (error) { |
197 | smb_share_lock(ssp); |
198 | smb_share_put(ssp, &scred); |
199 | return error; |
200 | } |
201 | |
202 | mp->mnt_stat.f_iosize = vcp->vc_txmax; |
203 | mp->mnt_stat.f_namemax = |
204 | (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12; |
205 | |
206 | smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_ZERO); |
207 | mp->mnt_data = smp; |
208 | |
209 | smp->sm_share = ssp; |
210 | smp->sm_root = NULL; |
211 | smp->sm_args = *args; |
212 | smp->sm_caseopt = args->caseopt; |
213 | smp->sm_args.file_mode = (smp->sm_args.file_mode & |
214 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; |
215 | smp->sm_args.dir_mode = (smp->sm_args.dir_mode & |
216 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; |
217 | |
218 | vfs_getnewfsid(mp); |
219 | return (0); |
220 | } |
221 | |
222 | /* Unmount the filesystem described by mp. */ |
223 | int |
224 | smbfs_unmount(struct mount *mp, int mntflags) |
225 | { |
226 | struct lwp *l = curlwp; |
227 | struct smbmount *smp = VFSTOSMBFS(mp); |
228 | struct smb_cred scred; |
229 | struct vnode *smbfs_rootvp = SMBTOV(smp->sm_root); |
230 | int error, flags; |
231 | |
232 | SMBVDEBUG("smbfs_unmount: flags=%04x\n" , mntflags); |
233 | flags = 0; |
234 | if (mntflags & MNT_FORCE) |
235 | flags |= FORCECLOSE; |
236 | |
237 | if (smbfs_rootvp->v_usecount > 1 && (mntflags & MNT_FORCE) == 0) |
238 | return EBUSY; |
239 | |
240 | /* Flush all vnodes. |
241 | * Keep trying to flush the vnode list for the mount while |
242 | * some are still busy and we are making progress towards |
243 | * making them not busy. This is needed because smbfs vnodes |
244 | * reference their parent directory but may appear after their |
245 | * parent in the list; one pass over the vnode list is not |
246 | * sufficient in this case. */ |
247 | do { |
248 | smp->sm_didrele = 0; |
249 | error = vflush(mp, smbfs_rootvp, flags); |
250 | } while (error == EBUSY && smp->sm_didrele != 0); |
251 | if (error) |
252 | return error; |
253 | |
254 | vgone(smbfs_rootvp); |
255 | |
256 | smb_makescred(&scred, l, l->l_cred); |
257 | smb_share_lock(smp->sm_share); |
258 | smb_share_put(smp->sm_share, &scred); |
259 | mp->mnt_data = NULL; |
260 | |
261 | free(smp, M_SMBFSDATA); |
262 | return 0; |
263 | } |
264 | |
265 | /* |
266 | * Get root vnode of the smbfs filesystem, and store it in sm_root. |
267 | */ |
268 | static int |
269 | smbfs_setroot(struct mount *mp) |
270 | { |
271 | struct smbmount *smp = VFSTOSMBFS(mp); |
272 | struct vnode *vp; |
273 | struct smbfattr fattr; |
274 | struct lwp *l = curlwp; |
275 | kauth_cred_t cred = l->l_cred; |
276 | struct smb_cred scred; |
277 | int error; |
278 | |
279 | KASSERT(smp->sm_root == NULL); |
280 | |
281 | smb_makescred(&scred, l, cred); |
282 | error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); |
283 | if (error) |
284 | return error; |
285 | error = smbfs_nget(mp, NULL, "TheRooT" , 7, &fattr, &vp); |
286 | if (error) |
287 | return error; |
288 | |
289 | /* |
290 | * Someone might have already set sm_root while we slept |
291 | * in smb_lookup or vnode allocation. |
292 | */ |
293 | if (smp->sm_root) { |
294 | KASSERT(smp->sm_root == VTOSMB(vp)); |
295 | vrele(vp); |
296 | } else { |
297 | vp->v_vflag |= VV_ROOT; |
298 | smp->sm_root = VTOSMB(vp); |
299 | } |
300 | |
301 | return (0); |
302 | } |
303 | |
304 | /* |
305 | * Return locked root vnode of a filesystem. |
306 | */ |
307 | int |
308 | smbfs_root(struct mount *mp, struct vnode **vpp) |
309 | { |
310 | struct smbmount *smp = VFSTOSMBFS(mp); |
311 | int error; |
312 | |
313 | if (__predict_false(!smp->sm_root)) { |
314 | error = smbfs_setroot(mp); |
315 | if (error) |
316 | return (error); |
317 | /* fallthrough */ |
318 | } |
319 | |
320 | KASSERT(smp->sm_root != NULL && SMBTOV(smp->sm_root) != NULL); |
321 | *vpp = SMBTOV(smp->sm_root); |
322 | vref(*vpp); |
323 | error = vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY); |
324 | if (error) |
325 | vrele(*vpp); |
326 | return error; |
327 | } |
328 | |
329 | /* |
330 | * Make a filesystem operational. |
331 | * Nothing to do at the moment. |
332 | */ |
333 | /* ARGSUSED */ |
334 | int |
335 | smbfs_start(struct mount *mp, int flags) |
336 | { |
337 | SMBVDEBUG("flags=%04x\n" , flags); |
338 | return 0; |
339 | } |
340 | |
341 | void |
342 | smbfs_init(void) |
343 | { |
344 | |
345 | malloc_type_attach(M_SMBNODENAME); |
346 | malloc_type_attach(M_SMBFSDATA); |
347 | pool_init(&smbfs_node_pool, sizeof(struct smbnode), 0, 0, 0, |
348 | "smbfsnopl" , &pool_allocator_nointr, IPL_NONE); |
349 | |
350 | SMBVDEBUG0("init.\n" ); |
351 | } |
352 | |
353 | void |
354 | smbfs_reinit(void) |
355 | { |
356 | |
357 | SMBVDEBUG0("reinit.\n" ); |
358 | } |
359 | |
360 | void |
361 | smbfs_done(void) |
362 | { |
363 | |
364 | pool_destroy(&smbfs_node_pool); |
365 | malloc_type_detach(M_SMBNODENAME); |
366 | malloc_type_detach(M_SMBFSDATA); |
367 | |
368 | SMBVDEBUG0("done.\n" ); |
369 | } |
370 | |
371 | /* |
372 | * smbfs_statvfs call |
373 | */ |
374 | int |
375 | smbfs_statvfs(struct mount *mp, struct statvfs *sbp) |
376 | { |
377 | struct lwp *l = curlwp; |
378 | struct smbmount *smp = VFSTOSMBFS(mp); |
379 | struct smb_share *ssp = smp->sm_share; |
380 | struct smb_cred scred; |
381 | int error = 0; |
382 | |
383 | sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ |
384 | smb_makescred(&scred, l, l->l_cred); |
385 | |
386 | error = smbfs_smb_statvfs(ssp, sbp, &scred); |
387 | if (error) |
388 | return error; |
389 | |
390 | sbp->f_flag = 0; /* copy of mount exported flags */ |
391 | sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ |
392 | copy_statvfs_info(sbp, mp); |
393 | return 0; |
394 | } |
395 | |
396 | static bool |
397 | smbfs_sync_selector(void *cl, struct vnode *vp) |
398 | { |
399 | struct smbnode *np; |
400 | |
401 | np = VTOSMB(vp); |
402 | if (np == NULL) |
403 | return false; |
404 | |
405 | if ((vp->v_type == VNON || (np->n_flag & NMODIFIED) == 0) && |
406 | LIST_EMPTY(&vp->v_dirtyblkhd) && |
407 | UVM_OBJ_IS_CLEAN(&vp->v_uobj)) |
408 | return false; |
409 | |
410 | return true; |
411 | } |
412 | |
413 | /* |
414 | * Flush out the buffer cache |
415 | */ |
416 | int |
417 | smbfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) |
418 | { |
419 | struct vnode *vp; |
420 | struct vnode_iterator *marker; |
421 | int error, allerror = 0; |
422 | |
423 | vfs_vnode_iterator_init(mp, &marker); |
424 | while ((vp = vfs_vnode_iterator_next(marker, smbfs_sync_selector, |
425 | NULL))) |
426 | { |
427 | error = vn_lock(vp, LK_EXCLUSIVE); |
428 | if (error) { |
429 | vrele(vp); |
430 | continue; |
431 | } |
432 | error = VOP_FSYNC(vp, cred, |
433 | waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); |
434 | if (error) |
435 | allerror = error; |
436 | vput(vp); |
437 | } |
438 | vfs_vnode_iterator_destroy(marker); |
439 | return (allerror); |
440 | } |
441 | |
442 | #if __FreeBSD_version < 400009 |
443 | /* |
444 | * smbfs flat namespace lookup. Unsupported. |
445 | */ |
446 | /* ARGSUSED */ |
447 | int smbfs_vget(struct mount *mp, ino_t ino, |
448 | struct vnode **vpp) |
449 | { |
450 | return (EOPNOTSUPP); |
451 | } |
452 | |
453 | #endif /* __FreeBSD_version < 400009 */ |
454 | |