1 /*-
2 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
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: releng/9.0/sys/fs/hpfs/hpfs_vfsops.c 222167 2011-05-22 01:07:54Z rmacklem $
27 */
28
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/namei.h>
33 #include <sys/conf.h>
34 #include <sys/proc.h>
35 #include <sys/kernel.h>
36 #include <sys/vnode.h>
37 #include <sys/mount.h>
38 #include <sys/bio.h>
39 #include <sys/buf.h>
40 #include <sys/fcntl.h>
41 #include <sys/malloc.h>
42
43 #include <geom/geom.h>
44 #include <geom/geom_vfs.h>
45
46 #include <vm/vm.h>
47 #include <vm/vm_param.h>
48 #include <vm/vm_page.h>
49 #include <vm/vm_object.h>
50 #include <vm/vm_extern.h>
51
52 #include <fs/hpfs/hpfs.h>
53 #include <fs/hpfs/hpfsmount.h>
54 #include <fs/hpfs/hpfs_subr.h>
55
56 MALLOC_DEFINE(M_HPFSMNT, "hpfs_mount", "HPFS mount structure");
57 MALLOC_DEFINE(M_HPFSNO, "hpfs_node", "HPFS node structure");
58
59 struct sockaddr;
60
61 static int hpfs_mountfs(register struct vnode *, struct mount *,
62 struct thread *);
63
64 static vfs_fhtovp_t hpfs_fhtovp;
65 static vfs_vget_t hpfs_vget;
66 static vfs_cmount_t hpfs_cmount;
67 static vfs_mount_t hpfs_mount;
68 static vfs_root_t hpfs_root;
69 static vfs_statfs_t hpfs_statfs;
70 static vfs_unmount_t hpfs_unmount;
71
72 static int
73 hpfs_cmount (
74 struct mntarg *ma,
75 void *data,
76 int flags)
77 {
78 struct hpfs_args args;
79 struct export_args exp;
80 int error;
81
82 error = copyin(data, (caddr_t)&args, sizeof (struct hpfs_args));
83 if (error)
84 return (error);
85 vfs_oexport_conv(&args.export, &exp);
86
87 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
88 ma = mount_arg(ma, "export", &exp, sizeof(exp));
89 ma = mount_argf(ma, "uid", "%d", args.uid);
90 ma = mount_argf(ma, "gid", "%d", args.gid);
91 ma = mount_argf(ma, "mode", "%d", args.mode);
92 if (args.flags & HPFSMNT_TABLES) {
93 ma = mount_arg(ma, "d2u", args.d2u, sizeof args.d2u);
94 ma = mount_arg(ma, "u2d", args.u2d, sizeof args.u2d);
95 }
96
97 error = kernel_mount(ma, flags);
98
99 return (error);
100 }
101
102 static const char *hpfs_opts[] = {
103 "from", "export", "uid", "gid", "mode", "d2u", "u2d", NULL
104 };
105
106 static int
107 hpfs_mount (struct mount *mp)
108 {
109 int err = 0, error;
110 struct vnode *devvp;
111 struct thread *td;
112 struct nameidata ndp;
113 struct export_args export;
114 char *from;
115
116 td = curthread;
117 dprintf(("hpfs_omount():\n"));
118 /*
119 ***
120 * Mounting non-root filesystem or updating a filesystem
121 ***
122 */
123 if (vfs_filteropt(mp->mnt_optnew, hpfs_opts))
124 return (EINVAL);
125
126 from = vfs_getopts(mp->mnt_optnew, "from", &error);
127 if (error)
128 return (error);
129
130 /*
131 * If updating, check whether changing from read-only to
132 * read/write; if there is no device name, that's all we do.
133 */
134 if (mp->mnt_flag & MNT_UPDATE) {
135 dprintf(("hpfs_omount: MNT_UPDATE: "));
136
137 if (from == NULL) {
138 error = vfs_copyopt(mp->mnt_optnew, "export",
139 &export, sizeof export);
140 if (error)
141 return (error);
142 dprintf(("export 0x%x\n",args.export.ex_flags));
143 err = vfs_export(mp, &export);
144 if (err) {
145 printf("hpfs_omount: vfs_export failed %d\n",
146 err);
147 }
148 goto success;
149 } else {
150 dprintf(("name [FAILED]\n"));
151 err = EINVAL;
152 goto success;
153 }
154 dprintf(("\n"));
155 }
156
157 /*
158 * Not an update, or updating the name: look up the name
159 * and verify that it refers to a sensible block device.
160 */
161 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td);
162 err = namei(&ndp);
163 if (err) {
164 /* can't get devvp!*/
165 goto error_1;
166 }
167
168 devvp = ndp.ni_vp;
169
170 if (!vn_isdisk(devvp, &err)) {
171 vput(devvp);
172 return (err);
173 }
174
175 /*
176 ********************
177 * NEW MOUNT
178 ********************
179 */
180
181 /*
182 * Since this is a new mount, we want the names for
183 * the device and the mount point copied in. If an
184 * error occurs, the mountpoint is discarded by the
185 * upper level code. Note that vfs_omount() handles
186 * copying the mountpoint f_mntonname for us, so we
187 * don't have to do it here unless we want to set it
188 * to something other than "path" for some rason.
189 */
190 /* Save "mounted from" info for mount point (NULL pad)*/
191 vfs_mountedfrom(mp, from);
192
193 err = hpfs_mountfs(devvp, mp, td);
194 if (err) {
195 vrele(devvp);
196 goto error_1;
197 }
198
199 goto success;
200
201 error_1: /* no state to back out*/
202 /* XXX: Missing NDFREE(&ndp, ...) */
203
204 success:
205 return( err);
206 }
207
208 /*
209 * Common code for mount and mountroot
210 */
211 int
212 hpfs_mountfs(devvp, mp, td)
213 register struct vnode *devvp;
214 struct mount *mp;
215 struct thread *td;
216 {
217 int error, ronly, v;
218 struct sublock *sup;
219 struct spblock *spp;
220 struct hpfsmount *hpmp;
221 struct buf *bp = NULL;
222 struct vnode *vp;
223 struct cdev *dev = devvp->v_rdev;
224 struct g_consumer *cp;
225 struct bufobj *bo;
226
227 if (mp->mnt_flag & MNT_ROOTFS)
228 return (EOPNOTSUPP);
229 dprintf(("hpfs_mountfs():\n"));
230 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
231 /* XXX: use VOP_ACCESS to check FS perms */
232 DROP_GIANT();
233 g_topology_lock();
234 error = g_vfs_open(devvp, &cp, "hpfs", ronly ? 0 : 1);
235 g_topology_unlock();
236 PICKUP_GIANT();
237 VOP_UNLOCK(devvp, 0);
238 if (error)
239 return (error);
240
241 bo = &devvp->v_bufobj;
242 bo->bo_private = cp;
243 bo->bo_ops = g_vfs_bufops;
244
245 /*
246 * Do actual mount
247 */
248 hpmp = malloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK | M_ZERO);
249
250 hpmp->hpm_cp = cp;
251 hpmp->hpm_bo = bo;
252
253 /* Read in SuperBlock */
254 error = bread(devvp, SUBLOCK, SUSIZE, NOCRED, &bp);
255 if (error)
256 goto failed;
257 bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
258 brelse(bp); bp = NULL;
259
260 /* Read in SpareBlock */
261 error = bread(devvp, SPBLOCK, SPSIZE, NOCRED, &bp);
262 if (error)
263 goto failed;
264 bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
265 brelse(bp); bp = NULL;
266
267 sup = &hpmp->hpm_su;
268 spp = &hpmp->hpm_sp;
269
270 /* Check magic */
271 if (sup->su_magic != SU_MAGIC) {
272 printf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
273 error = EINVAL;
274 goto failed;
275 }
276 if (spp->sp_magic != SP_MAGIC) {
277 printf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
278 error = EINVAL;
279 goto failed;
280 }
281
282 mp->mnt_data = hpmp;
283 hpmp->hpm_devvp = devvp;
284 hpmp->hpm_dev = devvp->v_rdev;
285 hpmp->hpm_mp = mp;
286 if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
287 hpmp->hpm_uid = v;
288 if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
289 hpmp->hpm_gid = v;
290 if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
291 hpmp->hpm_mode = v;
292
293 error = hpfs_bminit(hpmp);
294 if (error)
295 goto failed;
296
297 error = hpfs_cpinit(mp, hpmp);
298 if (error) {
299 hpfs_bmdeinit(hpmp);
300 goto failed;
301 }
302
303 error = hpfs_root(mp, LK_EXCLUSIVE, &vp);
304 if (error) {
305 hpfs_cpdeinit(hpmp);
306 hpfs_bmdeinit(hpmp);
307 goto failed;
308 }
309
310 vput(vp);
311
312 mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
313 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
314 mp->mnt_maxsymlinklen = 0;
315 MNT_ILOCK(mp);
316 mp->mnt_flag |= MNT_LOCAL;
317 MNT_IUNLOCK(mp);
318 return (0);
319
320 failed:
321 if (bp)
322 brelse (bp);
323 mp->mnt_data = NULL;
324 DROP_GIANT();
325 g_topology_lock();
326 g_vfs_close(cp);
327 g_topology_unlock();
328 PICKUP_GIANT();
329 return (error);
330 }
331
332 static int
333 hpfs_unmount(
334 struct mount *mp,
335 int mntflags)
336 {
337 int error, flags;
338 register struct hpfsmount *hpmp = VFSTOHPFS(mp);
339
340 dprintf(("hpfs_unmount():\n"));
341
342 flags = 0;
343 if(mntflags & MNT_FORCE)
344 flags |= FORCECLOSE;
345
346 dprintf(("hpfs_unmount: vflushing...\n"));
347
348 error = vflush(mp, 0, flags, curthread);
349 if (error) {
350 printf("hpfs_unmount: vflush failed: %d\n",error);
351 return (error);
352 }
353
354 vinvalbuf(hpmp->hpm_devvp, V_SAVE, 0, 0);
355 DROP_GIANT();
356 g_topology_lock();
357 g_vfs_close(hpmp->hpm_cp);
358 g_topology_unlock();
359 PICKUP_GIANT();
360 vrele(hpmp->hpm_devvp);
361
362 dprintf(("hpfs_umount: freeing memory...\n"));
363 hpfs_cpdeinit(hpmp);
364 hpfs_bmdeinit(hpmp);
365 mp->mnt_data = NULL;
366 MNT_ILOCK(mp);
367 mp->mnt_flag &= ~MNT_LOCAL;
368 MNT_IUNLOCK(mp);
369 free(hpmp, M_HPFSMNT);
370
371 return (0);
372 }
373
374 static int
375 hpfs_root(
376 struct mount *mp,
377 int flags,
378 struct vnode **vpp)
379 {
380 int error = 0;
381 struct hpfsmount *hpmp = VFSTOHPFS(mp);
382
383 dprintf(("hpfs_root():\n"));
384 error = VFS_VGET(mp, (ino_t)hpmp->hpm_su.su_rootfno, LK_EXCLUSIVE, vpp);
385 if(error) {
386 printf("hpfs_root: VFS_VGET failed: %d\n",error);
387 return (error);
388 }
389
390 return (error);
391 }
392
393 static int
394 hpfs_statfs(
395 struct mount *mp,
396 struct statfs *sbp)
397 {
398 struct hpfsmount *hpmp = VFSTOHPFS(mp);
399
400 dprintf(("hpfs_statfs(): HPFS%d.%d\n",
401 hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
402
403 sbp->f_type = mp->mnt_vfc->vfc_typenum;
404 sbp->f_bsize = DEV_BSIZE;
405 sbp->f_iosize = DEV_BSIZE;
406 sbp->f_blocks = hpmp->hpm_su.su_btotal;
407 sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
408 sbp->f_ffree = 0;
409 sbp->f_files = 0;
410 sbp->f_flags = mp->mnt_flag;
411
412 return (0);
413 }
414
415 /*ARGSUSED*/
416 static int
417 hpfs_fhtovp(
418 struct mount *mp,
419 struct fid *fhp,
420 int flags,
421 struct vnode **vpp)
422 {
423 struct vnode *nvp;
424 struct hpfid *hpfhp = (struct hpfid *)fhp;
425 int error;
426
427 if ((error = VFS_VGET(mp, hpfhp->hpfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
428 *vpp = NULLVP;
429 return (error);
430 }
431 /* XXX as unlink/rmdir/mkdir/creat are not currently possible
432 * with HPFS, we don't need to check anything else for now */
433 *vpp = nvp;
434
435 return (0);
436 }
437
438 static int
439 hpfs_vget(
440 struct mount *mp,
441 ino_t ino,
442 int flags,
443 struct vnode **vpp)
444 {
445 struct hpfsmount *hpmp = VFSTOHPFS(mp);
446 struct vnode *vp;
447 struct hpfsnode *hp;
448 struct buf *bp;
449 int error;
450
451 dprintf(("hpfs_vget(0x%x): ",ino));
452
453 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
454 if (error || *vpp != NULL)
455 return (error);
456
457 *vpp = NULL;
458 hp = NULL;
459 vp = NULL;
460
461 /*
462 * We have to lock node creation for a while,
463 * but then we have to call getnewvnode(),
464 * this may cause hpfs_reclaim() to be called,
465 * this may need to VOP_VGET() parent dir for
466 * update reasons, and if parent is not in
467 * hash, we have to lock node creation...
468 * To solve this, we MALLOC, getnewvnode and init while
469 * not locked (probability of node appearence
470 * at that time is little, and anyway - we'll
471 * check for it).
472 */
473 hp = malloc(sizeof(struct hpfsnode),
474 M_HPFSNO, M_WAITOK);
475
476 error = getnewvnode("hpfs", mp, &hpfs_vnodeops, &vp);
477 if (error) {
478 printf("hpfs_vget: can't get new vnode\n");
479 free(hp, M_HPFSNO);
480 return (error);
481 }
482
483 dprintf(("prenew "));
484
485 vp->v_data = hp;
486
487 if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
488 vp->v_vflag |= VV_ROOT;
489
490
491 mtx_init(&hp->h_interlock, "hpfsnode interlock", NULL, MTX_DEF);
492
493 hp->h_flag = H_INVAL;
494 hp->h_vp = vp;
495 hp->h_hpmp = hpmp;
496 hp->h_no = ino;
497 hp->h_dev = hpmp->hpm_dev;
498 hp->h_uid = hpmp->hpm_uid;
499 hp->h_gid = hpmp->hpm_uid;
500 hp->h_mode = hpmp->hpm_mode;
501 hp->h_devvp = hpmp->hpm_devvp;
502
503 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
504 error = insmntque(vp, mp);
505 if (error != 0) {
506 free(hp, M_HPFSNO);
507 return (error);
508 }
509 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
510 if (error || *vpp != NULL)
511 return (error);
512
513 error = bread(hpmp->hpm_devvp, ino, FNODESIZE, NOCRED, &bp);
514 if (error) {
515 printf("hpfs_vget: can't read ino %d\n",ino);
516 vput(vp);
517 return (error);
518 }
519 bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
520 brelse(bp);
521
522 if (hp->h_fn.fn_magic != FN_MAGIC) {
523 printf("hpfs_vget: MAGIC DOESN'T MATCH\n");
524 vput(vp);
525 return (EINVAL);
526 }
527
528 vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
529 hp->h_flag &= ~H_INVAL;
530
531 *vpp = vp;
532
533 return (0);
534 }
535
536 static struct vfsops hpfs_vfsops = {
537 .vfs_fhtovp = hpfs_fhtovp,
538 .vfs_cmount = hpfs_cmount,
539 .vfs_mount = hpfs_mount,
540 .vfs_root = hpfs_root,
541 .vfs_statfs = hpfs_statfs,
542 .vfs_unmount = hpfs_unmount,
543 .vfs_vget = hpfs_vget,
544 };
545 VFS_SET(hpfs_vfsops, hpfs, 0);
Cache object: 508ad4c24b69b3d66b0bac1cb3310b30
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