Annotation of src/sys/fs/cd9660/cd9660_vfsops.c, Revision 1.8.2.5
1.8.2.5 ! skrll 1: /* $NetBSD: cd9660_vfsops.c,v 1.18 2004/09/13 19:25:48 jdolecek Exp $ */
1.1 jdolecek 2:
3: /*-
4: * Copyright (c) 1994
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley
8: * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
9: * Support code is derived from software contributed to Berkeley
10: * by Atsushi Murai (amurai@spec.co.jp).
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
1.8.2.2 skrll 20: * 3. Neither the name of the University nor the names of its contributors
1.1 jdolecek 21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
37: */
38:
39: #include <sys/cdefs.h>
1.8.2.5 ! skrll 40: __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.18 2004/09/13 19:25:48 jdolecek Exp $");
1.1 jdolecek 41:
42: #if defined(_KERNEL_OPT)
43: #include "opt_compat_netbsd.h"
44: #endif
45:
46: #include <sys/param.h>
1.8.2.2 skrll 47: #include <sys/sysctl.h>
1.1 jdolecek 48: #include <sys/systm.h>
49: #include <sys/namei.h>
50: #include <sys/proc.h>
51: #include <sys/kernel.h>
52: #include <sys/vnode.h>
53: #include <miscfs/specfs/specdev.h>
54: #include <sys/mount.h>
55: #include <sys/buf.h>
56: #include <sys/file.h>
57: #include <sys/disklabel.h>
58: #include <sys/device.h>
59: #include <sys/ioctl.h>
60: #include <sys/cdio.h>
61: #include <sys/errno.h>
62: #include <sys/malloc.h>
63: #include <sys/pool.h>
64: #include <sys/stat.h>
65: #include <sys/conf.h>
1.8.2.5 ! skrll 66: #include <sys/dirent.h>
1.1 jdolecek 67:
68: #include <fs/cd9660/iso.h>
69: #include <fs/cd9660/cd9660_extern.h>
70: #include <fs/cd9660/iso_rrip.h>
71: #include <fs/cd9660/cd9660_node.h>
72: #include <fs/cd9660/cd9660_mount.h>
1.2 thorpej 73:
74: MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
1.1 jdolecek 75:
76: extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc;
77: extern const struct vnodeopv_desc cd9660_specop_opv_desc;
78: extern const struct vnodeopv_desc cd9660_fifoop_opv_desc;
79:
80: const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = {
81: &cd9660_vnodeop_opv_desc,
82: &cd9660_specop_opv_desc,
83: &cd9660_fifoop_opv_desc,
84: NULL,
85: };
86:
87: struct vfsops cd9660_vfsops = {
88: MOUNT_CD9660,
89: cd9660_mount,
90: cd9660_start,
91: cd9660_unmount,
92: cd9660_root,
93: cd9660_quotactl,
1.8.2.2 skrll 94: cd9660_statvfs,
1.1 jdolecek 95: cd9660_sync,
96: cd9660_vget,
97: cd9660_fhtovp,
98: cd9660_vptofh,
99: cd9660_init,
100: cd9660_reinit,
101: cd9660_done,
1.8.2.2 skrll 102: NULL,
1.1 jdolecek 103: cd9660_mountroot,
104: cd9660_check_export,
1.8.2.2 skrll 105: (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
1.1 jdolecek 106: cd9660_vnodeopv_descs,
107: };
108:
109: struct genfs_ops cd9660_genfsops = {
110: genfs_size,
111: };
112:
113: /*
114: * Called by vfs_mountroot when iso is going to be mounted as root.
115: *
116: * Name is updated by mount(8) after booting.
117: */
118: #define ROOTNAME "root_device"
119:
120: static int iso_makemp __P((struct iso_mnt *isomp, struct buf *bp, int *ea_len));
121: static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
1.8.2.5 ! skrll 122: struct proc *p, struct iso_args *argp));
1.1 jdolecek 123:
124: int
125: cd9660_mountroot()
126: {
127: struct mount *mp;
1.8.2.5 ! skrll 128: struct proc *p = curproc; /* XXX */
1.1 jdolecek 129: int error;
130: struct iso_args args;
131:
132: if (root_device->dv_class != DV_DISK)
133: return (ENODEV);
134:
135: /*
136: * Get vnodes for swapdev and rootdev.
137: */
138: if (bdevvp(rootdev, &rootvp))
139: panic("cd9660_mountroot: can't setup rootvp");
140:
141: if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
142: != 0) {
143: vrele(rootvp);
144: return (error);
145: }
146:
147: args.flags = ISOFSMNT_ROOT;
1.8.2.5 ! skrll 148: if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) {
1.1 jdolecek 149: mp->mnt_op->vfs_refcount--;
150: vfs_unbusy(mp);
151: free(mp, M_MOUNT);
152: vrele(rootvp);
153: return (error);
154: }
155: simple_lock(&mountlist_slock);
156: CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
157: simple_unlock(&mountlist_slock);
1.8.2.5 ! skrll 158: (void)cd9660_statvfs(mp, &mp->mnt_stat, p);
1.1 jdolecek 159: vfs_unbusy(mp);
160: return (0);
161: }
162:
163: /*
164: * VFS Operations.
165: *
166: * mount system call
167: */
168: int
1.8.2.5 ! skrll 169: cd9660_mount(mp, path, data, ndp, p)
1.1 jdolecek 170: struct mount *mp;
171: const char *path;
172: void *data;
173: struct nameidata *ndp;
1.8.2.5 ! skrll 174: struct proc *p;
1.1 jdolecek 175: {
176: struct vnode *devvp;
177: struct iso_args args;
178: int error;
179: struct iso_mnt *imp = NULL;
1.8.2.5 ! skrll 180:
1.1 jdolecek 181: if (mp->mnt_flag & MNT_GETARGS) {
182: imp = VFSTOISOFS(mp);
183: if (imp == NULL)
184: return EIO;
185: args.fspec = NULL;
186: args.flags = imp->im_flags;
187: vfs_showexport(mp, &args.export, &imp->im_export);
188: return copyout(&args, data, sizeof(args));
189: }
1.3 dsl 190: error = copyin(data, &args, sizeof (struct iso_args));
1.1 jdolecek 191: if (error)
192: return (error);
193:
194: if ((mp->mnt_flag & MNT_RDONLY) == 0)
195: return (EROFS);
196:
197: /*
198: * If updating, check whether changing from read-only to
199: * read/write; if there is no device name, that's all we do.
200: */
201: if (mp->mnt_flag & MNT_UPDATE) {
202: imp = VFSTOISOFS(mp);
203: if (args.fspec == 0)
204: return (vfs_export(mp, &imp->im_export, &args.export));
205: }
206: /*
207: * Not an update, or updating the name: look up the name
208: * and verify that it refers to a sensible block device.
209: */
1.8.2.5 ! skrll 210: NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
1.1 jdolecek 211: if ((error = namei(ndp)) != 0)
212: return (error);
213: devvp = ndp->ni_vp;
214:
215: if (devvp->v_type != VBLK) {
216: vrele(devvp);
217: return ENOTBLK;
218: }
219: if (bdevsw_lookup(devvp->v_rdev) == NULL) {
220: vrele(devvp);
221: return ENXIO;
222: }
223: /*
224: * If mount by non-root, then verify that user has necessary
225: * permissions on the device.
226: */
227: if (p->p_ucred->cr_uid != 0) {
228: vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1.8.2.5 ! skrll 229: error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p);
1.1 jdolecek 230: VOP_UNLOCK(devvp, 0);
231: if (error) {
232: vrele(devvp);
233: return (error);
234: }
235: }
236: if ((mp->mnt_flag & MNT_UPDATE) == 0)
1.8.2.5 ! skrll 237: error = iso_mountfs(devvp, mp, p, &args);
1.1 jdolecek 238: else {
239: if (devvp != imp->im_devvp)
240: error = EINVAL; /* needs translation */
241: else
242: vrele(devvp);
243: }
244: if (error) {
245: vrele(devvp);
246: return error;
247: }
248: imp = VFSTOISOFS(mp);
1.8.2.2 skrll 249: return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE,
1.8.2.5 ! skrll 250: mp, p);
1.1 jdolecek 251: }
252:
253: /*
254: * Make a mount point from a volume descriptor
255: */
256: static int
257: iso_makemp(isomp, bp, ea_len)
258: struct iso_mnt *isomp;
259: struct buf *bp;
260: int *ea_len;
261: {
262: struct iso_primary_descriptor *pri;
263: int logical_block_size;
264: struct iso_directory_record *rootp;
265:
266: pri = (struct iso_primary_descriptor *)bp->b_data;
267:
268: logical_block_size = isonum_723 (pri->logical_block_size);
269:
270: if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
271: || (logical_block_size & (logical_block_size - 1)) != 0)
272: return -1;
273:
274: rootp = (struct iso_directory_record *)pri->root_directory_record;
275:
276: isomp->logical_block_size = logical_block_size;
277: isomp->volume_space_size = isonum_733 (pri->volume_space_size);
278: memcpy(isomp->root, rootp, sizeof(isomp->root));
279: isomp->root_extent = isonum_733 (rootp->extent);
280: isomp->root_size = isonum_733 (rootp->size);
281: isomp->im_joliet_level = 0;
282:
283: isomp->im_bmask = logical_block_size - 1;
284: isomp->im_bshift = 0;
285: while ((1 << isomp->im_bshift) < isomp->logical_block_size)
286: isomp->im_bshift++;
287:
288: if (ea_len != NULL)
289: *ea_len = isonum_711(rootp->ext_attr_length);
290:
291: return 0;
292: }
293:
294: /*
295: * Common code for mount and mountroot
296: */
297: static int
1.8.2.5 ! skrll 298: iso_mountfs(devvp, mp, p, argp)
1.1 jdolecek 299: struct vnode *devvp;
300: struct mount *mp;
1.8.2.5 ! skrll 301: struct proc *p;
1.1 jdolecek 302: struct iso_args *argp;
303: {
304: struct iso_mnt *isomp = (struct iso_mnt *)0;
305: struct buf *bp = NULL, *pribp = NULL, *supbp = NULL;
306: dev_t dev = devvp->v_rdev;
307: int error = EINVAL;
308: int needclose = 0;
309: int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
310: int iso_bsize;
311: int iso_blknum;
312: int joliet_level;
313: struct iso_volume_descriptor *vdp;
314: struct iso_supplementary_descriptor *sup;
315: int sess = 0;
316: int ext_attr_length;
317: struct disklabel label;
318:
319: if (!ronly)
320: return EROFS;
321:
322: /*
323: * Disallow multiple mounts of the same device.
324: * Disallow mounting of a device that is currently in use
325: * (except for root, which might share swap device for miniroot).
326: * Flush out any old buffers remaining from a previous use.
327: */
328: if ((error = vfs_mountedon(devvp)) != 0)
329: return error;
330: if (vcount(devvp) > 1 && devvp != rootvp)
331: return EBUSY;
1.8.2.5 ! skrll 332: if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
1.1 jdolecek 333: return (error);
334:
1.8.2.5 ! skrll 335: error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
1.1 jdolecek 336: if (error)
337: return error;
338: needclose = 1;
339:
340: /* This is the "logical sector size". The standard says this
341: * should be 2048 or the physical sector size on the device,
342: * whichever is greater. For now, we'll just use a constant.
343: */
344: iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
345:
1.8.2.5 ! skrll 346: error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p);
1.1 jdolecek 347: if (!error &&
348: label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) {
349: /* XXX more sanity checks? */
350: sess = label.d_partitions[DISKPART(dev)].p_cdsession;
351: } else {
352: /* fallback to old method */
1.8.2.5 ! skrll 353: error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p);
1.1 jdolecek 354: if (error)
355: sess = 0; /* never mind */
356: }
1.4 christos 357: #ifdef ISO_DEBUG
1.1 jdolecek 358: printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess);
359: #endif
360:
361: for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
362: if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize),
363: iso_bsize, NOCRED, &bp)) != 0)
364: goto out;
365:
366: vdp = (struct iso_volume_descriptor *)bp->b_data;
367: if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) {
368: error = EINVAL;
369: goto out;
370: }
371:
372: switch (isonum_711(vdp->type)) {
373: case ISO_VD_PRIMARY:
374: if (pribp == NULL) {
375: pribp = bp;
376: bp = NULL;
377: }
378: break;
379:
380: case ISO_VD_SUPPLEMENTARY:
381: if (supbp == NULL) {
382: supbp = bp;
383: bp = NULL;
384: }
385: break;
386:
387: default:
388: break;
389: }
390:
391: if (isonum_711 (vdp->type) == ISO_VD_END) {
392: brelse(bp);
393: bp = NULL;
394: break;
395: }
396:
397: if (bp != NULL) {
398: brelse(bp);
399: bp = NULL;
400: }
401: }
402:
403: if (pribp == NULL) {
404: error = EINVAL;
405: goto out;
406: }
407:
408: isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
1.3 dsl 409: memset(isomp, 0, sizeof *isomp);
1.1 jdolecek 410: if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) {
411: error = EINVAL;
412: goto out;
413: }
414:
415: isomp->volume_space_size += sess;
416:
417: pribp->b_flags |= B_AGE;
418: brelse(pribp);
419: pribp = NULL;
420:
421: mp->mnt_data = isomp;
1.8.2.2 skrll 422: mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
423: mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660);
424: mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
1.8.2.5 ! skrll 425: mp->mnt_stat.f_namemax = MAXNAMLEN;
1.1 jdolecek 426: mp->mnt_flag |= MNT_LOCAL;
427: mp->mnt_dev_bshift = iso_bsize;
428: mp->mnt_fs_bshift = isomp->im_bshift;
429: isomp->im_mountp = mp;
430: isomp->im_dev = dev;
431: isomp->im_devvp = devvp;
432:
433: devvp->v_specmountpoint = mp;
434:
435: /* Check the Rock Ridge Extension support */
436: if (!(argp->flags & ISOFSMNT_NORRIP)) {
437: struct iso_directory_record *rootp;
438:
439: if ((error = bread(isomp->im_devvp,
440: (isomp->root_extent + ext_attr_length) <<
441: (isomp->im_bshift - DEV_BSHIFT),
442: isomp->logical_block_size, NOCRED,
443: &bp)) != 0)
444: goto out;
445:
446: rootp = (struct iso_directory_record *)bp->b_data;
447:
448: if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
449: argp->flags |= ISOFSMNT_NORRIP;
450: } else {
451: argp->flags &= ~ISOFSMNT_GENS;
452: }
453:
454: /*
455: * The contents are valid,
456: * but they will get reread as part of another vnode, so...
457: */
458: bp->b_flags |= B_AGE;
459: brelse(bp);
460: bp = NULL;
461: }
462: isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
463: ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS);
464:
465: if (isomp->im_flags & ISOFSMNT_GENS)
466: isomp->iso_ftype = ISO_FTYPE_9660;
467: else if (isomp->im_flags & ISOFSMNT_NORRIP) {
468: isomp->iso_ftype = ISO_FTYPE_DEFAULT;
469: if (argp->flags & ISOFSMNT_NOCASETRANS)
470: isomp->im_flags |= ISOFSMNT_NOCASETRANS;
471: } else
472: isomp->iso_ftype = ISO_FTYPE_RRIP;
473:
474: /* Check the Joliet Extension support */
475: if ((argp->flags & ISOFSMNT_NORRIP) != 0 &&
476: (argp->flags & ISOFSMNT_NOJOLIET) == 0 &&
477: supbp != NULL) {
478: joliet_level = 0;
479: sup = (struct iso_supplementary_descriptor *)supbp->b_data;
480:
481: if ((isonum_711(sup->flags) & 1) == 0) {
482: if (memcmp(sup->escape, "%/@", 3) == 0)
483: joliet_level = 1;
484: if (memcmp(sup->escape, "%/C", 3) == 0)
485: joliet_level = 2;
486: if (memcmp(sup->escape, "%/E", 3) == 0)
487: joliet_level = 3;
488: }
489: if (joliet_level != 0) {
490: if (iso_makemp(isomp, supbp, NULL) == -1) {
491: error = EINVAL;
492: goto out;
493: }
494: isomp->im_joliet_level = joliet_level;
495: }
496: }
497:
498: if (supbp != NULL) {
499: brelse(supbp);
500: supbp = NULL;
501: }
502:
503: return 0;
504: out:
505: if (bp)
506: brelse(bp);
507: if (pribp)
508: brelse(pribp);
509: if (supbp)
510: brelse(supbp);
511: if (needclose) {
512: vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1.8.2.5 ! skrll 513: (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
1.1 jdolecek 514: VOP_UNLOCK(devvp, 0);
515: }
516: if (isomp) {
1.3 dsl 517: free(isomp, M_ISOFSMNT);
1.1 jdolecek 518: mp->mnt_data = NULL;
519: }
520: return error;
521: }
522:
523: /*
524: * Make a filesystem operational.
525: * Nothing to do at the moment.
526: */
527: /* ARGSUSED */
528: int
1.8.2.5 ! skrll 529: cd9660_start(mp, flags, p)
1.1 jdolecek 530: struct mount *mp;
531: int flags;
1.8.2.5 ! skrll 532: struct proc *p;
1.1 jdolecek 533: {
534: return 0;
535: }
536:
537: /*
538: * unmount system call
539: */
540: int
1.8.2.5 ! skrll 541: cd9660_unmount(mp, mntflags, p)
1.1 jdolecek 542: struct mount *mp;
543: int mntflags;
1.8.2.5 ! skrll 544: struct proc *p;
1.1 jdolecek 545: {
546: struct iso_mnt *isomp;
547: int error, flags = 0;
548:
549: if (mntflags & MNT_FORCE)
550: flags |= FORCECLOSE;
551: #if 0
552: mntflushbuf(mp, 0);
553: if (mntinvalbuf(mp))
554: return EBUSY;
555: #endif
556: if ((error = vflush(mp, NULLVP, flags)) != 0)
557: return (error);
558:
559: isomp = VFSTOISOFS(mp);
560:
561: #ifdef ISODEVMAP
562: if (isomp->iso_ftype == ISO_FTYPE_RRIP)
563: iso_dunmap(isomp->im_dev);
564: #endif
565:
566: if (isomp->im_devvp->v_type != VBAD)
567: isomp->im_devvp->v_specmountpoint = NULL;
568:
569: vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
1.8.2.5 ! skrll 570: error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p);
1.1 jdolecek 571: vput(isomp->im_devvp);
1.3 dsl 572: free(isomp, M_ISOFSMNT);
1.1 jdolecek 573: mp->mnt_data = NULL;
574: mp->mnt_flag &= ~MNT_LOCAL;
575: return (error);
576: }
577:
578: /*
579: * Return root of a filesystem
580: */
581: int
1.8.2.3 skrll 582: cd9660_root(mp, vpp)
1.1 jdolecek 583: struct mount *mp;
584: struct vnode **vpp;
585: {
586: struct iso_mnt *imp = VFSTOISOFS(mp);
587: struct iso_directory_record *dp =
588: (struct iso_directory_record *)imp->root;
589: ino_t ino = isodirino(dp, imp);
590:
591: /*
592: * With RRIP we must use the `.' entry of the root directory.
593: * Simply tell vget, that it's a relocated directory.
594: */
595: return (cd9660_vget_internal(mp, ino, vpp,
1.8.2.3 skrll 596: imp->iso_ftype == ISO_FTYPE_RRIP, dp));
1.1 jdolecek 597: }
598:
599: /*
600: * Do operations associated with quotas, not supported
601: */
602: /* ARGSUSED */
603: int
1.8.2.5 ! skrll 604: cd9660_quotactl(mp, cmd, uid, arg, p)
1.1 jdolecek 605: struct mount *mp;
606: int cmd;
607: uid_t uid;
1.8.2.2 skrll 608: void *arg;
1.8.2.5 ! skrll 609: struct proc *p;
1.1 jdolecek 610: {
611:
612: return (EOPNOTSUPP);
613: }
614:
615: /*
616: * Get file system statistics.
617: */
618: int
1.8.2.5 ! skrll 619: cd9660_statvfs(mp, sbp, p)
1.1 jdolecek 620: struct mount *mp;
1.8.2.2 skrll 621: struct statvfs *sbp;
1.8.2.5 ! skrll 622: struct proc *p;
1.1 jdolecek 623: {
624: struct iso_mnt *isomp;
625:
626: isomp = VFSTOISOFS(mp);
627:
628: sbp->f_bsize = isomp->logical_block_size;
1.8.2.2 skrll 629: sbp->f_frsize = sbp->f_bsize;
1.1 jdolecek 630: sbp->f_iosize = sbp->f_bsize; /* XXX */
631: sbp->f_blocks = isomp->volume_space_size;
632: sbp->f_bfree = 0; /* total free blocks */
633: sbp->f_bavail = 0; /* blocks free for non superuser */
1.8.2.2 skrll 634: sbp->f_bresvd = 0; /* total reserved blocks */
1.1 jdolecek 635: sbp->f_files = 0; /* total files */
636: sbp->f_ffree = 0; /* free file nodes */
1.8.2.2 skrll 637: sbp->f_favail = 0; /* free file nodes */
638: sbp->f_fresvd = 0; /* reserved file nodes */
639: copy_statvfs_info(sbp, mp);
1.1 jdolecek 640: /* Use the first spare for flags: */
641: sbp->f_spare[0] = isomp->im_flags;
642: return 0;
643: }
644:
645: /* ARGSUSED */
646: int
1.8.2.5 ! skrll 647: cd9660_sync(mp, waitfor, cred, p)
1.1 jdolecek 648: struct mount *mp;
649: int waitfor;
650: struct ucred *cred;
1.8.2.5 ! skrll 651: struct proc *p;
1.1 jdolecek 652: {
653: return (0);
654: }
655:
656: /*
657: * File handle to vnode
658: *
659: * Have to be really careful about stale file handles:
660: * - check that the inode number is in range
661: * - call iget() to get the locked inode
662: * - check for an unallocated inode (i_mode == 0)
663: * - check that the generation number matches
664: */
665:
666: struct ifid {
667: ushort ifid_len;
668: ushort ifid_pad;
669: int ifid_ino;
670: long ifid_start;
671: };
672:
673: /* ARGSUSED */
674: int
1.8.2.3 skrll 675: cd9660_fhtovp(mp, fhp, vpp)
1.1 jdolecek 676: struct mount *mp;
677: struct fid *fhp;
678: struct vnode **vpp;
679: {
680: struct ifid *ifhp = (struct ifid *)fhp;
681: struct iso_node *ip;
682: struct vnode *nvp;
683: int error;
684:
685: #ifdef ISOFS_DBG
686: printf("fhtovp: ino %d, start %ld\n",
687: ifhp->ifid_ino, ifhp->ifid_start);
688: #endif
689:
1.8.2.3 skrll 690: if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
1.1 jdolecek 691: *vpp = NULLVP;
692: return (error);
693: }
694: ip = VTOI(nvp);
695: if (ip->inode.iso_mode == 0) {
696: vput(nvp);
697: *vpp = NULLVP;
698: return (ESTALE);
699: }
700: *vpp = nvp;
701: return (0);
702: }
703:
704: /* ARGSUSED */
705: int
706: cd9660_check_export(mp, nam, exflagsp, credanonp)
707: struct mount *mp;
708: struct mbuf *nam;
709: int *exflagsp;
710: struct ucred **credanonp;
711: {
712: struct netcred *np;
713: struct iso_mnt *imp = VFSTOISOFS(mp);
714:
715: #ifdef ISOFS_DBG
716: printf("check_export: ino %d, start %ld\n",
717: ifhp->ifid_ino, ifhp->ifid_start);
718: #endif
719:
720: /*
721: * Get the export permission structure for this <mp, client> tuple.
722: */
723: np = vfs_export_lookup(mp, &imp->im_export, nam);
724: if (np == NULL)
725: return (EACCES);
726:
727: *exflagsp = np->netc_exflags;
728: *credanonp = &np->netc_anon;
729: return (0);
730: }
731:
732: int
1.8.2.3 skrll 733: cd9660_vget(mp, ino, vpp)
1.1 jdolecek 734: struct mount *mp;
735: ino_t ino;
736: struct vnode **vpp;
737: {
738:
739: /*
740: * XXXX
741: * It would be nice if we didn't always set the `relocated' flag
742: * and force the extra read, but I don't want to think about fixing
743: * that right now.
744: */
745: return (cd9660_vget_internal(mp, ino, vpp,
746: #if 0
747: VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
748: #else
749: 0,
750: #endif
1.8.2.3 skrll 751: NULL));
1.1 jdolecek 752: }
753:
754: int
1.8.2.3 skrll 755: cd9660_vget_internal(mp, ino, vpp, relocated, isodir)
1.1 jdolecek 756: struct mount *mp;
757: ino_t ino;
758: struct vnode **vpp;
759: int relocated;
760: struct iso_directory_record *isodir;
761: {
762: struct iso_mnt *imp;
763: struct iso_node *ip;
764: #ifdef ISODEVMAP
765: struct iso_dnode *dp;
766: #endif
767: struct buf *bp;
768: struct vnode *vp, *nvp;
769: dev_t dev;
770: int error;
771:
772: imp = VFSTOISOFS(mp);
773: dev = imp->im_dev;
1.8.2.3 skrll 774: if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
1.1 jdolecek 775: return (0);
776:
777: /* Allocate a new vnode/iso_node. */
778: if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
779: *vpp = NULLVP;
780: return (error);
781: }
782: ip = pool_get(&cd9660_node_pool, PR_WAITOK);
1.3 dsl 783: memset(ip, 0, sizeof(struct iso_node));
1.1 jdolecek 784: vp->v_data = ip;
785: ip->i_vnode = vp;
786: ip->i_dev = dev;
787: ip->i_number = ino;
788:
789: /*
790: * Put it onto its hash chain and lock it so that other requests for
791: * this inode will block if they arrive while we are sleeping waiting
792: * for old data structures to be purged or for the contents of the
793: * disk portion of this inode to be read.
794: */
795: cd9660_ihashins(ip);
796:
797: if (isodir == 0) {
798: int lbn, off;
799:
800: lbn = lblkno(imp, ino);
801: if (lbn >= imp->volume_space_size) {
802: vput(vp);
803: printf("fhtovp: lbn exceed volume space %d\n", lbn);
804: return (ESTALE);
805: }
806:
807: off = blkoff(imp, ino);
808: if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
809: vput(vp);
810: printf("fhtovp: crosses block boundary %d\n",
811: off + ISO_DIRECTORY_RECORD_SIZE);
812: return (ESTALE);
813: }
814:
815: error = bread(imp->im_devvp,
816: lbn << (imp->im_bshift - DEV_BSHIFT),
817: imp->logical_block_size, NOCRED, &bp);
818: if (error) {
819: vput(vp);
820: brelse(bp);
821: printf("fhtovp: bread error %d\n",error);
822: return (error);
823: }
824: isodir = (struct iso_directory_record *)(bp->b_data + off);
825:
826: if (off + isonum_711(isodir->length) >
827: imp->logical_block_size) {
828: vput(vp);
829: if (bp != 0)
830: brelse(bp);
831: printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
832: off +isonum_711(isodir->length), off,
833: isonum_711(isodir->length));
834: return (ESTALE);
835: }
836:
837: #if 0
838: if (isonum_733(isodir->extent) +
839: isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
840: if (bp != 0)
841: brelse(bp);
842: printf("fhtovp: file start miss %d vs %d\n",
843: isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
844: ifhp->ifid_start);
845: return (ESTALE);
846: }
847: #endif
848: } else
849: bp = 0;
850:
851: ip->i_mnt = imp;
852: ip->i_devvp = imp->im_devvp;
853: VREF(ip->i_devvp);
854:
855: if (relocated) {
856: /*
857: * On relocated directories we must
858: * read the `.' entry out of a dir.
859: */
860: ip->iso_start = ino >> imp->im_bshift;
861: if (bp != 0)
862: brelse(bp);
863: if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) {
864: vput(vp);
865: return (error);
866: }
867: isodir = (struct iso_directory_record *)bp->b_data;
868: }
869:
870: ip->iso_extent = isonum_733(isodir->extent);
871: ip->i_size = isonum_733(isodir->size);
872: ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
873:
874: /*
875: * Setup time stamp, attribute
876: */
877: vp->v_type = VNON;
878: switch (imp->iso_ftype) {
879: default: /* ISO_FTYPE_9660 */
880: {
881: struct buf *bp2;
882: int off;
883: if ((imp->im_flags & ISOFSMNT_EXTATT)
884: && (off = isonum_711(isodir->ext_attr_length)))
885: VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL,
886: &bp2);
887: else
888: bp2 = NULL;
889: cd9660_defattr(isodir, ip, bp2);
890: cd9660_deftstamp(isodir, ip, bp2);
891: if (bp2)
892: brelse(bp2);
893: break;
894: }
895: case ISO_FTYPE_RRIP:
896: cd9660_rrip_analyze(isodir, ip, imp);
897: break;
898: }
899:
900: if (bp != 0)
901: brelse(bp);
902:
903: /*
904: * Initialize the associated vnode
905: */
906: switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
907: case VFIFO:
908: vp->v_op = cd9660_fifoop_p;
909: break;
910: case VCHR:
911: case VBLK:
912: /*
913: * if device, look at device number table for translation
914: */
915: #ifdef ISODEVMAP
916: if ((dp = iso_dmap(dev, ino, 0)) != NULL)
917: ip->inode.iso_rdev = dp->d_dev;
918: #endif
919: vp->v_op = cd9660_specop_p;
920: if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) {
921: /*
922: * Discard unneeded vnode, but save its iso_node.
923: * Note that the lock is carried over in the iso_node
924: * to the replacement vnode.
925: */
926: nvp->v_data = vp->v_data;
927: vp->v_data = NULL;
928: VOP_UNLOCK(vp, 0);
929: vp->v_op = spec_vnodeop_p;
930: vrele(vp);
931: vgone(vp);
932: lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock);
933: /*
934: * Reinitialize aliased inode.
935: */
936: vp = nvp;
937: ip->i_vnode = vp;
938: }
939: break;
940: case VLNK:
941: case VNON:
942: case VSOCK:
943: case VDIR:
944: case VBAD:
945: break;
946: case VREG:
947: uvm_vnp_setsize(vp, ip->i_size);
948: break;
949: }
950:
951: if (ip->iso_extent == imp->root_extent)
952: vp->v_flag |= VROOT;
953:
954: /*
955: * XXX need generation number?
956: */
957:
958: genfs_node_init(vp, &cd9660_genfsops);
959: *vpp = vp;
960: return (0);
961: }
962:
963: /*
964: * Vnode pointer to File handle
965: */
966: /* ARGSUSED */
967: int
968: cd9660_vptofh(vp, fhp)
969: struct vnode *vp;
970: struct fid *fhp;
971: {
972: struct iso_node *ip = VTOI(vp);
973: struct ifid *ifhp;
974:
975: ifhp = (struct ifid *)fhp;
976: ifhp->ifid_len = sizeof(struct ifid);
977:
978: ifhp->ifid_ino = ip->i_number;
979: ifhp->ifid_start = ip->iso_start;
980:
981: #ifdef ISOFS_DBG
982: printf("vptofh: ino %d, start %ld\n",
983: ifhp->ifid_ino,ifhp->ifid_start);
984: #endif
985: return 0;
986: }
987:
1.8.2.2 skrll 988: SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup")
1.1 jdolecek 989: {
1.8.2.2 skrll 990:
991: sysctl_createv(clog, 0, NULL, NULL,
992: CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL,
993: NULL, 0, NULL, 0,
994: CTL_VFS, CTL_EOL);
995: sysctl_createv(clog, 0, NULL, NULL,
996: CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660",
997: SYSCTL_DESCR("ISO-9660 file system"),
998: NULL, 0, NULL, 0,
999: CTL_VFS, 14, CTL_EOL);
1000: /*
1001: * XXX the "14" above could be dynamic, thereby eliminating
1002: * one more instance of the "number to vfs" mapping problem,
1003: * but "14" is the order as taken from sys/mount.h
1004: */
1.1 jdolecek 1005: }
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