Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/hsfs/hsfs_vfsops.c @ 4399:d5f991296d2a
backout 4294956/6489267/6490818: causes 6566056
author | dm120769 |
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date | Wed, 06 Jun 2007 15:56:51 -0700 |
parents | 293a83bcb332 |
children | 34d9e5474e96 |
rev | line source |
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0 | 1 /* |
2 * CDDL HEADER START | |
3 * | |
4 * The contents of this file are subject to the terms of the | |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
0 | 7 * |
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 * or http://www.opensolaris.org/os/licensing. | |
10 * See the License for the specific language governing permissions | |
11 * and limitations under the License. | |
12 * | |
13 * When distributing Covered Code, include this CDDL HEADER in each | |
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 * If applicable, add the following below this CDDL HEADER, with the | |
16 * fields enclosed by brackets "[]" replaced with your own identifying | |
17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 * | |
19 * CDDL HEADER END | |
20 */ | |
21 /* | |
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22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
0 | 23 * Use is subject to license terms. |
24 */ | |
25 | |
26 #pragma ident "%Z%%M% %I% %E% SMI" | |
27 | |
28 /* | |
29 * VFS operations for High Sierra filesystem | |
30 */ | |
31 | |
32 #include <sys/types.h> | |
33 #include <sys/isa_defs.h> | |
34 #include <sys/t_lock.h> | |
35 #include <sys/param.h> | |
36 #include <sys/systm.h> | |
37 #include <sys/sysmacros.h> | |
38 #include <sys/kmem.h> | |
39 #include <sys/signal.h> | |
40 #include <sys/user.h> | |
41 #include <sys/proc.h> | |
42 #include <sys/disp.h> | |
43 #include <sys/buf.h> | |
44 #include <sys/pathname.h> | |
45 #include <sys/vfs.h> | |
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46 #include <sys/vfs_opreg.h> |
0 | 47 #include <sys/vnode.h> |
48 #include <sys/file.h> | |
49 #include <sys/uio.h> | |
50 #include <sys/conf.h> | |
51 #include <sys/policy.h> | |
52 | |
53 #include <vm/page.h> | |
54 | |
55 #include <sys/fs/snode.h> | |
56 #include <sys/fs/hsfs_spec.h> | |
57 #include <sys/fs/hsfs_isospec.h> | |
58 #include <sys/fs/hsfs_node.h> | |
59 #include <sys/fs/hsfs_impl.h> | |
60 #include <sys/fs/hsfs_susp.h> | |
61 #include <sys/fs/hsfs_rrip.h> | |
62 | |
63 #include <sys/statvfs.h> | |
64 #include <sys/mount.h> | |
65 #include <sys/mntent.h> | |
66 #include <sys/swap.h> | |
67 #include <sys/errno.h> | |
68 #include <sys/debug.h> | |
69 #include "fs/fs_subr.h" | |
70 #include <sys/cmn_err.h> | |
71 #include <sys/bootconf.h> | |
72 | |
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73 #include <sys/sdt.h> |
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74 |
0 | 75 /* |
76 * These are needed for the CDROMREADOFFSET Code | |
77 */ | |
78 #include <sys/cdio.h> | |
79 #include <sys/sunddi.h> | |
80 | |
81 #define HSFS_CLKSET | |
82 | |
83 #include <sys/modctl.h> | |
84 | |
85 /* | |
86 * Options for mount. | |
87 */ | |
88 #define HOPT_GLOBAL MNTOPT_GLOBAL | |
89 #define HOPT_NOGLOBAL MNTOPT_NOGLOBAL | |
90 #define HOPT_MAPLCASE "maplcase" | |
91 #define HOPT_NOMAPLCASE "nomaplcase" | |
92 #define HOPT_NOTRAILDOT "notraildot" | |
93 #define HOPT_TRAILDOT "traildot" | |
94 #define HOPT_NRR "nrr" | |
95 #define HOPT_RR "rr" | |
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96 #define HOPT_JOLIET "joliet" |
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97 #define HOPT_NOJOLIET "nojoliet" |
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98 #define HOPT_JOLIETLONG "jolietlong" |
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99 #define HOPT_VERS2 "vers2" |
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100 #define HOPT_NOVERS2 "novers2" |
0 | 101 #define HOPT_RO MNTOPT_RO |
102 | |
103 static char *global_cancel[] = { HOPT_NOGLOBAL, NULL }; | |
104 static char *noglobal_cancel[] = { HOPT_GLOBAL, NULL }; | |
105 static char *mapl_cancel[] = { HOPT_NOMAPLCASE, NULL }; | |
106 static char *nomapl_cancel[] = { HOPT_MAPLCASE, NULL }; | |
107 static char *ro_cancel[] = { MNTOPT_RW, NULL }; | |
108 static char *rr_cancel[] = { HOPT_NRR, NULL }; | |
109 static char *nrr_cancel[] = { HOPT_RR, NULL }; | |
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110 static char *joliet_cancel[] = { HOPT_NOJOLIET, NULL }; |
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111 static char *nojoliet_cancel[] = { HOPT_JOLIET, NULL }; |
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112 static char *vers2_cancel[] = { HOPT_NOVERS2, NULL }; |
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113 static char *novers2_cancel[] = { HOPT_VERS2, NULL }; |
0 | 114 static char *trail_cancel[] = { HOPT_NOTRAILDOT, NULL }; |
115 static char *notrail_cancel[] = { HOPT_TRAILDOT, NULL }; | |
116 | |
117 static mntopt_t hsfs_options[] = { | |
118 { HOPT_GLOBAL, global_cancel, NULL, 0, NULL }, | |
119 { HOPT_NOGLOBAL, noglobal_cancel, NULL, MO_DEFAULT, NULL }, | |
120 { HOPT_MAPLCASE, mapl_cancel, NULL, MO_DEFAULT, NULL }, | |
121 { HOPT_NOMAPLCASE, nomapl_cancel, NULL, 0, NULL }, | |
122 { HOPT_RO, ro_cancel, NULL, MO_DEFAULT, NULL }, | |
123 { HOPT_RR, rr_cancel, NULL, MO_DEFAULT, NULL }, | |
124 { HOPT_NRR, nrr_cancel, NULL, 0, NULL }, | |
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125 { HOPT_JOLIET, joliet_cancel, NULL, 0, NULL }, |
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126 { HOPT_NOJOLIET, nojoliet_cancel, NULL, 0, NULL }, |
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127 { HOPT_JOLIETLONG, NULL, NULL, 0, NULL }, |
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128 { HOPT_VERS2, vers2_cancel, NULL, 0, NULL }, |
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129 { HOPT_NOVERS2, novers2_cancel, NULL, 0, NULL }, |
0 | 130 { HOPT_TRAILDOT, trail_cancel, NULL, MO_DEFAULT, NULL }, |
131 { HOPT_NOTRAILDOT, notrail_cancel, NULL, 0, NULL }, | |
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132 { "sector", NULL, "0", MO_HASVALUE, NULL}, |
0 | 133 }; |
134 | |
135 static mntopts_t hsfs_proto_opttbl = { | |
136 sizeof (hsfs_options) / sizeof (mntopt_t), | |
137 hsfs_options | |
138 }; | |
139 | |
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140 static int hsfsfstype; |
0 | 141 static int hsfsinit(int, char *); |
142 | |
143 static vfsdef_t vfw = { | |
144 VFSDEF_VERSION, | |
145 "hsfs", | |
146 hsfsinit, | |
1488 | 147 VSW_HASPROTO|VSW_STATS, /* We don't suppport remounting */ |
0 | 148 &hsfs_proto_opttbl |
149 }; | |
150 | |
151 static struct modlfs modlfs = { | |
152 &mod_fsops, "filesystem for HSFS", &vfw | |
153 }; | |
154 | |
155 static struct modlinkage modlinkage = { | |
156 MODREV_1, (void *)&modlfs, NULL | |
157 }; | |
158 | |
159 char _depends_on[] = "fs/specfs"; | |
160 | |
161 int | |
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162 _init(void) |
0 | 163 { |
164 return (mod_install(&modlinkage)); | |
165 } | |
166 | |
167 int | |
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168 _fini(void) |
0 | 169 { |
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170 int error; |
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171 |
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172 error = mod_remove(&modlinkage); |
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173 |
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174 DTRACE_PROBE1(mod_remove, int, error); |
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175 |
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176 if (error) |
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177 return (error); |
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178 |
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179 mutex_destroy(&hs_mounttab_lock); |
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180 |
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181 /* |
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182 * Tear down the operations vectors |
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183 */ |
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184 (void) vfs_freevfsops_by_type(hsfsfstype); |
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185 vn_freevnodeops(hsfs_vnodeops); |
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186 |
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187 hs_fini_hsnode_cache(); |
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188 return (0); |
0 | 189 } |
190 | |
191 int | |
192 _info(struct modinfo *modinfop) | |
193 { | |
194 return (mod_info(&modlinkage, modinfop)); | |
195 } | |
196 | |
197 #define BDEVFLAG(dev) ((devopsp[getmajor(dev)])->devo_cb_ops->cb_flag) | |
198 | |
199 kmutex_t hs_mounttab_lock; | |
200 struct hsfs *hs_mounttab = NULL; | |
201 | |
202 /* default mode, uid, gid */ | |
203 mode_t hsfs_default_mode = 0555; | |
204 uid_t hsfs_default_uid = 0; | |
205 gid_t hsfs_default_gid = 3; | |
206 | |
207 static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, | |
208 struct mounta *uap, struct cred *cr); | |
209 static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); | |
210 static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); | |
211 static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); | |
212 static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); | |
213 static int hsfs_mountroot(struct vfs *, enum whymountroot); | |
214 | |
215 static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, | |
216 mode_t mode, int flags, struct cred *cr, int isroot); | |
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217 static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); |
0 | 218 static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, |
219 struct hs_volume *hvp); | |
220 static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, | |
221 struct hs_volume *hvp); | |
222 static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, | |
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223 struct hs_volume *hvp, |
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224 struct hs_volume *svp, |
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225 struct hs_volume *jvp); |
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226 static int hs_joliet_level(uchar_t *volp); |
0 | 227 static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, |
228 struct hs_volume *hvp); | |
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229 static void hs_copylabel(struct hs_volume *, unsigned char *, int); |
0 | 230 static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, |
231 mode_t *mode, cred_t *cr); | |
232 static int hs_findvoldesc(dev_t rdev, int desc_sec); | |
233 | |
234 static int | |
235 hsfsinit(int fstype, char *name) | |
236 { | |
237 static const fs_operation_def_t hsfs_vfsops_template[] = { | |
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238 VFSNAME_MOUNT, { .vfs_mount = hsfs_mount }, |
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239 VFSNAME_UNMOUNT, { .vfs_unmount = hsfs_unmount }, |
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240 VFSNAME_ROOT, { .vfs_root = hsfs_root }, |
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241 VFSNAME_STATVFS, { .vfs_statvfs = hsfs_statvfs }, |
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242 VFSNAME_VGET, { .vfs_vget = hsfs_vget }, |
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243 VFSNAME_MOUNTROOT, { .vfs_mountroot = hsfs_mountroot }, |
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244 NULL, NULL |
0 | 245 }; |
246 int error; | |
247 | |
248 error = vfs_setfsops(fstype, hsfs_vfsops_template, NULL); | |
249 if (error != 0) { | |
250 cmn_err(CE_WARN, "hsfsinit: bad vfs ops template"); | |
251 return (error); | |
252 } | |
253 | |
254 error = vn_make_ops(name, hsfs_vnodeops_template, &hsfs_vnodeops); | |
255 if (error != 0) { | |
256 (void) vfs_freevfsops_by_type(fstype); | |
257 cmn_err(CE_WARN, "hsfsinit: bad vnode ops template"); | |
258 return (error); | |
259 } | |
260 | |
261 hsfsfstype = fstype; | |
262 mutex_init(&hs_mounttab_lock, NULL, MUTEX_DEFAULT, NULL); | |
263 hs_init_hsnode_cache(); | |
264 return (0); | |
265 } | |
266 | |
267 /*ARGSUSED*/ | |
268 static int | |
269 hsfs_mount(struct vfs *vfsp, struct vnode *mvp, | |
270 struct mounta *uap, struct cred *cr) | |
271 { | |
272 int vnode_busy; | |
273 dev_t dev; | |
274 struct pathname dpn; | |
275 int error; | |
276 mode_t mode; | |
277 int flags; /* this will hold the mount specific data */ | |
278 | |
279 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) | |
280 return (error); | |
281 | |
282 if (mvp->v_type != VDIR) | |
283 return (ENOTDIR); | |
284 | |
285 /* mount option must be read only, else mount will be rejected */ | |
286 if (!(uap->flags & MS_RDONLY)) | |
287 return (EROFS); | |
288 | |
289 /* | |
290 * We already told the framework that we don't support remounting. | |
291 */ | |
292 ASSERT(!(uap->flags & MS_REMOUNT)); | |
293 | |
294 mutex_enter(&mvp->v_lock); | |
295 vnode_busy = (mvp->v_count != 1) || (mvp->v_flag & VROOT); | |
296 mutex_exit(&mvp->v_lock); | |
297 | |
298 if ((uap->flags & MS_OVERLAY) == 0 && vnode_busy) { | |
299 return (EBUSY); | |
300 } | |
301 | |
302 /* | |
303 * Check for the options that actually affect things | |
304 * at our level. | |
305 */ | |
306 flags = 0; | |
307 if (vfs_optionisset(vfsp, HOPT_NOMAPLCASE, NULL)) | |
308 flags |= HSFSMNT_NOMAPLCASE; | |
309 if (vfs_optionisset(vfsp, HOPT_NOTRAILDOT, NULL)) | |
310 flags |= HSFSMNT_NOTRAILDOT; | |
311 if (vfs_optionisset(vfsp, HOPT_NRR, NULL)) | |
312 flags |= HSFSMNT_NORRIP; | |
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313 if (vfs_optionisset(vfsp, HOPT_NOJOLIET, NULL)) |
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314 flags |= HSFSMNT_NOJOLIET; |
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315 if (vfs_optionisset(vfsp, HOPT_JOLIETLONG, NULL)) |
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316 flags |= HSFSMNT_JOLIETLONG; |
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317 if (vfs_optionisset(vfsp, HOPT_NOVERS2, NULL)) |
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318 flags |= HSFSMNT_NOVERS2; |
0 | 319 |
320 error = pn_get(uap->dir, (uap->flags & MS_SYSSPACE) ? | |
321 UIO_SYSSPACE : UIO_USERSPACE, &dpn); | |
322 if (error) | |
323 return (error); | |
324 | |
325 if ((error = hs_getmdev(vfsp, uap->spec, uap->flags, &dev, | |
326 &mode, cr)) != 0) { | |
327 pn_free(&dpn); | |
328 return (error); | |
329 } | |
330 | |
331 /* | |
332 * If the device is a tape, return error | |
333 */ | |
334 if ((BDEVFLAG(dev) & D_TAPE) == D_TAPE) { | |
335 pn_free(&dpn); | |
336 return (ENOTBLK); | |
337 } | |
338 | |
339 /* | |
340 * Mount the filesystem. | |
341 */ | |
342 error = hs_mountfs(vfsp, dev, dpn.pn_path, mode, flags, cr, 0); | |
343 pn_free(&dpn); | |
344 return (error); | |
345 } | |
346 | |
347 /*ARGSUSED*/ | |
348 static int | |
349 hsfs_unmount( | |
350 struct vfs *vfsp, | |
351 int flag, | |
352 struct cred *cr) | |
353 { | |
354 struct hsfs **tspp; | |
355 struct hsfs *fsp; | |
356 | |
357 if (secpolicy_fs_unmount(cr, vfsp) != 0) | |
358 return (EPERM); | |
359 | |
360 /* | |
361 * forced unmount is not supported by this file system | |
362 * and thus, ENOTSUP is being returned. | |
363 */ | |
364 if (flag & MS_FORCE) | |
365 return (ENOTSUP); | |
366 | |
367 fsp = VFS_TO_HSFS(vfsp); | |
368 | |
369 if (fsp->hsfs_rootvp->v_count != 1) | |
370 return (EBUSY); | |
371 | |
372 /* destroy all old pages and hsnodes for this vfs */ | |
373 if (hs_synchash(vfsp)) | |
374 return (EBUSY); | |
375 | |
376 mutex_enter(&hs_mounttab_lock); | |
377 for (tspp = &hs_mounttab; *tspp != NULL; tspp = &(*tspp)->hsfs_next) { | |
378 if (*tspp == fsp) | |
379 break; | |
380 } | |
381 if (*tspp == NULL) { | |
382 mutex_exit(&hs_mounttab_lock); | |
383 panic("hsfs_unmount: vfs not mounted?"); | |
384 /*NOTREACHED*/ | |
385 } | |
386 | |
387 *tspp = fsp->hsfs_next; | |
388 | |
389 mutex_exit(&hs_mounttab_lock); | |
390 | |
391 (void) VOP_CLOSE(fsp->hsfs_devvp, FREAD, 1, (offset_t)0, cr); | |
392 VN_RELE(fsp->hsfs_devvp); | |
393 /* free path table space */ | |
394 if (fsp->hsfs_ptbl != NULL) | |
395 kmem_free(fsp->hsfs_ptbl, | |
396 (size_t)fsp->hsfs_vol.ptbl_len); | |
397 /* free path table index table */ | |
398 if (fsp->hsfs_ptbl_idx != NULL) | |
399 kmem_free(fsp->hsfs_ptbl_idx, (size_t) | |
400 (fsp->hsfs_ptbl_idx_size * sizeof (struct ptable_idx))); | |
401 | |
402 /* free "mounted on" pathame */ | |
403 if (fsp->hsfs_fsmnt != NULL) | |
404 kmem_free(fsp->hsfs_fsmnt, strlen(fsp->hsfs_fsmnt) + 1); | |
405 | |
406 mutex_destroy(&fsp->hsfs_free_lock); | |
407 rw_destroy(&fsp->hsfs_hash_lock); | |
408 | |
409 kmem_free(fsp, sizeof (*fsp)); | |
410 return (0); | |
411 } | |
412 | |
413 /*ARGSUSED*/ | |
414 static int | |
415 hsfs_root(struct vfs *vfsp, struct vnode **vpp) | |
416 { | |
417 *vpp = (VFS_TO_HSFS(vfsp))->hsfs_rootvp; | |
418 VN_HOLD(*vpp); | |
419 return (0); | |
420 } | |
421 | |
422 /*ARGSUSED*/ | |
423 static int | |
424 hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp) | |
425 { | |
426 struct hsfs *fsp; | |
427 dev32_t d32; | |
428 | |
429 fsp = VFS_TO_HSFS(vfsp); | |
430 if (fsp->hsfs_magic != HSFS_MAGIC) | |
431 return (EINVAL); | |
432 bzero(sbp, sizeof (*sbp)); | |
433 sbp->f_bsize = vfsp->vfs_bsize; | |
434 sbp->f_frsize = sbp->f_bsize; /* no fragment, same as block size */ | |
435 sbp->f_blocks = (fsblkcnt64_t)fsp->hsfs_vol.vol_size; | |
436 | |
437 sbp->f_bfree = (fsblkcnt64_t)0; | |
438 sbp->f_bavail = (fsblkcnt64_t)0; | |
439 sbp->f_files = (fsfilcnt64_t)-1; | |
440 sbp->f_ffree = (fsfilcnt64_t)0; | |
441 sbp->f_favail = (fsfilcnt64_t)0; | |
442 (void) cmpldev(&d32, vfsp->vfs_dev); | |
443 sbp->f_fsid = d32; | |
444 (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); | |
445 sbp->f_flag = vf_to_stf(vfsp->vfs_flag); | |
446 sbp->f_namemax = fsp->hsfs_namemax; | |
447 (void) strcpy(sbp->f_fstr, fsp->hsfs_vol.vol_id); | |
448 | |
449 return (0); | |
450 } | |
451 | |
452 /* | |
453 * Previously nodeid was declared as uint32_t. This has been changed | |
454 * to conform better with the ISO9660 standard. The standard states that | |
455 * a LBN can be a 32 bit number, as the MAKE_NODEID macro shifts this | |
456 * LBN 11 places left (LBN_TO_BYTE) and then shifts the result 5 right | |
457 * (divide by 32) we are left with the potential of an overflow if | |
458 * confined to a 32 bit value. | |
459 */ | |
460 | |
461 static int | |
462 hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) | |
463 { | |
464 struct hsfid *fid; | |
465 struct hsfs *fsp; | |
466 ino64_t nodeid; | |
467 int error; | |
468 | |
469 fsp = (struct hsfs *)VFS_TO_HSFS(vfsp); | |
470 fid = (struct hsfid *)fidp; | |
471 | |
472 /* | |
473 * Look for vnode on hashlist. | |
474 * If found, it's now active and the refcnt was incremented. | |
475 */ | |
476 | |
477 rw_enter(&fsp->hsfs_hash_lock, RW_READER); | |
478 | |
4399 | 479 nodeid = (ino64_t)MAKE_NODEID(fid->hf_dir_lbn, fid->hf_dir_off, vfsp); |
0 | 480 |
4399 | 481 if ((*vpp = hs_findhash(nodeid, vfsp)) == NULL) { |
0 | 482 /* |
483 * Not in cache, so we need to remake it. | |
484 * hs_remakenode() will read the directory entry | |
485 * and then check again to see if anyone else has | |
486 * put it in the cache. | |
487 */ | |
488 rw_exit(&fsp->hsfs_hash_lock); | |
489 error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, | |
490 vfsp, vpp); | |
491 return (error); | |
492 } | |
493 rw_exit(&fsp->hsfs_hash_lock); | |
494 return (0); | |
495 } | |
496 | |
497 | |
498 #define CHECKSUM_SIZE (64 * 1024) | |
499 | |
500 /* | |
501 * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD | |
502 * We use the 'fsp' argument to determine the location of the root | |
503 * directory entry, and we start reading from there. | |
504 */ | |
505 static int | |
506 compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) | |
507 { | |
508 uint_t secno; | |
509 struct hs_volume *hsvp = &fsp->hsfs_vol; | |
510 struct buf *bp; | |
511 int error; | |
512 int fsid; | |
513 | |
514 secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; | |
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515 bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); |
0 | 516 error = geterror(bp); |
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517 |
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518 /* |
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519 * An error on read or a partial read means we asked |
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520 * for a nonexistant/corrupted piece of the device |
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521 * (including past-the-end of the media). Don't |
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522 * try to use the checksumming method then. |
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523 */ |
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524 if (!error && bp->b_bcount == CHECKSUM_SIZE) { |
0 | 525 int *ibuf = (int *)bp->b_un.b_addr; |
526 int i; | |
527 | |
528 fsid = 0; | |
529 | |
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530 for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) |
0 | 531 fsid ^= ibuf[ i ]; |
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532 } else { |
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533 /* |
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534 * Fallback - use creation date |
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535 */ |
0 | 536 fsid = hsvp->cre_date.tv_sec; |
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537 } |
0 | 538 |
539 brelse(bp); | |
540 | |
541 return (fsid); | |
542 } | |
543 | |
544 | |
545 /*ARGSUSED*/ | |
546 static int | |
547 hs_mountfs( | |
548 struct vfs *vfsp, | |
549 dev_t dev, | |
550 char *path, | |
551 mode_t mode, | |
552 int mount_flags, | |
553 struct cred *cr, | |
554 int isroot) | |
555 { | |
556 struct vnode *devvp; | |
557 struct hsfs *tsp; | |
558 struct hsfs *fsp = NULL; | |
559 struct vattr vap; | |
560 struct hsnode *hp; | |
561 int error; | |
562 struct timeval tv; | |
563 int fsid; | |
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564 int use_rrip; |
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565 int use_vers2; |
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566 int use_joliet; |
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567 int has_rrip = 0; |
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568 int has_vers2 = 0; |
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569 int has_joliet = 0; |
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570 int force_rrip_off; |
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571 int force_vers2_off; |
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572 int force_joliet_off; |
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573 size_t pathbufsz = strlen(path) + 1; |
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574 int redo_rootvp; |
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575 |
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576 struct hs_volume *svp; /* Supplemental VD for ISO-9660:1999 */ |
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577 struct hs_volume *jvp; /* Joliet VD */ |
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578 |
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579 /* |
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580 * The rules for which extension will be used are: |
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581 * 1. No specific mount options given: |
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582 * - use rrip if available |
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583 * - use ISO9660:1999 if available |
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584 * - use joliet if available. |
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585 * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: |
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586 * - use next "lower" extension |
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587 * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: |
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588 * - disable rrip support even if available |
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589 * - disable IOS9660:1999 support even if available |
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590 * |
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591 * We need to adjust these flags as we discover the extensions |
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592 * present. See below. These are just the starting values. |
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593 */ |
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594 use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; |
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595 use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; |
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596 use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; |
0 | 597 |
598 /* | |
599 * Open the device | |
600 */ | |
601 devvp = makespecvp(dev, VBLK); | |
602 ASSERT(devvp != 0); | |
603 | |
604 /* | |
605 * Open the target device (file) for read only. | |
606 */ | |
607 if (error = VOP_OPEN(&devvp, FREAD, cr)) { | |
608 VN_RELE(devvp); | |
609 return (error); | |
610 } | |
611 | |
612 /* | |
613 * Refuse to go any further if this | |
614 * device is being used for swapping | |
615 */ | |
616 if (IS_SWAPVP(common_specvp(devvp))) { | |
617 error = EBUSY; | |
618 goto cleanup; | |
619 } | |
620 | |
621 vap.va_mask = AT_SIZE; | |
622 if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr)) != 0) { | |
623 cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); | |
624 goto cleanup; | |
625 } | |
626 | |
627 /* | |
628 * Make sure we have a nonzero size partition. | |
629 * The current version of the SD driver will *not* fail the open | |
630 * of such a partition so we have to check for it here. | |
631 */ | |
632 if (vap.va_size == 0) { | |
633 error = ENXIO; | |
634 goto cleanup; | |
635 } | |
636 | |
637 /* | |
638 * Init a new hsfs structure. | |
639 */ | |
640 fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); | |
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641 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); |
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642 jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); |
0 | 643 |
644 /* hardwire perms, uid, gid */ | |
645 fsp->hsfs_vol.vol_uid = hsfs_default_uid; | |
646 fsp->hsfs_vol.vol_gid = hsfs_default_gid; | |
647 fsp->hsfs_vol.vol_prot = hsfs_default_mode; | |
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648 svp->vol_uid = hsfs_default_uid; |
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649 svp->vol_gid = hsfs_default_gid; |
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650 svp->vol_prot = hsfs_default_mode; |
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651 jvp->vol_uid = hsfs_default_uid; |
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652 jvp->vol_gid = hsfs_default_gid; |
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653 jvp->vol_prot = hsfs_default_mode; |
0 | 654 |
655 /* | |
656 * Look for a Standard File Structure Volume Descriptor, | |
657 * of which there must be at least one. | |
658 * If found, check for volume size consistency. | |
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659 * |
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660 * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD |
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661 * If jvp->lbn_size is != 0, we did find a Joliet SVD. |
0 | 662 */ |
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663 fsp->hsfs_namemax = ISO_FILE_NAMELEN; |
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664 fsp->hsfs_namelen = ISO_FILE_NAMELEN; |
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665 error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); |
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666 if (error == EINVAL) /* no iso 9660 - try high sierra ... */ |
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667 error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); |
0 | 668 |
669 if (error) | |
670 goto cleanup; | |
671 | |
2900
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672 DTRACE_PROBE4(findvol, |
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673 struct hsfs *, fsp, |
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674 struct hs_volume *, &fsp->hsfs_vol, |
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675 struct hs_volume *, svp, |
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676 struct hs_volume *, jvp); |
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677 |
0 | 678 /* |
679 * Generate a file system ID from the CD-ROM, | |
680 * and check it for uniqueness. | |
681 * | |
682 * What we are aiming for is some chance of integrity | |
683 * across disk change. That is, if a client has an fhandle, | |
684 * it will be valid as long as the same disk is mounted. | |
685 */ | |
686 fsid = compute_cdrom_id(fsp, devvp); | |
687 | |
688 mutex_enter(&hs_mounttab_lock); | |
689 | |
690 if (fsid == 0 || fsid == -1) { | |
691 uniqtime(&tv); | |
692 fsid = tv.tv_sec; | |
693 } else /* make sure that the fsid is unique */ | |
694 for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { | |
695 if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { | |
696 uniqtime(&tv); | |
697 fsid = tv.tv_sec; | |
698 break; | |
699 } | |
700 } | |
701 | |
702 fsp->hsfs_next = hs_mounttab; | |
703 hs_mounttab = fsp; | |
704 | |
705 fsp->hsfs_devvp = devvp; | |
706 fsp->hsfs_vfs = vfsp; | |
2900
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707 fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); |
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708 (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); |
0 | 709 |
710 mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); | |
711 rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); | |
712 | |
713 vfsp->vfs_data = (caddr_t)fsp; | |
714 vfsp->vfs_dev = dev; | |
715 vfsp->vfs_fstype = hsfsfstype; | |
716 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ | |
717 vfsp->vfs_fsid.val[0] = fsid; | |
718 vfsp->vfs_fsid.val[1] = hsfsfstype; | |
719 | |
2900
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720 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { |
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721 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); |
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722 error = EINVAL; |
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|
723 goto cleanup; |
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|
724 } |
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725 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); |
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|
726 |
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|
727 /* |
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728 * Attempt to discover a RR extension. |
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|
729 */ |
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|
730 if (use_rrip) { |
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731 hp = VTOH(fsp->hsfs_rootvp); |
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732 hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); |
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|
733 } |
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|
734 |
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|
735 has_rrip = IS_RRIP_IMPLEMENTED(fsp); |
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|
736 has_vers2 = (svp->lbn_size != 0); |
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737 has_joliet = (jvp->lbn_size != 0); |
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|
738 |
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|
739 DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, |
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740 int, use_rrip, int, use_vers2, int, use_joliet); |
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|
741 |
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|
742 DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, |
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743 int, has_rrip, int, has_vers2, int, has_joliet); |
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|
744 |
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|
745 DTRACE_PROBE4(findvol, |
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|
746 struct hsfs *, fsp, |
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|
747 struct hs_volume *, &fsp->hsfs_vol, |
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748 struct hs_volume *, svp, |
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|
749 struct hs_volume *, jvp); |
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diff
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|
750 |
8188e64c9073
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|
751 force_rrip_off = !use_rrip || |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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changeset
|
752 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
753 (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
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|
754 |
8188e64c9073
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diff
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|
755 force_vers2_off = !use_vers2 || |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
756 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
757 |
8188e64c9073
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diff
changeset
|
758 force_joliet_off = !use_joliet; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
759 |
8188e64c9073
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diff
changeset
|
760 DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
761 int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
762 |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
763 /* |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
764 * At the moment, we have references of all three possible |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
765 * extensions (RR, ISO9660:1999/v2 and Joliet) if present. |
8188e64c9073
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frankho
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diff
changeset
|
766 * |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
767 * The "active" volume descriptor is RRIP (or ISO9660:1988). |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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changeset
|
768 * We now switch to the user-requested one. |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
769 */ |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
770 redo_rootvp = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
771 |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
772 if (force_rrip_off || !has_rrip) { |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
773 if (has_vers2 && !force_vers2_off) { |
8188e64c9073
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diff
changeset
|
774 VN_RELE(fsp->hsfs_rootvp); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
775 bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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1488
diff
changeset
|
776 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; |
8188e64c9073
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changeset
|
777 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; |
8188e64c9073
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frankho
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diff
changeset
|
778 redo_rootvp = 1; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
779 has_joliet = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
780 } else if (has_joliet && !force_joliet_off) { |
8188e64c9073
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frankho
parents:
1488
diff
changeset
|
781 VN_RELE(fsp->hsfs_rootvp); |
8188e64c9073
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diff
changeset
|
782 bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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1488
diff
changeset
|
783 fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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parents:
1488
diff
changeset
|
784 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
785 redo_rootvp = 1; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
786 has_vers2 = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
787 } |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
788 } |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
789 |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
790 if (redo_rootvp) { |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
791 /* |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
792 * Make sure not to use Rock Ridge. |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
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diff
changeset
|
793 */ |
8188e64c9073
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frankho
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diff
changeset
|
794 UNSET_IMPL_BIT(fsp, RRIP_BIT); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
795 UNSET_SUSP_BIT(fsp); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
796 has_rrip = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
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diff
changeset
|
797 |
8188e64c9073
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parents:
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diff
changeset
|
798 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
799 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
800 error = EINVAL; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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parents:
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diff
changeset
|
801 goto cleanup; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
802 } |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
803 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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parents:
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diff
changeset
|
804 } |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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parents:
1488
diff
changeset
|
805 if (IS_RRIP_IMPLEMENTED(fsp)) { |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
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diff
changeset
|
806 has_vers2 = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
807 has_joliet = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
808 } |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
809 if (force_vers2_off) |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
810 has_vers2 = 0; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
811 if (force_joliet_off) |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
812 has_joliet = 0; |
8188e64c9073
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1488
diff
changeset
|
813 DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
814 int, has_rrip, int, has_vers2, int, has_joliet); |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
815 |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
816 /* |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
817 * mark root node as VROOT |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
1488
diff
changeset
|
818 */ |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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1488
diff
changeset
|
819 fsp->hsfs_rootvp->v_flag |= VROOT; |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
820 |
8188e64c9073
PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
frankho
parents:
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diff
changeset
|
821 /* Here we take care of some special case stuff for mountroot */ |
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|
822 if (isroot) { |
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|
823 fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; |
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|
824 rootvp = fsp->hsfs_rootvp; |
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|
825 } |
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|
826 |
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|
827 if (IS_RRIP_IMPLEMENTED(fsp)) { |
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|
828 /* |
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|
829 * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags |
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|
830 */ |
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|
831 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); |
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|
832 |
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|
833 fsp->hsfs_namemax = RRIP_FILE_NAMELEN; |
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834 fsp->hsfs_namelen = RRIP_FILE_NAMELEN; |
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|
835 |
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|
836 ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); |
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837 vfs_clearmntopt(vfsp, HOPT_VERS2); |
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838 vfs_clearmntopt(vfsp, HOPT_JOLIET); |
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|
839 |
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|
840 } else switch (fsp->hsfs_vol_type) { |
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|
841 |
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|
842 case HS_VOL_TYPE_HS: |
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|
843 case HS_VOL_TYPE_ISO: |
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|
844 default: |
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|
845 /* |
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|
846 * if iso v1, don't allow trailing spaces in iso file names |
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|
847 */ |
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|
848 mount_flags |= HSFSMNT_NOTRAILSPACE; |
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|
849 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; |
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850 fsp->hsfs_namelen = ISO_FILE_NAMELEN; |
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851 vfs_clearmntopt(vfsp, HOPT_RR); |
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852 vfs_clearmntopt(vfsp, HOPT_VERS2); |
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853 vfs_clearmntopt(vfsp, HOPT_JOLIET); |
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854 break; |
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|
855 |
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|
856 case HS_VOL_TYPE_ISO_V2: |
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|
857 /* |
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858 * if iso v2, don't copy NOTRAILDOT to hsfs_flags |
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859 */ |
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860 mount_flags &= ~HSFSMNT_NOTRAILDOT; |
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861 mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; |
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862 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; |
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863 fsp->hsfs_namelen = ISO_NAMELEN_V2; |
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864 vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); |
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865 vfs_clearmntopt(vfsp, HOPT_RR); |
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866 vfs_clearmntopt(vfsp, HOPT_JOLIET); |
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|
867 break; |
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|
868 |
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869 case HS_VOL_TYPE_JOLIET: |
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|
870 /* |
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871 * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags |
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|
872 */ |
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873 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); |
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874 mount_flags |= HSFSMNT_NOMAPLCASE; |
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875 if (mount_flags & HSFSMNT_JOLIETLONG) |
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876 fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ |
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|
877 else |
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878 fsp->hsfs_namemax = MAXNAMELEN-1; |
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879 fsp->hsfs_namelen = JOLIET_NAMELEN*2; |
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880 vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); |
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881 vfs_clearmntopt(vfsp, HOPT_RR); |
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|
882 vfs_clearmntopt(vfsp, HOPT_VERS2); |
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|
883 break; |
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|
884 } |
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|
885 |
4399 | 886 fsp->hsfs_flags = mount_flags; |
2900
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|
887 |
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|
888 DTRACE_PROBE1(mount__done, struct hsfs *, fsp); |
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|
889 |
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changeset
|
890 /* |
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|
891 * set the magic word |
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diff
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|
892 */ |
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|
893 fsp->hsfs_magic = HSFS_MAGIC; |
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|
894 mutex_exit(&hs_mounttab_lock); |
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|
895 |
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|
896 return (0); |
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changeset
|
897 |
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|
898 cleanup: |
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diff
changeset
|
899 (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr); |
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|
900 VN_RELE(devvp); |
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changeset
|
901 if (fsp) |
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changeset
|
902 kmem_free(fsp, sizeof (*fsp)); |
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changeset
|
903 if (svp) |
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diff
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|
904 kmem_free(svp, sizeof (*svp)); |
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diff
changeset
|
905 if (jvp) |
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diff
changeset
|
906 kmem_free(jvp, sizeof (*jvp)); |
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diff
changeset
|
907 return (error); |
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diff
changeset
|
908 } |
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diff
changeset
|
909 |
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diff
changeset
|
910 /* |
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diff
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|
911 * Get the rootvp associated with fsp->hsfs_vol |
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diff
changeset
|
912 */ |
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PSARC 2006/509 HSFS extensions for Joliet/ISO9660:v2
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diff
changeset
|
913 static int |
8188e64c9073
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diff
changeset
|
914 hs_getrootvp( |
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parents:
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diff
changeset
|
915 struct vfs *vfsp, |
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changeset
|
916 struct hsfs *fsp, |
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diff
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|
917 size_t pathsize) |
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diff
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|
918 { |
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parents:
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diff
changeset
|
919 struct hsnode *hp; |
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diff
changeset
|
920 |
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diff
changeset
|
921 ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); |
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|
922 |
0 | 923 /* |
924 * If the root directory does not appear to be | |
925 * valid, use what it points to as "." instead. | |
926 * Some Defense Mapping Agency disks are non-conformant | |
927 * in this way. | |
928 */ | |
929 if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { | |
930 hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); | |
931 if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, | |
932 (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { | |
1025
1aef26bcfa0e
6300064 hsfs_spec.h has developed a southern drawl.
frankho
parents:
494
diff
changeset
|
933 hs_mounttab = hs_mounttab->hsfs_next; |
1aef26bcfa0e
6300064 hsfs_spec.h has developed a southern drawl.
frankho
parents:
494
diff
changeset
|
934 mutex_destroy(&fsp->hsfs_free_lock); |
1aef26bcfa0e
6300064 hsfs_spec.h has developed a southern drawl.
frankho
parents:
494
diff
changeset
|
935 rw_destroy(&fsp->hsfs_hash_lock); |
2900
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diff
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|
936 kmem_free(fsp->hsfs_fsmnt, pathsize); |
494
e082e44c7fce
6244328 hsfs not resistant against malformed ISO9660 filesystems, crashes/hangs
frankho
parents:
0
diff
changeset
|
937 mutex_exit(&hs_mounttab_lock); |
2900
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parents:
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diff
changeset
|
938 return (0); |
0 | 939 } |
940 } else { | |
941 fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, | |
942 fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); | |
943 } | |
944 | |
945 /* XXX - ignore the path table for now */ | |
946 fsp->hsfs_ptbl = NULL; | |
947 hp = VTOH(fsp->hsfs_rootvp); | |
948 hp->hs_ptbl_idx = NULL; | |
949 | |
2900
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parents:
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diff
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|
950 return (1); |
0 | 951 } |
952 | |
953 /* | |
954 * hs_findhsvol() | |
955 * | |
956 * Locate the Standard File Structure Volume Descriptor and | |
957 * parse it into an hs_volume structure. | |
958 * | |
959 * XXX - May someday want to look for Coded Character Set FSVD, too. | |
960 */ | |
961 static int | |
962 hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) | |
963 { | |
964 struct buf *secbp; | |
965 int i; | |
966 uchar_t *volp; | |
967 int error; | |
968 uint_t secno; | |
969 | |
970 secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); | |
971 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); | |
972 error = geterror(secbp); | |
973 | |
974 if (error != 0) { | |
975 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); | |
976 brelse(secbp); | |
977 return (error); | |
978 } | |
979 | |
980 volp = (uchar_t *)secbp->b_un.b_addr; | |
981 | |
4399 | 982 while (HSV_DESC_TYPE(volp) != VD_EOV) { |
0 | 983 for (i = 0; i < HSV_ID_STRLEN; i++) |
984 if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) | |
985 goto cantfind; | |
986 if (HSV_STD_VER(volp) != HSV_ID_VER) | |
987 goto cantfind; | |
988 switch (HSV_DESC_TYPE(volp)) { | |
989 case VD_SFS: | |
990 /* Standard File Structure */ | |
991 fsp->hsfs_vol_type = HS_VOL_TYPE_HS; | |
992 error = hs_parsehsvol(fsp, volp, hvp); | |
993 brelse(secbp); | |
994 return (error); | |
995 | |
996 case VD_CCFS: | |
997 /* Coded Character File Structure */ | |
998 case VD_BOOT: | |
999 case VD_UNSPEC: | |
1000 case VD_EOV: | |
1001 break; | |
1002 } | |
1003 brelse(secbp); | |
1004 ++secno; | |
1005 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); | |
1006 | |
1007 error = geterror(secbp); | |
1008 | |
1009 if (error != 0) { | |
1010 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", | |
1011 error); | |
1012 brelse(secbp); | |
1013 return (error); | |
1014 } | |
1015 | |
1016 volp = (uchar_t *)secbp->b_un.b_addr; | |
1017 } | |
1018 cantfind: | |
1019 brelse(secbp); | |
1020 return (EINVAL); | |
1021 } | |
1022 | |
1023 /* | |
1024 * hs_parsehsvol | |
1025 * | |
1026 * Parse the Standard File Structure Volume Descriptor into | |
1027 * an hs_volume structure. We can't just bcopy it into the | |
1028 * structure because of byte-ordering problems. | |
1029 * | |
1030 */ | |
1031 static int | |
1032 hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) | |
1033 { | |
1034 hvp->vol_size = HSV_VOL_SIZE(volp); | |
1035 hvp->lbn_size = HSV_BLK_SIZE(volp); | |
1036 if (hvp->lbn_size == 0) { | |
1037 cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " | |
1038 "SFSVD is zero"); | |
1039 return (EINVAL); | |
1040 } | |
1041 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; | |
1042 hvp->lbn_secshift = ffs((long)howmany(HS_SECTOR_SIZE, | |
1043 (int)hvp->lbn_size)) - 1; | |
1044 hvp->lbn_maxoffset = hvp->lbn_size - 1; | |
1045 hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); | |
1046 hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); | |
1047 hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); | |
1048 hvp->ptbl_len = HSV_PTBL_SIZE(volp); | |
1049 hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); | |
1050 hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); | |
1051 #if defined(_LITTLE_ENDIAN) | |
1052 hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); | |
1053 #else | |
1054 hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); | |
1055 #endif | |
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1056 hs_copylabel(hvp, HSV_VOL_ID(volp), 0); |
0 | 1057 |
1058 /* | |
1059 * Make sure that lbn_size is a power of two and otherwise valid. | |
1060 */ | |
1061 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { | |
1062 cmn_err(CE_NOTE, | |
1063 "hsfs: %d-byte logical block size not supported", | |
1064 hvp->lbn_size); | |
1065 return (EINVAL); | |
1066 } | |
1067 return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, | |
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1068 (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); |
0 | 1069 } |
1070 | |
1071 /* | |
1072 * hs_findisovol() | |
1073 * | |
1074 * Locate the Primary Volume Descriptor | |
1075 * parse it into an hs_volume structure. | |
1076 * | |
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1077 * XXX - Partition not yet done |
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1078 * |
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1079 * Except for fsp->hsfs_vol_type, no fsp member may be modified. |
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1080 * fsp->hsfs_vol is modified indirectly via the *hvp argument. |
0 | 1081 */ |
1082 static int | |
1083 hs_findisovol(struct hsfs *fsp, struct vnode *vp, | |
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1084 struct hs_volume *hvp, |
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1085 struct hs_volume *svp, |
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1086 struct hs_volume *jvp) |
0 | 1087 { |
1088 struct buf *secbp; | |
1089 int i; | |
1090 uchar_t *volp; | |
1091 int error; | |
1092 uint_t secno; | |
1093 int foundpvd = 0; | |
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1094 int foundsvd = 0; |
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1095 int foundjvd = 0; |
0 | 1096 |
1097 secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); | |
1098 secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); | |
1099 error = geterror(secbp); | |
1100 | |
1101 if (error != 0) { | |
1102 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); | |
1103 brelse(secbp); | |
1104 return (error); | |
1105 } | |
1106 | |
1107 volp = (uchar_t *)secbp->b_un.b_addr; | |
1108 | |
4399 | 1109 while ((enum iso_voldesc_type) ISO_DESC_TYPE(volp) != ISO_VD_EOV) { |
0 | 1110 for (i = 0; i < ISO_ID_STRLEN; i++) |
1111 if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) | |
1112 goto cantfind; | |
1113 switch (ISO_DESC_TYPE(volp)) { | |
1114 case ISO_VD_PVD: | |
1115 /* Standard File Structure */ | |
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1116 if (ISO_STD_VER(volp) != ISO_ID_VER) |
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1117 goto cantfind; |
0 | 1118 if (foundpvd != 1) { |
1119 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; | |
1120 if (error = hs_parseisovol(fsp, volp, hvp)) { | |
1121 brelse(secbp); | |
1122 return (error); | |
1123 } | |
1124 foundpvd = 1; | |
1125 } | |
1126 break; | |
1127 case ISO_VD_SVD: | |
1128 /* Supplementary Volume Descriptor */ | |
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1129 if (ISO_STD_VER(volp) == ISO_ID_VER2 && |
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1130 foundsvd != 1) { |
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1131 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; |
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1132 if (error = hs_parseisovol(fsp, volp, svp)) { |
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1133 brelse(secbp); |
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1134 return (error); |
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1135 } |
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1136 foundsvd = 1; |
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1137 } |
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1138 if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { |
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1139 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; |
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1140 if (error = hs_parseisovol(fsp, volp, jvp)) { |
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1141 brelse(secbp); |
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1142 return (error); |
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|
1143 } |
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1144 foundjvd = 1; |
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1145 } |
0 | 1146 break; |
1147 case ISO_VD_BOOT: | |
1148 break; | |
1149 case ISO_VD_VPD: | |
1150 /* currently cannot handle partition */ | |
1151 break; | |
1152 case VD_EOV: | |
1153 break; | |
1154 } | |
1155 brelse(secbp); | |
1156 ++secno; | |
1157 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); | |
1158 error = geterror(secbp); | |
1159 | |
1160 if (error != 0) { | |
1161 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", | |
1162 error); | |
1163 brelse(secbp); | |
1164 return (error); | |
1165 } | |
1166 | |
1167 volp = (uchar_t *)secbp->b_un.b_addr; | |
1168 } | |
1169 if (foundpvd) { | |
1170 brelse(secbp); | |
1171 return (0); | |
1172 } | |
1173 cantfind: | |
1174 brelse(secbp); | |
1175 return (EINVAL); | |
1176 } | |
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1177 |
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1178 /* |
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1179 * Return 0 if no Joliet is found |
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1180 * else return Joliet Level 1..3 |
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1181 */ |
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1182 static int |
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1183 hs_joliet_level(uchar_t *volp) |
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1184 { |
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1185 if (ISO_std_ver(volp)[0] == ISO_ID_VER && |
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1186 ISO_svd_esc(volp)[0] == '%' && |
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1187 ISO_svd_esc(volp)[1] == '/') { |
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|
1188 |
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1189 switch (ISO_svd_esc(volp)[2]) { |
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diff
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|
1190 |
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|
1191 case '@': |
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diff
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|
1192 return (1); |
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diff
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|
1193 case 'C': |
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diff
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|
1194 return (2); |
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|
1195 case 'E': |
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|
1196 return (3); |
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|
1197 } |
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|
1198 } |
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|
1199 return (0); |
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|
1200 } |
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1201 |
0 | 1202 /* |
1203 * hs_parseisovol | |
1204 * | |
1205 * Parse the Primary Volume Descriptor into an hs_volume structure. | |
1206 * | |
1207 */ | |
1208 static int | |
1209 hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) | |
1210 { | |
1211 hvp->vol_size = ISO_VOL_SIZE(volp); | |
1212 hvp->lbn_size = ISO_BLK_SIZE(volp); | |
1213 if (hvp->lbn_size == 0) { | |
1214 cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " | |
1215 "PVD is zero"); | |
1216 return (EINVAL); | |
1217 } | |
1218 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; | |
1219 hvp->lbn_secshift = ffs((long)howmany(ISO_SECTOR_SIZE, | |
1220 (int)hvp->lbn_size)) - 1; | |
1221 hvp->lbn_maxoffset = hvp->lbn_size - 1; | |
1222 hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); | |
1223 hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); | |
1224 hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); | |
1225 hvp->ptbl_len = ISO_PTBL_SIZE(volp); | |
1226 hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); | |
1227 hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); | |
1228 #if defined(_LITTLE_ENDIAN) | |
1229 hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); | |
1230 #else | |
1231 hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); | |
1232 #endif | |
2900
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|
1233 hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); |
0 | 1234 |
1235 /* | |
1236 * Make sure that lbn_size is a power of two and otherwise valid. | |
1237 */ | |
1238 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { | |
1239 cmn_err(CE_NOTE, | |
1240 "hsfs: %d-byte logical block size not supported", | |
1241 hvp->lbn_size); | |
1242 return (EINVAL); | |
1243 } | |
1244 return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, | |
2900
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1245 (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); |
0 | 1246 } |
1247 | |
1248 /* | |
1249 * Common code for mount and umount. | |
1250 * Check that the user's argument is a reasonable | |
1251 * thing on which to mount, and return the device number if so. | |
1252 */ | |
1253 static int | |
1254 hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, | |
1255 cred_t *cr) | |
1256 { | |
1257 int error; | |
1258 struct vnode *vp; | |
1259 struct vattr vap; | |
1260 dev_t dev; | |
1261 | |
1262 /* | |
1263 * Get the device to be mounted | |
1264 */ | |
1265 error = lookupname(fspec, (flags & MS_SYSSPACE) ? | |
1266 UIO_SYSSPACE : UIO_USERSPACE, FOLLOW, NULLVPP, &vp); | |
1267 if (error) { | |
1268 if (error == ENOENT) { | |
1269 return (ENODEV); /* needs translation */ | |
1270 } | |
1271 return (error); | |
1272 } | |
1273 if (vp->v_type != VBLK) { | |
1274 VN_RELE(vp); | |
1275 return (ENOTBLK); | |
1276 } | |
1277 /* | |
1278 * Can we read from the device? | |
1279 */ | |
1280 if ((error = VOP_ACCESS(vp, VREAD, 0, cr)) != 0 || | |
1281 (error = secpolicy_spec_open(cr, vp, FREAD)) != 0) { | |
1282 VN_RELE(vp); | |
1283 return (error); | |
1284 } | |
1285 | |
1286 vap.va_mask = AT_MODE; /* get protection mode */ | |
1287 (void) VOP_GETATTR(vp, &vap, 0, CRED()); | |
1288 *mode = vap.va_mode; | |
1289 | |
1290 dev = *pdev = vp->v_rdev; | |
1291 VN_RELE(vp); | |
1292 | |
1293 /* | |
1294 * Ensure that this device isn't already mounted, | |
1295 * unless this is a REMOUNT request or we are told to suppress | |
1296 * mount checks. | |
1297 */ | |
1298 if ((flags & MS_NOCHECK) == 0) { | |
1299 if (vfs_devmounting(dev, vfsp)) | |
1300 return (EBUSY); | |
1301 if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) | |
1302 return (EBUSY); | |
1303 } | |
1304 | |
1305 if (getmajor(*pdev) >= devcnt) | |
1306 return (ENXIO); | |
1307 return (0); | |
1308 } | |
1309 | |
1310 static void | |
2900
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1311 hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) |
0 | 1312 { |
2900
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1313 char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ |
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|
1314 |
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1315 if (isjoliet) { |
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1316 /* |
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1317 * hs_joliet_cp() will output 16..48 bytes. |
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1318 * We need to clear 'lbuf' to avoid junk chars past byte 15. |
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1319 */ |
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1320 bzero(lbuf, sizeof (lbuf)); |
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1321 (void) hs_joliet_cp((char *)label, lbuf, 32); |
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1322 label = (unsigned char *)lbuf; |
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1323 } |
0 | 1324 /* cdrom volid is at most 32 bytes */ |
1325 bcopy(label, hvp->vol_id, 32); | |
1326 hvp->vol_id[31] = NULL; | |
1327 } | |
1328 | |
1329 /* | |
1330 * Mount root file system. | |
1331 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to | |
1332 * remount the root file system, and ROOT_UNMOUNT if called to | |
1333 * unmount the root (e.g., as part of a system shutdown). | |
1334 * | |
1335 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP | |
1336 * operation, goes along with auto-configuration. A mechanism should be | |
1337 * provided by which machine-INdependent code in the kernel can say "get me the | |
1338 * right root file system" and "get me the right initial swap area", and have | |
1339 * that done in what may well be a machine-dependent fashion. | |
1340 * Unfortunately, it is also file-system-type dependent (NFS gets it via | |
1341 * bootparams calls, UFS gets it from various and sundry machine-dependent | |
1342 * mechanisms, as SPECFS does for swap). | |
1343 */ | |
1344 static int | |
1345 hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) | |
1346 { | |
1347 int error; | |
1348 struct hsfs *fsp; | |
1349 struct hs_volume *fvolp; | |
1350 static int hsfsrootdone = 0; | |
1351 dev_t rootdev; | |
1352 mode_t mode = 0; | |
1353 | |
1354 if (why == ROOT_INIT) { | |
1355 if (hsfsrootdone++) | |
1356 return (EBUSY); | |
1357 rootdev = getrootdev(); | |
1358 if (rootdev == (dev_t)NODEV) | |
1359 return (ENODEV); | |
1360 vfsp->vfs_dev = rootdev; | |
1361 vfsp->vfs_flag |= VFS_RDONLY; | |
1362 } else if (why == ROOT_REMOUNT) { | |
1363 cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); | |
1364 return (0); | |
1365 } else if (why == ROOT_UNMOUNT) { | |
1366 return (0); | |
1367 } | |
1368 error = vfs_lock(vfsp); | |
1369 if (error) { | |
1370 cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); | |
1371 return (error); | |
1372 } | |
1373 | |
1374 error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); | |
1375 /* | |
1376 * XXX - assumes root device is not indirect, because we don't set | |
1377 * rootvp. Is rootvp used for anything? If so, make another arg | |
1378 * to mountfs. | |
1379 */ | |
1380 if (error) { | |
1381 vfs_unlock(vfsp); | |
1382 if (rootvp) { | |
1383 VN_RELE(rootvp); | |
1384 rootvp = (struct vnode *)0; | |
1385 } | |
1386 return (error); | |
1387 } | |
1388 if (why == ROOT_INIT) | |
1389 vfs_add((struct vnode *)0, vfsp, | |
1390 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); | |
1391 vfs_unlock(vfsp); | |
1392 fsp = VFS_TO_HSFS(vfsp); | |
1393 fvolp = &fsp->hsfs_vol; | |
1394 #ifdef HSFS_CLKSET | |
1395 if (fvolp->cre_date.tv_sec == 0) { | |
1396 cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); | |
1397 if (fvolp->mod_date.tv_sec == 0) { | |
1398 cmn_err(CE_NOTE, "hsfs_mountroot: mod_date.tv_sec == 0"); | |
1399 cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); | |
1400 clkset(-1L); | |
1401 } else | |
1402 clkset(fvolp->mod_date.tv_sec); | |
1403 } else | |
1404 clkset(fvolp->mod_date.tv_sec); | |
1405 #else /* HSFS_CLKSET */ | |
1406 clkset(-1L); | |
1407 #endif /* HSFS_CLKSET */ | |
1408 return (0); | |
1409 } | |
1410 | |
1411 /* | |
1412 * hs_findvoldesc() | |
1413 * | |
1414 * Return the sector where the volume descriptor lives. This is | |
1415 * a fixed value for "normal" cd-rom's, but can change for | |
1416 * multisession cd's. | |
1417 * | |
1418 * desc_sec is the same for high-sierra and iso 9660 formats, why | |
1419 * there are two differnt #defines used in the code for this is | |
1420 * beyond me. These are standards, cast in concrete, right? | |
1421 * To be general, however, this function supports passing in different | |
1422 * values. | |
1423 */ | |
1424 static int | |
1425 hs_findvoldesc(dev_t rdev, int desc_sec) | |
1426 { | |
1427 int secno; | |
1428 int error; | |
1429 int rval; /* ignored */ | |
1430 | |
1431 #ifdef CDROMREADOFFSET | |
1432 /* | |
1433 * Issue the Read Offset ioctl directly to the | |
1434 * device. Ignore any errors and set starting | |
1435 * secno to the default, otherwise add the | |
1436 * VOLDESC sector number to the offset. | |
1437 */ | |
1438 error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, | |
1439 FNATIVE|FKIOCTL|FREAD, CRED(), &rval); | |
1440 if (error) { | |
1441 secno = desc_sec; | |
1442 } else { | |
1443 secno += desc_sec; | |
1444 } | |
1445 #else | |
1446 secno = desc_sec; | |
1447 #endif | |
1448 | |
1449 return (secno); | |
1450 } |