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[davej-history.git] / fs / ufs / super.c
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1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gertjan@cs.vu.nl>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 */
62
63
64 #include <linux/config.h>
65 #include <linux/module.h>
66
67 #include <stdarg.h>
68
69 #include <asm/bitops.h>
70 #include <asm/uaccess.h>
71 #include <asm/system.h>
72
73 #include <linux/errno.h>
74 #include <linux/fs.h>
75 #include <linux/ufs_fs.h>
76 #include <linux/malloc.h>
77 #include <linux/sched.h>
78 #include <linux/stat.h>
79 #include <linux/string.h>
80 #include <linux/locks.h>
81 #include <linux/blkdev.h>
82 #include <linux/init.h>
83
84 #include "swab.h"
85 #include "util.h"
86
87 #undef UFS_SUPER_DEBUG
88 #undef UFS_SUPER_DEBUG_MORE
89
90 #ifdef UFS_SUPER_DEBUG
91 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
92 #else
93 #define UFSD(x)
94 #endif
95
96 #ifdef UFS_SUPER_DEBUG_MORE
97 /*
98 * Print contents of ufs_super_block, useful for debugging
99 */
100 void ufs_print_super_stuff(struct ufs_super_block_first * usb1,
101 struct ufs_super_block_second * usb2,
102 struct ufs_super_block_third * usb3, unsigned swab)
103 {
104 printk("ufs_print_super_stuff\n");
105 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
106 printk(" magic: 0x%x\n", SWAB32(usb3->fs_magic));
107 printk(" sblkno: %u\n", SWAB32(usb1->fs_sblkno));
108 printk(" cblkno: %u\n", SWAB32(usb1->fs_cblkno));
109 printk(" iblkno: %u\n", SWAB32(usb1->fs_iblkno));
110 printk(" dblkno: %u\n", SWAB32(usb1->fs_dblkno));
111 printk(" cgoffset: %u\n", SWAB32(usb1->fs_cgoffset));
112 printk(" ~cgmask: 0x%x\n", ~SWAB32(usb1->fs_cgmask));
113 printk(" size: %u\n", SWAB32(usb1->fs_size));
114 printk(" dsize: %u\n", SWAB32(usb1->fs_dsize));
115 printk(" ncg: %u\n", SWAB32(usb1->fs_ncg));
116 printk(" bsize: %u\n", SWAB32(usb1->fs_bsize));
117 printk(" fsize: %u\n", SWAB32(usb1->fs_fsize));
118 printk(" frag: %u\n", SWAB32(usb1->fs_frag));
119 printk(" fragshift: %u\n", SWAB32(usb1->fs_fragshift));
120 printk(" ~fmask: %u\n", ~SWAB32(usb1->fs_fmask));
121 printk(" fshift: %u\n", SWAB32(usb1->fs_fshift));
122 printk(" sbsize: %u\n", SWAB32(usb1->fs_sbsize));
123 printk(" spc: %u\n", SWAB32(usb1->fs_spc));
124 printk(" cpg: %u\n", SWAB32(usb1->fs_cpg));
125 printk(" ipg: %u\n", SWAB32(usb1->fs_ipg));
126 printk(" fpg: %u\n", SWAB32(usb1->fs_fpg));
127 printk(" csaddr: %u\n", SWAB32(usb1->fs_csaddr));
128 printk(" cssize: %u\n", SWAB32(usb1->fs_cssize));
129 printk(" cgsize: %u\n", SWAB32(usb1->fs_cgsize));
130 printk(" fstodb: %u\n", SWAB32(usb1->fs_fsbtodb));
131 printk(" contigsumsize: %d\n", SWAB32(usb3->fs_u2.fs_44.fs_contigsumsize));
132 printk(" postblformat: %u\n", SWAB32(usb3->fs_postblformat));
133 printk(" nrpos: %u\n", SWAB32(usb3->fs_nrpos));
134 printk(" ndir %u\n", SWAB32(usb1->fs_cstotal.cs_ndir));
135 printk(" nifree %u\n", SWAB32(usb1->fs_cstotal.cs_nifree));
136 printk(" nbfree %u\n", SWAB32(usb1->fs_cstotal.cs_nbfree));
137 printk(" nffree %u\n", SWAB32(usb1->fs_cstotal.cs_nffree));
138 printk("\n");
139 }
140
141
142 /*
143 * Print contents of ufs_cylinder_group, useful for debugging
144 */
145 void ufs_print_cylinder_stuff(struct ufs_cylinder_group *cg, unsigned swab)
146 {
147 printk("\nufs_print_cylinder_stuff\n");
148 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
149 printk(" magic: %x\n", SWAB32(cg->cg_magic));
150 printk(" time: %u\n", SWAB32(cg->cg_time));
151 printk(" cgx: %u\n", SWAB32(cg->cg_cgx));
152 printk(" ncyl: %u\n", SWAB16(cg->cg_ncyl));
153 printk(" niblk: %u\n", SWAB16(cg->cg_niblk));
154 printk(" ndblk: %u\n", SWAB32(cg->cg_ndblk));
155 printk(" cs_ndir: %u\n", SWAB32(cg->cg_cs.cs_ndir));
156 printk(" cs_nbfree: %u\n", SWAB32(cg->cg_cs.cs_nbfree));
157 printk(" cs_nifree: %u\n", SWAB32(cg->cg_cs.cs_nifree));
158 printk(" cs_nffree: %u\n", SWAB32(cg->cg_cs.cs_nffree));
159 printk(" rotor: %u\n", SWAB32(cg->cg_rotor));
160 printk(" frotor: %u\n", SWAB32(cg->cg_frotor));
161 printk(" irotor: %u\n", SWAB32(cg->cg_irotor));
162 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
163 SWAB32(cg->cg_frsum[0]), SWAB32(cg->cg_frsum[1]),
164 SWAB32(cg->cg_frsum[2]), SWAB32(cg->cg_frsum[3]),
165 SWAB32(cg->cg_frsum[4]), SWAB32(cg->cg_frsum[5]),
166 SWAB32(cg->cg_frsum[6]), SWAB32(cg->cg_frsum[7]));
167 printk(" btotoff: %u\n", SWAB32(cg->cg_btotoff));
168 printk(" boff: %u\n", SWAB32(cg->cg_boff));
169 printk(" iuseoff: %u\n", SWAB32(cg->cg_iusedoff));
170 printk(" freeoff: %u\n", SWAB32(cg->cg_freeoff));
171 printk(" nextfreeoff: %u\n", SWAB32(cg->cg_nextfreeoff));
172 printk(" clustersumoff %u\n", SWAB32(cg->cg_u.cg_44.cg_clustersumoff));
173 printk(" clusteroff %u\n", SWAB32(cg->cg_u.cg_44.cg_clusteroff));
174 printk(" nclusterblks %u\n", SWAB32(cg->cg_u.cg_44.cg_nclusterblks));
175 printk("\n");
176 }
177 #endif /* UFS_SUPER_DEBUG_MORE */
178
179 static struct super_operations ufs_super_ops;
180
181 static char error_buf[1024];
182
183 void ufs_error (struct super_block * sb, const char * function,
184 const char * fmt, ...)
185 {
186 struct ufs_sb_private_info * uspi;
187 struct ufs_super_block_first * usb1;
188 va_list args;
189
190 uspi = sb->u.ufs_sb.s_uspi;
191 usb1 = ubh_get_usb_first(USPI_UBH);
192
193 if (!(sb->s_flags & MS_RDONLY)) {
194 usb1->fs_clean = UFS_FSBAD;
195 ubh_mark_buffer_dirty(USPI_UBH);
196 sb->s_dirt = 1;
197 sb->s_flags |= MS_RDONLY;
198 }
199 va_start (args, fmt);
200 vsprintf (error_buf, fmt, args);
201 va_end (args);
202 switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_ONERROR) {
203 case UFS_MOUNT_ONERROR_PANIC:
204 panic ("UFS-fs panic (device %s): %s: %s\n",
205 kdevname(sb->s_dev), function, error_buf);
206
207 case UFS_MOUNT_ONERROR_LOCK:
208 case UFS_MOUNT_ONERROR_UMOUNT:
209 case UFS_MOUNT_ONERROR_REPAIR:
210 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
211 kdevname(sb->s_dev), function, error_buf);
212 }
213 }
214
215 void ufs_panic (struct super_block * sb, const char * function,
216 const char * fmt, ...)
217 {
218 struct ufs_sb_private_info * uspi;
219 struct ufs_super_block_first * usb1;
220 va_list args;
221
222 uspi = sb->u.ufs_sb.s_uspi;
223 usb1 = ubh_get_usb_first(USPI_UBH);
224
225 if (!(sb->s_flags & MS_RDONLY)) {
226 usb1->fs_clean = UFS_FSBAD;
227 ubh_mark_buffer_dirty(USPI_UBH);
228 sb->s_dirt = 1;
229 }
230 va_start (args, fmt);
231 vsprintf (error_buf, fmt, args);
232 va_end (args);
233 /* this is to prevent panic from syncing this filesystem */
234 if (sb->s_lock)
235 sb->s_lock = 0;
236 sb->s_flags |= MS_RDONLY;
237 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
238 kdevname(sb->s_dev), function, error_buf);
239 }
240
241 void ufs_warning (struct super_block * sb, const char * function,
242 const char * fmt, ...)
243 {
244 va_list args;
245
246 va_start (args, fmt);
247 vsprintf (error_buf, fmt, args);
248 va_end (args);
249 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
250 kdevname(sb->s_dev), function, error_buf);
251 }
252
253 static int ufs_parse_options (char * options, unsigned * mount_options)
254 {
255 char * this_char;
256 char * value;
257
258 UFSD(("ENTER\n"))
259
260 if (!options)
261 return 1;
262
263 for (this_char = strtok (options, ",");
264 this_char != NULL;
265 this_char = strtok (NULL, ",")) {
266
267 if ((value = strchr (this_char, '=')) != NULL)
268 *value++ = 0;
269 if (!strcmp (this_char, "ufstype")) {
270 ufs_clear_opt (*mount_options, UFSTYPE);
271 if (!strcmp (value, "old"))
272 ufs_set_opt (*mount_options, UFSTYPE_OLD);
273 else if (!strcmp (value, "sun"))
274 ufs_set_opt (*mount_options, UFSTYPE_SUN);
275 else if (!strcmp (value, "44bsd"))
276 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
277 else if (!strcmp (value, "nextstep"))
278 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
279 else if (!strcmp (value, "nextstep-cd"))
280 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
281 else if (!strcmp (value, "openstep"))
282 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
283 else if (!strcmp (value, "sunx86"))
284 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
285 else if (!strcmp (value, "hp"))
286 ufs_set_opt (*mount_options, UFSTYPE_HP);
287 else {
288 printk ("UFS-fs: Invalid type option: %s\n", value);
289 return 0;
290 }
291 }
292 else if (!strcmp (this_char, "onerror")) {
293 ufs_clear_opt (*mount_options, ONERROR);
294 if (!strcmp (value, "panic"))
295 ufs_set_opt (*mount_options, ONERROR_PANIC);
296 else if (!strcmp (value, "lock"))
297 ufs_set_opt (*mount_options, ONERROR_LOCK);
298 else if (!strcmp (value, "umount"))
299 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
300 else if (!strcmp (value, "repair")) {
301 printk("UFS-fs: Unable to do repair on error, "
302 "will lock lock instead \n");
303 ufs_set_opt (*mount_options, ONERROR_REPAIR);
304 }
305 else {
306 printk ("UFS-fs: Invalid action onerror: %s\n", value);
307 return 0;
308 }
309 }
310 else {
311 printk("UFS-fs: Invalid option: %s\n", this_char);
312 return 0;
313 }
314 }
315 return 1;
316 }
317
318 /*
319 * Read on-disk structures associated with cylinder groups
320 */
321 int ufs_read_cylinder_structures (struct super_block * sb) {
322 struct ufs_sb_private_info * uspi;
323 struct ufs_buffer_head * ubh;
324 unsigned char * base, * space;
325 unsigned size, blks, i;
326 unsigned swab;
327
328 UFSD(("ENTER\n"))
329
330 uspi = sb->u.ufs_sb.s_uspi;
331 swab = sb->u.ufs_sb.s_swab;
332
333 /*
334 * Read cs structures from (usually) first data block
335 * on the device.
336 */
337 size = uspi->s_cssize;
338 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
339 base = space = kmalloc(size, GFP_KERNEL);
340 if (!base)
341 goto failed;
342 for (i = 0; i < blks; i += uspi->s_fpb) {
343 size = uspi->s_bsize;
344 if (i + uspi->s_fpb > blks)
345 size = (blks - i) * uspi->s_fsize;
346 ubh = ubh_bread(sb->s_dev, uspi->s_csaddr + i, size);
347 if (!ubh)
348 goto failed;
349 ubh_ubhcpymem (space, ubh, size);
350 sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space;
351 space += size;
352 ubh_brelse (ubh);
353 ubh = NULL;
354 }
355
356 /*
357 * Read cylinder group (we read only first fragment from block
358 * at this time) and prepare internal data structures for cg caching.
359 */
360 if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
361 goto failed;
362 for (i = 0; i < uspi->s_ncg; i++)
363 sb->u.ufs_sb.s_ucg[i] = NULL;
364 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
365 sb->u.ufs_sb.s_ucpi[i] = NULL;
366 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
367 }
368 for (i = 0; i < uspi->s_ncg; i++) {
369 UFSD(("read cg %u\n", i))
370 if (!(sb->u.ufs_sb.s_ucg[i] = bread (sb->s_dev, ufs_cgcmin(i), sb->s_blocksize)))
371 goto failed;
372 if (!ufs_cg_chkmagic ((struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data))
373 goto failed;
374 #ifdef UFS_SUPER_DEBUG_MORE
375 ufs_print_cylinder_stuff((struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data, swab);
376 #endif
377 }
378 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
379 if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
380 goto failed;
381 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
382 }
383 sb->u.ufs_sb.s_cg_loaded = 0;
384 UFSD(("EXIT\n"))
385 return 1;
386
387 failed:
388 if (base) kfree (base);
389 if (sb->u.ufs_sb.s_ucg) {
390 for (i = 0; i < uspi->s_ncg; i++)
391 if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]);
392 kfree (sb->u.ufs_sb.s_ucg);
393 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
394 if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]);
395 }
396 UFSD(("EXIT (FAILED)\n"))
397 return 0;
398 }
399
400 /*
401 * Put on-disk structures associated with cylinder groups and
402 * write them back to disk
403 */
404 void ufs_put_cylinder_structures (struct super_block * sb) {
405 struct ufs_sb_private_info * uspi;
406 struct ufs_buffer_head * ubh;
407 unsigned char * base, * space;
408 unsigned blks, size, i;
409
410 UFSD(("ENTER\n"))
411
412 uspi = sb->u.ufs_sb.s_uspi;
413
414 size = uspi->s_cssize;
415 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
416 base = space = (char*) sb->u.ufs_sb.s_csp[0];
417 for (i = 0; i < blks; i += uspi->s_fpb) {
418 size = uspi->s_bsize;
419 if (i + uspi->s_fpb > blks)
420 size = (blks - i) * uspi->s_fsize;
421 ubh = ubh_bread (sb->s_dev, uspi->s_csaddr + i, size);
422 ubh_memcpyubh (ubh, space, size);
423 space += size;
424 ubh_mark_buffer_uptodate (ubh, 1);
425 ubh_mark_buffer_dirty (ubh);
426 ubh_brelse (ubh);
427 }
428 for (i = 0; i < sb->u.ufs_sb.s_cg_loaded; i++) {
429 ufs_put_cylinder (sb, i);
430 kfree (sb->u.ufs_sb.s_ucpi[i]);
431 }
432 for (; i < UFS_MAX_GROUP_LOADED; i++)
433 kfree (sb->u.ufs_sb.s_ucpi[i]);
434 for (i = 0; i < uspi->s_ncg; i++)
435 brelse (sb->u.ufs_sb.s_ucg[i]);
436 kfree (sb->u.ufs_sb.s_ucg);
437 kfree (base);
438 UFSD(("EXIT\n"))
439 }
440
441 struct super_block * ufs_read_super (struct super_block * sb, void * data,
442 int silent)
443 {
444 struct ufs_sb_private_info * uspi;
445 struct ufs_super_block_first * usb1;
446 struct ufs_super_block_second * usb2;
447 struct ufs_super_block_third * usb3;
448 struct ufs_buffer_head * ubh;
449 unsigned block_size, super_block_size;
450 unsigned flags, swab;
451
452 uspi = NULL;
453 ubh = NULL;
454 flags = 0;
455 swab = 0;
456
457 UFSD(("ENTER\n"))
458
459 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
460
461 #ifndef CONFIG_UFS_FS_WRITE
462 if (!(sb->s_flags & MS_RDONLY)) {
463 printk("ufs was compiled with read-only support, "
464 "can't be mounted as read-write\n");
465 goto failed;
466 }
467 #endif
468 /*
469 * Set default mount options
470 * Parse mount options
471 */
472 sb->u.ufs_sb.s_mount_opt = 0;
473 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK);
474 if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) {
475 printk("wrong mount options\n");
476 goto failed;
477 }
478 if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) {
479 printk("You didn't specify the type of your ufs filesystem\n\n"
480 "mount -t ufs -o ufstype="
481 "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
482 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
483 "default is ufstype=old\n");
484 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD);
485 }
486
487 sb->u.ufs_sb.s_uspi = uspi =
488 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
489 if (!uspi)
490 goto failed;
491
492 switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) {
493 case UFS_MOUNT_UFSTYPE_44BSD:
494 UFSD(("ufstype=44bsd\n"))
495 uspi->s_fsize = block_size = 512;
496 uspi->s_fmask = ~(512 - 1);
497 uspi->s_fshift = 9;
498 uspi->s_sbsize = super_block_size = 1536;
499 uspi->s_sbbase = 0;
500 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
501 break;
502
503 case UFS_MOUNT_UFSTYPE_SUN:
504 UFSD(("ufstype=sun\n"))
505 uspi->s_fsize = block_size = 1024;
506 uspi->s_fmask = ~(1024 - 1);
507 uspi->s_fshift = 10;
508 uspi->s_sbsize = super_block_size = 2048;
509 uspi->s_sbbase = 0;
510 uspi->s_maxsymlinklen = 56;
511 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
512 break;
513
514 case UFS_MOUNT_UFSTYPE_SUNx86:
515 UFSD(("ufstype=sunx86\n"))
516 uspi->s_fsize = block_size = 1024;
517 uspi->s_fmask = ~(1024 - 1);
518 uspi->s_fshift = 10;
519 uspi->s_sbsize = super_block_size = 2048;
520 uspi->s_sbbase = 0;
521 uspi->s_maxsymlinklen = 56;
522 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
523 break;
524
525 case UFS_MOUNT_UFSTYPE_OLD:
526 UFSD(("ufstype=old\n"))
527 uspi->s_fsize = block_size = 1024;
528 uspi->s_fmask = ~(1024 - 1);
529 uspi->s_fshift = 10;
530 uspi->s_sbsize = super_block_size = 2048;
531 uspi->s_sbbase = 0;
532 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
533 if (!(sb->s_flags & MS_RDONLY)) {
534 printk(KERN_INFO "ufstype=old is supported read-only\n");
535 sb->s_flags |= MS_RDONLY;
536 }
537 break;
538
539 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
540 UFSD(("ufstype=nextstep\n"))
541 uspi->s_fsize = block_size = 1024;
542 uspi->s_fmask = ~(1024 - 1);
543 uspi->s_fshift = 10;
544 uspi->s_sbsize = super_block_size = 2048;
545 uspi->s_sbbase = 0;
546 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
547 if (!(sb->s_flags & MS_RDONLY)) {
548 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
549 sb->s_flags |= MS_RDONLY;
550 }
551 break;
552
553 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
554 UFSD(("ufstype=nextstep-cd\n"))
555 uspi->s_fsize = block_size = 2048;
556 uspi->s_fmask = ~(2048 - 1);
557 uspi->s_fshift = 11;
558 uspi->s_sbsize = super_block_size = 2048;
559 uspi->s_sbbase = 0;
560 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
561 if (!(sb->s_flags & MS_RDONLY)) {
562 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
563 sb->s_flags |= MS_RDONLY;
564 }
565 break;
566
567 case UFS_MOUNT_UFSTYPE_OPENSTEP:
568 UFSD(("ufstype=openstep\n"))
569 uspi->s_fsize = block_size = 1024;
570 uspi->s_fmask = ~(1024 - 1);
571 uspi->s_fshift = 10;
572 uspi->s_sbsize = super_block_size = 2048;
573 uspi->s_sbbase = 0;
574 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
575 if (!(sb->s_flags & MS_RDONLY)) {
576 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
577 sb->s_flags |= MS_RDONLY;
578 }
579 break;
580
581 case UFS_MOUNT_UFSTYPE_HP:
582 UFSD(("ufstype=hp\n"))
583 uspi->s_fsize = block_size = 1024;
584 uspi->s_fmask = ~(1024 - 1);
585 uspi->s_fshift = 10;
586 uspi->s_sbsize = super_block_size = 2048;
587 uspi->s_sbbase = 0;
588 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
589 if (!(sb->s_flags & MS_RDONLY)) {
590 printk(KERN_INFO "ufstype=hp is supported read-only\n");
591 sb->s_flags |= MS_RDONLY;
592 }
593 break;
594 default:
595 printk("unknown ufstype\n");
596 goto failed;
597 }
598
599 again:
600 set_blocksize (sb->s_dev, block_size);
601
602 /*
603 * read ufs super block from device
604 */
605 ubh = ubh_bread_uspi (uspi, sb->s_dev, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
606 if (!ubh)
607 goto failed;
608
609 usb1 = ubh_get_usb_first(USPI_UBH);
610 usb2 = ubh_get_usb_second(USPI_UBH);
611 usb3 = ubh_get_usb_third(USPI_UBH);
612
613 /*
614 * Check ufs magic number
615 */
616 #if defined(__LITTLE_ENDIAN) || defined(__BIG_ENDIAN) /* sane bytesex */
617 switch (usb3->fs_magic) {
618 case UFS_MAGIC:
619 case UFS_MAGIC_LFN:
620 case UFS_MAGIC_FEA:
621 case UFS_MAGIC_4GB:
622 swab = UFS_NATIVE_ENDIAN;
623 goto magic_found;
624 case UFS_CIGAM:
625 case UFS_CIGAM_LFN:
626 case UFS_CIGAM_FEA:
627 case UFS_CIGAM_4GB:
628 swab = UFS_SWABBED_ENDIAN;
629 goto magic_found;
630 }
631 #else /* bytesex perversion */
632 switch (le32_to_cpup(&usb3->fs_magic)) {
633 case UFS_MAGIC:
634 case UFS_MAGIC_LFN:
635 case UFS_MAGIC_FEA:
636 case UFS_MAGIC_4GB:
637 swab = UFS_LITTLE_ENDIAN;
638 goto magic_found;
639 case UFS_CIGAM:
640 case UFS_CIGAM_LFN:
641 case UFS_CIGAM_FEA:
642 case UFS_CIGAM_4GB:
643 swab = UFS_BIG_ENDIAN;
644 goto magic_found;
645 }
646 #endif
647
648 if ((((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
649 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
650 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
651 && uspi->s_sbbase < 256) {
652 ubh_brelse_uspi(uspi);
653 ubh = NULL;
654 uspi->s_sbbase += 8;
655 goto again;
656 }
657 printk("ufs_read_super: bad magic number\n");
658 goto failed;
659
660 magic_found:
661 /*
662 * Check block and fragment sizes
663 */
664 uspi->s_bsize = SWAB32(usb1->fs_bsize);
665 uspi->s_fsize = SWAB32(usb1->fs_fsize);
666 uspi->s_sbsize = SWAB32(usb1->fs_sbsize);
667 uspi->s_fmask = SWAB32(usb1->fs_fmask);
668 uspi->s_fshift = SWAB32(usb1->fs_fshift);
669
670 if (uspi->s_bsize != 4096 && uspi->s_bsize != 8192
671 && uspi->s_bsize != 32768) {
672 printk("ufs_read_super: fs_bsize %u != {4096, 8192, 32768}\n", uspi->s_bsize);
673 goto failed;
674 }
675 if (uspi->s_fsize != 512 && uspi->s_fsize != 1024
676 && uspi->s_fsize != 2048 && uspi->s_fsize != 4096) {
677 printk("ufs_read_super: fs_fsize %u != {512, 1024, 2048. 4096}\n", uspi->s_fsize);
678 goto failed;
679 }
680 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
681 ubh_brelse_uspi(uspi);
682 ubh = NULL;
683 block_size = uspi->s_fsize;
684 super_block_size = uspi->s_sbsize;
685 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
686 goto again;
687 }
688
689 #ifdef UFS_SUPER_DEBUG_MORE
690 ufs_print_super_stuff (usb1, usb2, usb3, swab);
691 #endif
692
693 /*
694 * Check, if file system was correctly unmounted.
695 * If not, make it read only.
696 */
697 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
698 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
699 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
700 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
701 (ufs_get_fs_state(usb1, usb3) == (UFS_FSOK - SWAB32(usb1->fs_time))))) {
702 switch(usb1->fs_clean) {
703 case UFS_FSCLEAN:
704 UFSD(("fs is clean\n"))
705 break;
706 case UFS_FSSTABLE:
707 UFSD(("fs is stable\n"))
708 break;
709 case UFS_FSOSF1:
710 UFSD(("fs is DEC OSF/1\n"))
711 break;
712 case UFS_FSACTIVE:
713 printk("ufs_read_super: fs is active\n");
714 sb->s_flags |= MS_RDONLY;
715 break;
716 case UFS_FSBAD:
717 printk("ufs_read_super: fs is bad\n");
718 sb->s_flags |= MS_RDONLY;
719 break;
720 default:
721 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
722 sb->s_flags |= MS_RDONLY;
723 break;
724 }
725 }
726 else {
727 printk("ufs_read_super: fs needs fsck\n");
728 sb->s_flags |= MS_RDONLY;
729 }
730
731 /*
732 * Read ufs_super_block into internal data structures
733 */
734 sb->s_blocksize = SWAB32(usb1->fs_fsize);
735 sb->s_blocksize_bits = SWAB32(usb1->fs_fshift);
736 sb->s_op = &ufs_super_ops;
737 sb->dq_op = NULL; /***/
738 sb->s_magic = SWAB32(usb3->fs_magic);
739
740 uspi->s_sblkno = SWAB32(usb1->fs_sblkno);
741 uspi->s_cblkno = SWAB32(usb1->fs_cblkno);
742 uspi->s_iblkno = SWAB32(usb1->fs_iblkno);
743 uspi->s_dblkno = SWAB32(usb1->fs_dblkno);
744 uspi->s_cgoffset = SWAB32(usb1->fs_cgoffset);
745 uspi->s_cgmask = SWAB32(usb1->fs_cgmask);
746 uspi->s_size = SWAB32(usb1->fs_size);
747 uspi->s_dsize = SWAB32(usb1->fs_dsize);
748 uspi->s_ncg = SWAB32(usb1->fs_ncg);
749 /* s_bsize already set */
750 /* s_fsize already set */
751 uspi->s_fpb = SWAB32(usb1->fs_frag);
752 uspi->s_minfree = SWAB32(usb1->fs_minfree);
753 uspi->s_bmask = SWAB32(usb1->fs_bmask);
754 uspi->s_fmask = SWAB32(usb1->fs_fmask);
755 uspi->s_bshift = SWAB32(usb1->fs_bshift);
756 uspi->s_fshift = SWAB32(usb1->fs_fshift);
757 uspi->s_fpbshift = SWAB32(usb1->fs_fragshift);
758 uspi->s_fsbtodb = SWAB32(usb1->fs_fsbtodb);
759 /* s_sbsize already set */
760 uspi->s_csmask = SWAB32(usb1->fs_csmask);
761 uspi->s_csshift = SWAB32(usb1->fs_csshift);
762 uspi->s_nindir = SWAB32(usb1->fs_nindir);
763 uspi->s_inopb = SWAB32(usb1->fs_inopb);
764 uspi->s_nspf = SWAB32(usb1->fs_nspf);
765 uspi->s_npsect = ufs_get_fs_npsect(usb1, usb3);
766 uspi->s_interleave = SWAB32(usb1->fs_interleave);
767 uspi->s_trackskew = SWAB32(usb1->fs_trackskew);
768 uspi->s_csaddr = SWAB32(usb1->fs_csaddr);
769 uspi->s_cssize = SWAB32(usb1->fs_cssize);
770 uspi->s_cgsize = SWAB32(usb1->fs_cgsize);
771 uspi->s_ntrak = SWAB32(usb1->fs_ntrak);
772 uspi->s_nsect = SWAB32(usb1->fs_nsect);
773 uspi->s_spc = SWAB32(usb1->fs_spc);
774 uspi->s_ipg = SWAB32(usb1->fs_ipg);
775 uspi->s_fpg = SWAB32(usb1->fs_fpg);
776 uspi->s_cpc = SWAB32(usb2->fs_cpc);
777 uspi->s_contigsumsize = SWAB32(usb3->fs_u2.fs_44.fs_contigsumsize);
778 uspi->s_qbmask = ufs_get_fs_qbmask(usb3);
779 uspi->s_qfmask = ufs_get_fs_qfmask(usb3);
780 uspi->s_postblformat = SWAB32(usb3->fs_postblformat);
781 uspi->s_nrpos = SWAB32(usb3->fs_nrpos);
782 uspi->s_postbloff = SWAB32(usb3->fs_postbloff);
783 uspi->s_rotbloff = SWAB32(usb3->fs_rotbloff);
784
785 /*
786 * Compute another frequently used values
787 */
788 uspi->s_fpbmask = uspi->s_fpb - 1;
789 uspi->s_apbshift = uspi->s_bshift - 2;
790 uspi->s_2apbshift = uspi->s_apbshift * 2;
791 uspi->s_3apbshift = uspi->s_apbshift * 3;
792 uspi->s_apb = 1 << uspi->s_apbshift;
793 uspi->s_2apb = 1 << uspi->s_2apbshift;
794 uspi->s_3apb = 1 << uspi->s_3apbshift;
795 uspi->s_apbmask = uspi->s_apb - 1;
796 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
797 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
798 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
799 uspi->s_bpf = uspi->s_fsize << 3;
800 uspi->s_bpfshift = uspi->s_fshift + 3;
801 uspi->s_bpfmask = uspi->s_bpf - 1;
802 if ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) ==
803 UFS_MOUNT_UFSTYPE_44BSD)
804 uspi->s_maxsymlinklen =
805 SWAB32(usb3->fs_u2.fs_44.fs_maxsymlinklen);
806
807 sb->u.ufs_sb.s_flags = flags;
808 sb->u.ufs_sb.s_swab = swab;
809
810 sb->s_root = d_alloc_root(iget(sb, UFS_ROOTINO));
811
812
813 /*
814 * Read cylinder group structures
815 */
816 if (!(sb->s_flags & MS_RDONLY))
817 if (!ufs_read_cylinder_structures(sb))
818 goto failed;
819
820 UFSD(("EXIT\n"))
821 return(sb);
822
823 failed:
824 if (ubh) ubh_brelse_uspi (uspi);
825 if (uspi) kfree (uspi);
826 UFSD(("EXIT (FAILED)\n"))
827 return(NULL);
828 }
829
830 void ufs_write_super (struct super_block * sb) {
831 struct ufs_sb_private_info * uspi;
832 struct ufs_super_block_first * usb1;
833 struct ufs_super_block_third * usb3;
834 unsigned flags, swab;
835
836 UFSD(("ENTER\n"))
837 swab = sb->u.ufs_sb.s_swab;
838 flags = sb->u.ufs_sb.s_flags;
839 uspi = sb->u.ufs_sb.s_uspi;
840 usb1 = ubh_get_usb_first(USPI_UBH);
841 usb3 = ubh_get_usb_third(USPI_UBH);
842
843 if (!(sb->s_flags & MS_RDONLY)) {
844 usb1->fs_time = SWAB32(CURRENT_TIME);
845 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
846 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
847 ufs_set_fs_state(usb1, usb3, UFS_FSOK - SWAB32(usb1->fs_time));
848 ubh_mark_buffer_dirty (USPI_UBH);
849 }
850 sb->s_dirt = 0;
851 UFSD(("EXIT\n"))
852 }
853
854 void ufs_put_super (struct super_block * sb)
855 {
856 struct ufs_sb_private_info * uspi;
857 unsigned swab;
858
859 UFSD(("ENTER\n"))
860
861 uspi = sb->u.ufs_sb.s_uspi;
862 swab = sb->u.ufs_sb.s_swab;
863
864 if (!(sb->s_flags & MS_RDONLY))
865 ufs_put_cylinder_structures (sb);
866
867 ubh_brelse_uspi (uspi);
868 kfree (sb->u.ufs_sb.s_uspi);
869 return;
870 }
871
872
873 int ufs_remount (struct super_block * sb, int * mount_flags, char * data)
874 {
875 struct ufs_sb_private_info * uspi;
876 struct ufs_super_block_first * usb1;
877 struct ufs_super_block_third * usb3;
878 unsigned new_mount_opt, ufstype;
879 unsigned flags, swab;
880
881 uspi = sb->u.ufs_sb.s_uspi;
882 flags = sb->u.ufs_sb.s_flags;
883 swab = sb->u.ufs_sb.s_swab;
884 usb1 = ubh_get_usb_first(USPI_UBH);
885 usb3 = ubh_get_usb_third(USPI_UBH);
886
887 /*
888 * Allow the "check" option to be passed as a remount option.
889 * It is not possible to change ufstype option during remount
890 */
891 ufstype = sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE;
892 new_mount_opt = 0;
893 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
894 if (!ufs_parse_options (data, &new_mount_opt))
895 return -EINVAL;
896 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
897 new_mount_opt |= ufstype;
898 }
899 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
900 printk("ufstype can't be changed during remount\n");
901 return -EINVAL;
902 }
903
904 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
905 sb->u.ufs_sb.s_mount_opt = new_mount_opt;
906 return 0;
907 }
908
909 /*
910 * fs was mouted as rw, remounting ro
911 */
912 if (*mount_flags & MS_RDONLY) {
913 ufs_put_cylinder_structures(sb);
914 usb1->fs_time = SWAB32(CURRENT_TIME);
915 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
916 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
917 ufs_set_fs_state(usb1, usb3, UFS_FSOK - SWAB32(usb1->fs_time));
918 ubh_mark_buffer_dirty (USPI_UBH);
919 sb->s_dirt = 0;
920 sb->s_flags |= MS_RDONLY;
921 }
922 /*
923 * fs was mounted as ro, remounting rw
924 */
925 else {
926 #ifndef CONFIG_UFS_FS_WRITE
927 printk("ufs was compiled with read-only support, "
928 "can't be mounted as read-write\n");
929 return -EINVAL;
930 #else
931 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
932 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
933 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
934 printk("this ufstype is read-only supported\n");
935 return -EINVAL;
936 }
937 if (!ufs_read_cylinder_structures (sb)) {
938 printk("failed during remounting\n");
939 return -EPERM;
940 }
941 sb->s_flags &= ~MS_RDONLY;
942 #endif
943 }
944 sb->u.ufs_sb.s_mount_opt = new_mount_opt;
945 return 0;
946 }
947
948 int ufs_statfs (struct super_block * sb, struct statfs * buf)
949 {
950 struct ufs_sb_private_info * uspi;
951 struct ufs_super_block_first * usb1;
952 unsigned swab;
953
954 swab = sb->u.ufs_sb.s_swab;
955 uspi = sb->u.ufs_sb.s_uspi;
956 usb1 = ubh_get_usb_first (USPI_UBH);
957
958 buf->f_type = UFS_MAGIC;
959 buf->f_bsize = sb->s_blocksize;
960 buf->f_blocks = uspi->s_dsize;
961 buf->f_bfree = ufs_blkstofrags(SWAB32(usb1->fs_cstotal.cs_nbfree)) +
962 SWAB32(usb1->fs_cstotal.cs_nffree);
963 buf->f_bavail = (buf->f_bfree > ((buf->f_blocks / 100) * uspi->s_minfree))
964 ? (buf->f_bfree - ((buf->f_blocks / 100) * uspi->s_minfree)) : 0;
965 buf->f_files = uspi->s_ncg * uspi->s_ipg;
966 buf->f_ffree = SWAB32(usb1->fs_cstotal.cs_nifree);
967 buf->f_namelen = UFS_MAXNAMLEN;
968 return 0;
969 }
970
971 static struct super_operations ufs_super_ops = {
972 read_inode: ufs_read_inode,
973 write_inode: ufs_write_inode,
974 delete_inode: ufs_delete_inode,
975 put_super: ufs_put_super,
976 write_super: ufs_write_super,
977 statfs: ufs_statfs,
978 remount_fs: ufs_remount,
979 };
980
981 static DECLARE_FSTYPE_DEV(ufs_fs_type, "ufs", ufs_read_super);
982
983 static int __init init_ufs_fs(void)
984 {
985 return register_filesystem(&ufs_fs_type);
986 }
987
988 static void __exit exit_ufs_fs(void)
989 {
990 unregister_filesystem(&ufs_fs_type);
991 }
992
993 EXPORT_NO_SYMBOLS;
994
995 module_init(init_ufs_fs)
996 module_exit(exit_ufs_fs)
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