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/slab.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 */
ufs_print_super_stuff(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_second * usb2,struct ufs_super_block_third * usb3)100 void ufs_print_super_stuff(struct super_block *sb,
101 struct ufs_super_block_first * usb1,
102 struct ufs_super_block_second * usb2,
103 struct ufs_super_block_third * usb3)
104 {
105 printk("ufs_print_super_stuff\n");
106 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
107 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
108 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
109 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
110 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
111 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
112 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
113 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
114 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
115 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
116 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
117 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
118 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
119 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
120 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
121 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
122 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
123 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
124 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
125 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
126 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
127 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
128 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
129 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
130 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
131 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
132 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
133 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
134 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
135 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
136 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
137 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
138 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
139 printk("\n");
140 }
141
142
143 /*
144 * Print contents of ufs_cylinder_group, useful for debugging
145 */
ufs_print_cylinder_stuff(struct super_block * sb,struct ufs_cylinder_group * cg)146 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
147 {
148 printk("\nufs_print_cylinder_stuff\n");
149 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
150 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
151 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
152 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
153 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
154 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
155 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
156 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
157 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
158 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
159 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
160 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
161 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
162 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
163 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
164 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
165 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
166 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
167 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
168 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
169 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
170 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
171 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
172 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
173 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
174 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
175 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
176 printk("\n");
177 }
178 #endif /* UFS_SUPER_DEBUG_MORE */
179
180 static struct super_operations ufs_super_ops;
181
182 static char error_buf[1024];
183
ufs_error(struct super_block * sb,const char * function,const char * fmt,...)184 void ufs_error (struct super_block * sb, const char * function,
185 const char * fmt, ...)
186 {
187 struct ufs_sb_private_info * uspi;
188 struct ufs_super_block_first * usb1;
189 va_list args;
190
191 uspi = sb->u.ufs_sb.s_uspi;
192 usb1 = ubh_get_usb_first(USPI_UBH);
193
194 if (!(sb->s_flags & MS_RDONLY)) {
195 usb1->fs_clean = UFS_FSBAD;
196 ubh_mark_buffer_dirty(USPI_UBH);
197 sb->s_dirt = 1;
198 sb->s_flags |= MS_RDONLY;
199 }
200 va_start (args, fmt);
201 vsprintf (error_buf, fmt, args);
202 va_end (args);
203 switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_ONERROR) {
204 case UFS_MOUNT_ONERROR_PANIC:
205 panic ("UFS-fs panic (device %s): %s: %s\n",
206 kdevname(sb->s_dev), function, error_buf);
207
208 case UFS_MOUNT_ONERROR_LOCK:
209 case UFS_MOUNT_ONERROR_UMOUNT:
210 case UFS_MOUNT_ONERROR_REPAIR:
211 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
212 kdevname(sb->s_dev), function, error_buf);
213 }
214 }
215
ufs_panic(struct super_block * sb,const char * function,const char * fmt,...)216 void ufs_panic (struct super_block * sb, const char * function,
217 const char * fmt, ...)
218 {
219 struct ufs_sb_private_info * uspi;
220 struct ufs_super_block_first * usb1;
221 va_list args;
222
223 uspi = sb->u.ufs_sb.s_uspi;
224 usb1 = ubh_get_usb_first(USPI_UBH);
225
226 if (!(sb->s_flags & MS_RDONLY)) {
227 usb1->fs_clean = UFS_FSBAD;
228 ubh_mark_buffer_dirty(USPI_UBH);
229 sb->s_dirt = 1;
230 }
231 va_start (args, fmt);
232 vsprintf (error_buf, fmt, args);
233 va_end (args);
234 sb->s_flags |= MS_RDONLY;
235 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
236 kdevname(sb->s_dev), function, error_buf);
237 }
238
ufs_warning(struct super_block * sb,const char * function,const char * fmt,...)239 void ufs_warning (struct super_block * sb, const char * function,
240 const char * fmt, ...)
241 {
242 va_list args;
243
244 va_start (args, fmt);
245 vsprintf (error_buf, fmt, args);
246 va_end (args);
247 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
248 kdevname(sb->s_dev), function, error_buf);
249 }
250
ufs_parse_options(char * options,unsigned * mount_options)251 static int ufs_parse_options (char * options, unsigned * mount_options)
252 {
253 char * this_char;
254 char * value;
255
256 UFSD(("ENTER\n"))
257
258 if (!options)
259 return 1;
260
261 for (this_char = strtok (options, ",");
262 this_char != NULL;
263 this_char = strtok (NULL, ",")) {
264
265 if ((value = strchr (this_char, '=')) != NULL)
266 *value++ = 0;
267 if (!strcmp (this_char, "ufstype")) {
268 ufs_clear_opt (*mount_options, UFSTYPE);
269 if (!strcmp (value, "old"))
270 ufs_set_opt (*mount_options, UFSTYPE_OLD);
271 else if (!strcmp (value, "sun"))
272 ufs_set_opt (*mount_options, UFSTYPE_SUN);
273 else if (!strcmp (value, "44bsd"))
274 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
275 else if (!strcmp (value, "nextstep"))
276 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
277 else if (!strcmp (value, "nextstep-cd"))
278 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
279 else if (!strcmp (value, "openstep"))
280 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
281 else if (!strcmp (value, "sunx86"))
282 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
283 else if (!strcmp (value, "hp"))
284 ufs_set_opt (*mount_options, UFSTYPE_HP);
285 else {
286 printk ("UFS-fs: Invalid type option: %s\n", value);
287 return 0;
288 }
289 }
290 else if (!strcmp (this_char, "onerror")) {
291 ufs_clear_opt (*mount_options, ONERROR);
292 if (!strcmp (value, "panic"))
293 ufs_set_opt (*mount_options, ONERROR_PANIC);
294 else if (!strcmp (value, "lock"))
295 ufs_set_opt (*mount_options, ONERROR_LOCK);
296 else if (!strcmp (value, "umount"))
297 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
298 else if (!strcmp (value, "repair")) {
299 printk("UFS-fs: Unable to do repair on error, "
300 "will lock lock instead \n");
301 ufs_set_opt (*mount_options, ONERROR_REPAIR);
302 }
303 else {
304 printk ("UFS-fs: Invalid action onerror: %s\n", value);
305 return 0;
306 }
307 }
308 else {
309 printk("UFS-fs: Invalid option: %s\n", this_char);
310 return 0;
311 }
312 }
313 return 1;
314 }
315
316 /*
317 * Read on-disk structures associated with cylinder groups
318 */
ufs_read_cylinder_structures(struct super_block * sb)319 int ufs_read_cylinder_structures (struct super_block * sb) {
320 struct ufs_sb_private_info * uspi;
321 struct ufs_buffer_head * ubh;
322 unsigned char * base, * space;
323 unsigned size, blks, i;
324
325 UFSD(("ENTER\n"))
326
327 uspi = sb->u.ufs_sb.s_uspi;
328
329 /*
330 * Read cs structures from (usually) first data block
331 * on the device.
332 */
333 size = uspi->s_cssize;
334 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
335 base = space = kmalloc(size, GFP_KERNEL);
336 if (!base)
337 goto failed;
338 for (i = 0; i < blks; i += uspi->s_fpb) {
339 size = uspi->s_bsize;
340 if (i + uspi->s_fpb > blks)
341 size = (blks - i) * uspi->s_fsize;
342 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
343 if (!ubh)
344 goto failed;
345 ubh_ubhcpymem (space, ubh, size);
346 sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space;
347 space += size;
348 ubh_brelse (ubh);
349 ubh = NULL;
350 }
351
352 /*
353 * Read cylinder group (we read only first fragment from block
354 * at this time) and prepare internal data structures for cg caching.
355 */
356 if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
357 goto failed;
358 for (i = 0; i < uspi->s_ncg; i++)
359 sb->u.ufs_sb.s_ucg[i] = NULL;
360 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
361 sb->u.ufs_sb.s_ucpi[i] = NULL;
362 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
363 }
364 for (i = 0; i < uspi->s_ncg; i++) {
365 UFSD(("read cg %u\n", i))
366 if (!(sb->u.ufs_sb.s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
367 goto failed;
368 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data))
369 goto failed;
370 #ifdef UFS_SUPER_DEBUG_MORE
371 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data);
372 #endif
373 }
374 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
375 if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
376 goto failed;
377 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
378 }
379 sb->u.ufs_sb.s_cg_loaded = 0;
380 UFSD(("EXIT\n"))
381 return 1;
382
383 failed:
384 if (base) kfree (base);
385 if (sb->u.ufs_sb.s_ucg) {
386 for (i = 0; i < uspi->s_ncg; i++)
387 if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]);
388 kfree (sb->u.ufs_sb.s_ucg);
389 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
390 if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]);
391 }
392 UFSD(("EXIT (FAILED)\n"))
393 return 0;
394 }
395
396 /*
397 * Put on-disk structures associated with cylinder groups and
398 * write them back to disk
399 */
ufs_put_cylinder_structures(struct super_block * sb)400 void ufs_put_cylinder_structures (struct super_block * sb) {
401 struct ufs_sb_private_info * uspi;
402 struct ufs_buffer_head * ubh;
403 unsigned char * base, * space;
404 unsigned blks, size, i;
405
406 UFSD(("ENTER\n"))
407
408 uspi = sb->u.ufs_sb.s_uspi;
409
410 size = uspi->s_cssize;
411 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
412 base = space = (char*) sb->u.ufs_sb.s_csp[0];
413 for (i = 0; i < blks; i += uspi->s_fpb) {
414 size = uspi->s_bsize;
415 if (i + uspi->s_fpb > blks)
416 size = (blks - i) * uspi->s_fsize;
417 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
418 ubh_memcpyubh (ubh, space, size);
419 space += size;
420 ubh_mark_buffer_uptodate (ubh, 1);
421 ubh_mark_buffer_dirty (ubh);
422 ubh_brelse (ubh);
423 }
424 for (i = 0; i < sb->u.ufs_sb.s_cg_loaded; i++) {
425 ufs_put_cylinder (sb, i);
426 kfree (sb->u.ufs_sb.s_ucpi[i]);
427 }
428 for (; i < UFS_MAX_GROUP_LOADED; i++)
429 kfree (sb->u.ufs_sb.s_ucpi[i]);
430 for (i = 0; i < uspi->s_ncg; i++)
431 brelse (sb->u.ufs_sb.s_ucg[i]);
432 kfree (sb->u.ufs_sb.s_ucg);
433 kfree (base);
434 UFSD(("EXIT\n"))
435 }
436
ufs_read_super(struct super_block * sb,void * data,int silent)437 struct super_block * ufs_read_super (struct super_block * sb, void * data,
438 int silent)
439 {
440 struct ufs_sb_private_info * uspi;
441 struct ufs_super_block_first * usb1;
442 struct ufs_super_block_second * usb2;
443 struct ufs_super_block_third * usb3;
444 struct ufs_buffer_head * ubh;
445 struct inode *inode;
446 unsigned block_size, super_block_size;
447 unsigned flags;
448
449 uspi = NULL;
450 ubh = NULL;
451 flags = 0;
452
453 UFSD(("ENTER\n"))
454
455 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
456
457 #ifndef CONFIG_UFS_FS_WRITE
458 if (!(sb->s_flags & MS_RDONLY)) {
459 printk("ufs was compiled with read-only support, "
460 "can't be mounted as read-write\n");
461 goto failed;
462 }
463 #endif
464 /*
465 * Set default mount options
466 * Parse mount options
467 */
468 sb->u.ufs_sb.s_mount_opt = 0;
469 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK);
470 if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) {
471 printk("wrong mount options\n");
472 goto failed;
473 }
474 if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) {
475 printk("You didn't specify the type of your ufs filesystem\n\n"
476 "mount -t ufs -o ufstype="
477 "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
478 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
479 "default is ufstype=old\n");
480 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD);
481 }
482
483 sb->u.ufs_sb.s_uspi = uspi =
484 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
485 if (!uspi)
486 goto failed;
487
488 /* Keep 2Gig file limit. Some UFS variants need to override
489 this but as I don't know which I'll let those in the know loosen
490 the rules */
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 if (set_blocksize (sb->s_dev, block_size)) {
601 printk(KERN_ERR "UFS: failed to set blocksize\n");
602 goto failed;
603 }
604
605 sb->s_blocksize = block_size;
606
607 /*
608 * read ufs super block from device
609 */
610 ubh = ubh_bread_uspi (uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
611 if (!ubh)
612 goto failed;
613
614 usb1 = ubh_get_usb_first(USPI_UBH);
615 usb2 = ubh_get_usb_second(USPI_UBH);
616 usb3 = ubh_get_usb_third(USPI_UBH);
617
618 /*
619 * Check ufs magic number
620 */
621 switch (__constant_le32_to_cpu(usb3->fs_magic)) {
622 case UFS_MAGIC:
623 case UFS_MAGIC_LFN:
624 case UFS_MAGIC_FEA:
625 case UFS_MAGIC_4GB:
626 sb->u.ufs_sb.s_bytesex = BYTESEX_LE;
627 goto magic_found;
628 }
629 switch (__constant_be32_to_cpu(usb3->fs_magic)) {
630 case UFS_MAGIC:
631 case UFS_MAGIC_LFN:
632 case UFS_MAGIC_FEA:
633 case UFS_MAGIC_4GB:
634 sb->u.ufs_sb.s_bytesex = BYTESEX_BE;
635 goto magic_found;
636 }
637
638 if ((((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
639 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
640 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
641 && uspi->s_sbbase < 256) {
642 ubh_brelse_uspi(uspi);
643 ubh = NULL;
644 uspi->s_sbbase += 8;
645 goto again;
646 }
647 printk("ufs_read_super: bad magic number\n");
648 goto failed;
649
650 magic_found:
651 /*
652 * Check block and fragment sizes
653 */
654 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
655 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
656 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
657 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
658 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
659
660 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
661 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
662 uspi->s_fsize);
663 goto failed;
664 }
665 if (uspi->s_fsize < 512) {
666 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
667 uspi->s_fsize);
668 goto failed;
669 }
670 if (uspi->s_fsize > 4096) {
671 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
672 uspi->s_fsize);
673 goto failed;
674 }
675 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
676 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
677 uspi->s_bsize);
678 goto failed;
679 }
680 if (uspi->s_bsize < 4096) {
681 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
682 uspi->s_bsize);
683 goto failed;
684 }
685 if (uspi->s_bsize / uspi->s_fsize > 8) {
686 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
687 uspi->s_bsize / uspi->s_fsize);
688 goto failed;
689 }
690 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
691 ubh_brelse_uspi(uspi);
692 ubh = NULL;
693 block_size = uspi->s_fsize;
694 super_block_size = uspi->s_sbsize;
695 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
696 goto again;
697 }
698
699 #ifdef UFS_SUPER_DEBUG_MORE
700 ufs_print_super_stuff(sb, usb1, usb2, usb3);
701 #endif
702
703 /*
704 * Check, if file system was correctly unmounted.
705 * If not, make it read only.
706 */
707 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
708 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
709 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
710 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
711 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
712 switch(usb1->fs_clean) {
713 case UFS_FSCLEAN:
714 UFSD(("fs is clean\n"))
715 break;
716 case UFS_FSSTABLE:
717 UFSD(("fs is stable\n"))
718 break;
719 case UFS_FSOSF1:
720 UFSD(("fs is DEC OSF/1\n"))
721 break;
722 case UFS_FSACTIVE:
723 printk("ufs_read_super: fs is active\n");
724 sb->s_flags |= MS_RDONLY;
725 break;
726 case UFS_FSBAD:
727 printk("ufs_read_super: fs is bad\n");
728 sb->s_flags |= MS_RDONLY;
729 break;
730 default:
731 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
732 sb->s_flags |= MS_RDONLY;
733 break;
734 }
735 }
736 else {
737 printk("ufs_read_super: fs needs fsck\n");
738 sb->s_flags |= MS_RDONLY;
739 }
740
741 /*
742 * Read ufs_super_block into internal data structures
743 */
744 sb->s_blocksize = fs32_to_cpu(sb, usb1->fs_fsize);
745 sb->s_blocksize_bits = fs32_to_cpu(sb, usb1->fs_fshift);
746 sb->s_op = &ufs_super_ops;
747 sb->dq_op = NULL; /***/
748 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
749
750 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
751 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
752 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
753 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
754 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
755 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
756 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
757 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
758 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
759 /* s_bsize already set */
760 /* s_fsize already set */
761 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
762 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
763 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
764 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
765 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
766 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
767 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
768 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
769 /* s_sbsize already set */
770 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
771 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
772 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
773 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
774 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
775 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
776 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
777 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
778 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
779 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
780 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
781 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
782 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
783 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
784 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
785 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
786 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
787 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
788 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
789 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
790 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
791 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
792 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
793 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
794
795 /*
796 * Compute another frequently used values
797 */
798 uspi->s_fpbmask = uspi->s_fpb - 1;
799 uspi->s_apbshift = uspi->s_bshift - 2;
800 uspi->s_2apbshift = uspi->s_apbshift * 2;
801 uspi->s_3apbshift = uspi->s_apbshift * 3;
802 uspi->s_apb = 1 << uspi->s_apbshift;
803 uspi->s_2apb = 1 << uspi->s_2apbshift;
804 uspi->s_3apb = 1 << uspi->s_3apbshift;
805 uspi->s_apbmask = uspi->s_apb - 1;
806 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
807 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
808 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
809 uspi->s_bpf = uspi->s_fsize << 3;
810 uspi->s_bpfshift = uspi->s_fshift + 3;
811 uspi->s_bpfmask = uspi->s_bpf - 1;
812 if ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) ==
813 UFS_MOUNT_UFSTYPE_44BSD)
814 uspi->s_maxsymlinklen =
815 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
816
817 sb->u.ufs_sb.s_flags = flags;
818
819 inode = iget(sb, UFS_ROOTINO);
820 if (!inode || is_bad_inode(inode))
821 goto failed;
822 sb->s_root = d_alloc_root(inode);
823 if (!sb->s_root)
824 goto dalloc_failed;
825
826
827 /*
828 * Read cylinder group structures
829 */
830 if (!(sb->s_flags & MS_RDONLY))
831 if (!ufs_read_cylinder_structures(sb))
832 goto failed;
833
834 UFSD(("EXIT\n"))
835 return(sb);
836
837 dalloc_failed:
838 iput(inode);
839 failed:
840 if (ubh) ubh_brelse_uspi (uspi);
841 if (uspi) kfree (uspi);
842 UFSD(("EXIT (FAILED)\n"))
843 return(NULL);
844 }
845
ufs_write_super(struct super_block * sb)846 void ufs_write_super (struct super_block * sb) {
847 struct ufs_sb_private_info * uspi;
848 struct ufs_super_block_first * usb1;
849 struct ufs_super_block_third * usb3;
850 unsigned flags;
851
852 UFSD(("ENTER\n"))
853 flags = sb->u.ufs_sb.s_flags;
854 uspi = sb->u.ufs_sb.s_uspi;
855 usb1 = ubh_get_usb_first(USPI_UBH);
856 usb3 = ubh_get_usb_third(USPI_UBH);
857
858 if (!(sb->s_flags & MS_RDONLY)) {
859 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME);
860 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
861 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
862 ufs_set_fs_state(sb, usb1, usb3,
863 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
864 ubh_mark_buffer_dirty (USPI_UBH);
865 }
866 sb->s_dirt = 0;
867 UFSD(("EXIT\n"))
868 }
869
ufs_put_super(struct super_block * sb)870 void ufs_put_super (struct super_block * sb)
871 {
872 struct ufs_sb_private_info * uspi;
873
874 UFSD(("ENTER\n"))
875
876 uspi = sb->u.ufs_sb.s_uspi;
877
878 if (!(sb->s_flags & MS_RDONLY))
879 ufs_put_cylinder_structures (sb);
880
881 ubh_brelse_uspi (uspi);
882 kfree (sb->u.ufs_sb.s_uspi);
883 return;
884 }
885
886
ufs_remount(struct super_block * sb,int * mount_flags,char * data)887 int ufs_remount (struct super_block * sb, int * mount_flags, char * data)
888 {
889 struct ufs_sb_private_info * uspi;
890 struct ufs_super_block_first * usb1;
891 struct ufs_super_block_third * usb3;
892 unsigned new_mount_opt, ufstype;
893 unsigned flags;
894
895 uspi = sb->u.ufs_sb.s_uspi;
896 flags = sb->u.ufs_sb.s_flags;
897 usb1 = ubh_get_usb_first(USPI_UBH);
898 usb3 = ubh_get_usb_third(USPI_UBH);
899
900 /*
901 * Allow the "check" option to be passed as a remount option.
902 * It is not possible to change ufstype option during remount
903 */
904 ufstype = sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE;
905 new_mount_opt = 0;
906 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
907 if (!ufs_parse_options (data, &new_mount_opt))
908 return -EINVAL;
909 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
910 new_mount_opt |= ufstype;
911 }
912 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
913 printk("ufstype can't be changed during remount\n");
914 return -EINVAL;
915 }
916
917 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
918 sb->u.ufs_sb.s_mount_opt = new_mount_opt;
919 return 0;
920 }
921
922 /*
923 * fs was mouted as rw, remounting ro
924 */
925 if (*mount_flags & MS_RDONLY) {
926 ufs_put_cylinder_structures(sb);
927 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME);
928 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
929 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
930 ufs_set_fs_state(sb, usb1, usb3,
931 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
932 ubh_mark_buffer_dirty (USPI_UBH);
933 sb->s_dirt = 0;
934 sb->s_flags |= MS_RDONLY;
935 }
936 /*
937 * fs was mounted as ro, remounting rw
938 */
939 else {
940 #ifndef CONFIG_UFS_FS_WRITE
941 printk("ufs was compiled with read-only support, "
942 "can't be mounted as read-write\n");
943 return -EINVAL;
944 #else
945 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
946 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
947 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
948 printk("this ufstype is read-only supported\n");
949 return -EINVAL;
950 }
951 if (!ufs_read_cylinder_structures (sb)) {
952 printk("failed during remounting\n");
953 return -EPERM;
954 }
955 sb->s_flags &= ~MS_RDONLY;
956 #endif
957 }
958 sb->u.ufs_sb.s_mount_opt = new_mount_opt;
959 return 0;
960 }
961
ufs_statfs(struct super_block * sb,struct statfs * buf)962 int ufs_statfs (struct super_block * sb, struct statfs * buf)
963 {
964 struct ufs_sb_private_info * uspi;
965 struct ufs_super_block_first * usb1;
966
967 uspi = sb->u.ufs_sb.s_uspi;
968 usb1 = ubh_get_usb_first (USPI_UBH);
969
970 buf->f_type = UFS_MAGIC;
971 buf->f_bsize = sb->s_blocksize;
972 buf->f_blocks = uspi->s_dsize;
973 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
974 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
975 buf->f_bavail = (buf->f_bfree > ((buf->f_blocks / 100) * uspi->s_minfree))
976 ? (buf->f_bfree - ((buf->f_blocks / 100) * uspi->s_minfree)) : 0;
977 buf->f_files = uspi->s_ncg * uspi->s_ipg;
978 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
979 buf->f_namelen = UFS_MAXNAMLEN;
980 return 0;
981 }
982
983 static struct super_operations ufs_super_ops = {
984 read_inode: ufs_read_inode,
985 write_inode: ufs_write_inode,
986 delete_inode: ufs_delete_inode,
987 put_super: ufs_put_super,
988 write_super: ufs_write_super,
989 statfs: ufs_statfs,
990 remount_fs: ufs_remount,
991 };
992
993 static DECLARE_FSTYPE_DEV(ufs_fs_type, "ufs", ufs_read_super);
994
init_ufs_fs(void)995 static int __init init_ufs_fs(void)
996 {
997 return register_filesystem(&ufs_fs_type);
998 }
999
exit_ufs_fs(void)1000 static void __exit exit_ufs_fs(void)
1001 {
1002 unregister_filesystem(&ufs_fs_type);
1003 }
1004
1005 EXPORT_NO_SYMBOLS;
1006
1007 module_init(init_ufs_fs)
1008 module_exit(exit_ufs_fs)
1009 MODULE_LICENSE("GPL");
1010