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[PATCH] ufs: easy debug
[linux-2.6/sactl.git] / fs / ufs / super.c
blob42425999d2d3d7aa10b2849dd365f42299105b7e
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 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 */
65
66
67 #include <linux/config.h>
68 #include <linux/module.h>
69 #include <linux/bitops.h>
70
71 #include <stdarg.h>
72
73 #include <asm/uaccess.h>
74 #include <asm/system.h>
75
76 #include <linux/errno.h>
77 #include <linux/fs.h>
78 #include <linux/ufs_fs.h>
79 #include <linux/slab.h>
80 #include <linux/time.h>
81 #include <linux/stat.h>
82 #include <linux/string.h>
83 #include <linux/blkdev.h>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/smp_lock.h>
87 #include <linux/buffer_head.h>
88 #include <linux/vfs.h>
89
90 #include "swab.h"
91 #include "util.h"
92
93 #ifdef CONFIG_UFS_DEBUG
94 /*
95 * Print contents of ufs_super_block, useful for debugging
96 */
97 void ufs_print_super_stuff(struct super_block *sb,
98 struct ufs_super_block_first * usb1,
99 struct ufs_super_block_second * usb2,
100 struct ufs_super_block_third * usb3)
101 {
102 printk("ufs_print_super_stuff\n");
103 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
104 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
105 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
106 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
107 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
108 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
109 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
110 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
111 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
112 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
113 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
114 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
115 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
116 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
117 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
118 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
119 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
120 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
121 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
122 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
123 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
124 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
125 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
126 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
127 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
128 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
129 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
130 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
131 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
132 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
133 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
134 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
135 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
136 printk("\n");
137 }
138
139 /*
140 * Print contents of ufs2 ufs_super_block, useful for debugging
141 */
142 void ufs2_print_super_stuff(
143 struct super_block *sb,
144 struct ufs_super_block *usb)
145 {
146 printk("ufs_print_super_stuff\n");
147 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
148 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
149 printk(" fs_size: %llu\n",
150 (unsigned long long)fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
151 printk(" fs_dsize: %llu\n",
152 (unsigned long long)fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
153 printk(" bsize: %u\n", fs32_to_cpu(sb, usb->fs_bsize));
154 printk(" fsize: %u\n", fs32_to_cpu(sb, usb->fs_fsize));
155 printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname);
156 printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
157 printk(" fs_sblockloc: %llu\n",
158 (unsigned long long)fs64_to_cpu(sb,
159 usb->fs_u11.fs_u2.fs_sblockloc));
160 printk(" cs_ndir(No of dirs): %llu\n",
161 (unsigned long long)fs64_to_cpu(sb,
162 usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
163 printk(" cs_nbfree(No of free blocks): %llu\n",
164 (unsigned long long)fs64_to_cpu(sb,
165 usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
166 printk("\n");
167 }
168
169 /*
170 * Print contents of ufs_cylinder_group, useful for debugging
171 */
172 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
173 {
174 printk("\nufs_print_cylinder_stuff\n");
175 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
176 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
177 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
178 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
179 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
180 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
181 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
182 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
183 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
184 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
185 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
186 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
187 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
188 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
189 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
190 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
191 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
192 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
193 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
194 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
195 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
196 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
197 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
198 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
199 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
200 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
201 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
202 printk("\n");
203 }
204 #endif /* CONFIG_UFS_DEBUG */
205
206 static struct super_operations ufs_super_ops;
207
208 static char error_buf[1024];
209
210 void ufs_error (struct super_block * sb, const char * function,
211 const char * fmt, ...)
212 {
213 struct ufs_sb_private_info * uspi;
214 struct ufs_super_block_first * usb1;
215 va_list args;
216
217 uspi = UFS_SB(sb)->s_uspi;
218 usb1 = ubh_get_usb_first(uspi);
219
220 if (!(sb->s_flags & MS_RDONLY)) {
221 usb1->fs_clean = UFS_FSBAD;
222 ubh_mark_buffer_dirty(USPI_UBH(uspi));
223 sb->s_dirt = 1;
224 sb->s_flags |= MS_RDONLY;
225 }
226 va_start (args, fmt);
227 vsprintf (error_buf, fmt, args);
228 va_end (args);
229 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
230 case UFS_MOUNT_ONERROR_PANIC:
231 panic ("UFS-fs panic (device %s): %s: %s\n",
232 sb->s_id, function, error_buf);
233
234 case UFS_MOUNT_ONERROR_LOCK:
235 case UFS_MOUNT_ONERROR_UMOUNT:
236 case UFS_MOUNT_ONERROR_REPAIR:
237 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
238 sb->s_id, function, error_buf);
239 }
240 }
241
242 void ufs_panic (struct super_block * sb, const char * function,
243 const char * fmt, ...)
244 {
245 struct ufs_sb_private_info * uspi;
246 struct ufs_super_block_first * usb1;
247 va_list args;
248
249 uspi = UFS_SB(sb)->s_uspi;
250 usb1 = ubh_get_usb_first(uspi);
251
252 if (!(sb->s_flags & MS_RDONLY)) {
253 usb1->fs_clean = UFS_FSBAD;
254 ubh_mark_buffer_dirty(USPI_UBH(uspi));
255 sb->s_dirt = 1;
256 }
257 va_start (args, fmt);
258 vsprintf (error_buf, fmt, args);
259 va_end (args);
260 sb->s_flags |= MS_RDONLY;
261 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
262 sb->s_id, function, error_buf);
263 }
264
265 void ufs_warning (struct super_block * sb, const char * function,
266 const char * fmt, ...)
267 {
268 va_list args;
269
270 va_start (args, fmt);
271 vsprintf (error_buf, fmt, args);
272 va_end (args);
273 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
274 sb->s_id, function, error_buf);
275 }
276
277 enum {
278 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
279 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
280 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
281 Opt_onerror_umount, Opt_onerror_repair, Opt_err
282 };
283
284 static match_table_t tokens = {
285 {Opt_type_old, "ufstype=old"},
286 {Opt_type_sunx86, "ufstype=sunx86"},
287 {Opt_type_sun, "ufstype=sun"},
288 {Opt_type_44bsd, "ufstype=44bsd"},
289 {Opt_type_ufs2, "ufstype=ufs2"},
290 {Opt_type_ufs2, "ufstype=5xbsd"},
291 {Opt_type_hp, "ufstype=hp"},
292 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
293 {Opt_type_nextstep, "ufstype=nextstep"},
294 {Opt_type_openstep, "ufstype=openstep"},
295 {Opt_onerror_panic, "onerror=panic"},
296 {Opt_onerror_lock, "onerror=lock"},
297 {Opt_onerror_umount, "onerror=umount"},
298 {Opt_onerror_repair, "onerror=repair"},
299 {Opt_err, NULL}
300 };
301
302 static int ufs_parse_options (char * options, unsigned * mount_options)
303 {
304 char * p;
305
306 UFSD("ENTER\n");
307
308 if (!options)
309 return 1;
310
311 while ((p = strsep(&options, ",")) != NULL) {
312 substring_t args[MAX_OPT_ARGS];
313 int token;
314 if (!*p)
315 continue;
316
317 token = match_token(p, tokens, args);
318 switch (token) {
319 case Opt_type_old:
320 ufs_clear_opt (*mount_options, UFSTYPE);
321 ufs_set_opt (*mount_options, UFSTYPE_OLD);
322 break;
323 case Opt_type_sunx86:
324 ufs_clear_opt (*mount_options, UFSTYPE);
325 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
326 break;
327 case Opt_type_sun:
328 ufs_clear_opt (*mount_options, UFSTYPE);
329 ufs_set_opt (*mount_options, UFSTYPE_SUN);
330 break;
331 case Opt_type_44bsd:
332 ufs_clear_opt (*mount_options, UFSTYPE);
333 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
334 break;
335 case Opt_type_ufs2:
336 ufs_clear_opt(*mount_options, UFSTYPE);
337 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
338 break;
339 case Opt_type_hp:
340 ufs_clear_opt (*mount_options, UFSTYPE);
341 ufs_set_opt (*mount_options, UFSTYPE_HP);
342 break;
343 case Opt_type_nextstepcd:
344 ufs_clear_opt (*mount_options, UFSTYPE);
345 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
346 break;
347 case Opt_type_nextstep:
348 ufs_clear_opt (*mount_options, UFSTYPE);
349 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
350 break;
351 case Opt_type_openstep:
352 ufs_clear_opt (*mount_options, UFSTYPE);
353 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
354 break;
355 case Opt_onerror_panic:
356 ufs_clear_opt (*mount_options, ONERROR);
357 ufs_set_opt (*mount_options, ONERROR_PANIC);
358 break;
359 case Opt_onerror_lock:
360 ufs_clear_opt (*mount_options, ONERROR);
361 ufs_set_opt (*mount_options, ONERROR_LOCK);
362 break;
363 case Opt_onerror_umount:
364 ufs_clear_opt (*mount_options, ONERROR);
365 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
366 break;
367 case Opt_onerror_repair:
368 printk("UFS-fs: Unable to do repair on error, "
369 "will lock lock instead\n");
370 ufs_clear_opt (*mount_options, ONERROR);
371 ufs_set_opt (*mount_options, ONERROR_REPAIR);
372 break;
373 default:
374 printk("UFS-fs: Invalid option: \"%s\" "
375 "or missing value\n", p);
376 return 0;
377 }
378 }
379 return 1;
380 }
381
382 /*
383 * Read on-disk structures associated with cylinder groups
384 */
385 static int ufs_read_cylinder_structures (struct super_block *sb)
386 {
387 struct ufs_sb_info * sbi = UFS_SB(sb);
388 struct ufs_sb_private_info * uspi;
389 struct ufs_super_block *usb;
390 struct ufs_buffer_head * ubh;
391 unsigned char * base, * space;
392 unsigned size, blks, i;
393 unsigned flags = 0;
394
395 UFSD("ENTER\n");
396
397 uspi = sbi->s_uspi;
398
399 usb = (struct ufs_super_block *)
400 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
401
402 flags = UFS_SB(sb)->s_flags;
403
404 /*
405 * Read cs structures from (usually) first data block
406 * on the device.
407 */
408 size = uspi->s_cssize;
409 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
410 base = space = kmalloc(size, GFP_KERNEL);
411 if (!base)
412 goto failed;
413 sbi->s_csp = (struct ufs_csum *)space;
414 for (i = 0; i < blks; i += uspi->s_fpb) {
415 size = uspi->s_bsize;
416 if (i + uspi->s_fpb > blks)
417 size = (blks - i) * uspi->s_fsize;
418
419 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
420 ubh = ubh_bread(sb,
421 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
422 else
423 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
424
425 if (!ubh)
426 goto failed;
427
428 ubh_ubhcpymem (space, ubh, size);
429
430 space += size;
431 ubh_brelse (ubh);
432 ubh = NULL;
433 }
434
435 /*
436 * Read cylinder group (we read only first fragment from block
437 * at this time) and prepare internal data structures for cg caching.
438 */
439 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
440 goto failed;
441 for (i = 0; i < uspi->s_ncg; i++)
442 sbi->s_ucg[i] = NULL;
443 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
444 sbi->s_ucpi[i] = NULL;
445 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
446 }
447 for (i = 0; i < uspi->s_ncg; i++) {
448 UFSD("read cg %u\n", i);
449 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
450 goto failed;
451 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
452 goto failed;
453 #ifdef CONFIG_UFS_DEBUG
454 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
455 #endif
456 }
457 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
458 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
459 goto failed;
460 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
461 }
462 sbi->s_cg_loaded = 0;
463 UFSD("EXIT\n");
464 return 1;
465
466 failed:
467 kfree (base);
468 if (sbi->s_ucg) {
469 for (i = 0; i < uspi->s_ncg; i++)
470 if (sbi->s_ucg[i])
471 brelse (sbi->s_ucg[i]);
472 kfree (sbi->s_ucg);
473 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
474 kfree (sbi->s_ucpi[i]);
475 }
476 UFSD("EXIT (FAILED)\n");
477 return 0;
478 }
479
480 /*
481 * Put on-disk structures associated with cylinder groups and
482 * write them back to disk
483 */
484 static void ufs_put_cylinder_structures (struct super_block *sb)
485 {
486 struct ufs_sb_info * sbi = UFS_SB(sb);
487 struct ufs_sb_private_info * uspi;
488 struct ufs_buffer_head * ubh;
489 unsigned char * base, * space;
490 unsigned blks, size, i;
491
492 UFSD("ENTER\n");
493
494 uspi = sbi->s_uspi;
495
496 size = uspi->s_cssize;
497 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
498 base = space = (char*) sbi->s_csp;
499 for (i = 0; i < blks; i += uspi->s_fpb) {
500 size = uspi->s_bsize;
501 if (i + uspi->s_fpb > blks)
502 size = (blks - i) * uspi->s_fsize;
503 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
504 ubh_memcpyubh (ubh, space, size);
505 space += size;
506 ubh_mark_buffer_uptodate (ubh, 1);
507 ubh_mark_buffer_dirty (ubh);
508 ubh_brelse (ubh);
509 }
510 for (i = 0; i < sbi->s_cg_loaded; i++) {
511 ufs_put_cylinder (sb, i);
512 kfree (sbi->s_ucpi[i]);
513 }
514 for (; i < UFS_MAX_GROUP_LOADED; i++)
515 kfree (sbi->s_ucpi[i]);
516 for (i = 0; i < uspi->s_ncg; i++)
517 brelse (sbi->s_ucg[i]);
518 kfree (sbi->s_ucg);
519 kfree (base);
520 UFSD("EXIT\n");
521 }
522
523 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
524 {
525 struct ufs_sb_info * sbi;
526 struct ufs_sb_private_info * uspi;
527 struct ufs_super_block_first * usb1;
528 struct ufs_super_block_second * usb2;
529 struct ufs_super_block_third * usb3;
530 struct ufs_super_block *usb;
531 struct ufs_buffer_head * ubh;
532 struct inode *inode;
533 unsigned block_size, super_block_size;
534 unsigned flags;
535 unsigned super_block_offset;
536
537 uspi = NULL;
538 ubh = NULL;
539 flags = 0;
540
541 UFSD("ENTER\n");
542
543 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
544 if (!sbi)
545 goto failed_nomem;
546 sb->s_fs_info = sbi;
547 memset(sbi, 0, sizeof(struct ufs_sb_info));
548
549 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
550
551 #ifndef CONFIG_UFS_FS_WRITE
552 if (!(sb->s_flags & MS_RDONLY)) {
553 printk("ufs was compiled with read-only support, "
554 "can't be mounted as read-write\n");
555 goto failed;
556 }
557 #endif
558 /*
559 * Set default mount options
560 * Parse mount options
561 */
562 sbi->s_mount_opt = 0;
563 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
564 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
565 printk("wrong mount options\n");
566 goto failed;
567 }
568 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
569 if (!silent)
570 printk("You didn't specify the type of your ufs filesystem\n\n"
571 "mount -t ufs -o ufstype="
572 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
573 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
574 "default is ufstype=old\n");
575 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
576 }
577
578 sbi->s_uspi = uspi =
579 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
580 if (!uspi)
581 goto failed;
582
583 super_block_offset=UFS_SBLOCK;
584
585 /* Keep 2Gig file limit. Some UFS variants need to override
586 this but as I don't know which I'll let those in the know loosen
587 the rules */
588 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
589 case UFS_MOUNT_UFSTYPE_44BSD:
590 UFSD("ufstype=44bsd\n");
591 uspi->s_fsize = block_size = 512;
592 uspi->s_fmask = ~(512 - 1);
593 uspi->s_fshift = 9;
594 uspi->s_sbsize = super_block_size = 1536;
595 uspi->s_sbbase = 0;
596 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
597 break;
598 case UFS_MOUNT_UFSTYPE_UFS2:
599 UFSD("ufstype=ufs2\n");
600 super_block_offset=SBLOCK_UFS2;
601 uspi->s_fsize = block_size = 512;
602 uspi->s_fmask = ~(512 - 1);
603 uspi->s_fshift = 9;
604 uspi->s_sbsize = super_block_size = 1536;
605 uspi->s_sbbase = 0;
606 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
607 if (!(sb->s_flags & MS_RDONLY)) {
608 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
609 sb->s_flags |= MS_RDONLY;
610 }
611 break;
612
613 case UFS_MOUNT_UFSTYPE_SUN:
614 UFSD("ufstype=sun\n");
615 uspi->s_fsize = block_size = 1024;
616 uspi->s_fmask = ~(1024 - 1);
617 uspi->s_fshift = 10;
618 uspi->s_sbsize = super_block_size = 2048;
619 uspi->s_sbbase = 0;
620 uspi->s_maxsymlinklen = 56;
621 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
622 break;
623
624 case UFS_MOUNT_UFSTYPE_SUNx86:
625 UFSD("ufstype=sunx86\n");
626 uspi->s_fsize = block_size = 1024;
627 uspi->s_fmask = ~(1024 - 1);
628 uspi->s_fshift = 10;
629 uspi->s_sbsize = super_block_size = 2048;
630 uspi->s_sbbase = 0;
631 uspi->s_maxsymlinklen = 56;
632 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
633 break;
634
635 case UFS_MOUNT_UFSTYPE_OLD:
636 UFSD("ufstype=old\n");
637 uspi->s_fsize = block_size = 1024;
638 uspi->s_fmask = ~(1024 - 1);
639 uspi->s_fshift = 10;
640 uspi->s_sbsize = super_block_size = 2048;
641 uspi->s_sbbase = 0;
642 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
643 if (!(sb->s_flags & MS_RDONLY)) {
644 if (!silent)
645 printk(KERN_INFO "ufstype=old is supported read-only\n");
646 sb->s_flags |= MS_RDONLY;
647 }
648 break;
649
650 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
651 UFSD("ufstype=nextstep\n");
652 uspi->s_fsize = block_size = 1024;
653 uspi->s_fmask = ~(1024 - 1);
654 uspi->s_fshift = 10;
655 uspi->s_sbsize = super_block_size = 2048;
656 uspi->s_sbbase = 0;
657 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
658 if (!(sb->s_flags & MS_RDONLY)) {
659 if (!silent)
660 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
661 sb->s_flags |= MS_RDONLY;
662 }
663 break;
664
665 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
666 UFSD("ufstype=nextstep-cd\n");
667 uspi->s_fsize = block_size = 2048;
668 uspi->s_fmask = ~(2048 - 1);
669 uspi->s_fshift = 11;
670 uspi->s_sbsize = super_block_size = 2048;
671 uspi->s_sbbase = 0;
672 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
673 if (!(sb->s_flags & MS_RDONLY)) {
674 if (!silent)
675 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
676 sb->s_flags |= MS_RDONLY;
677 }
678 break;
679
680 case UFS_MOUNT_UFSTYPE_OPENSTEP:
681 UFSD("ufstype=openstep\n");
682 uspi->s_fsize = block_size = 1024;
683 uspi->s_fmask = ~(1024 - 1);
684 uspi->s_fshift = 10;
685 uspi->s_sbsize = super_block_size = 2048;
686 uspi->s_sbbase = 0;
687 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
688 if (!(sb->s_flags & MS_RDONLY)) {
689 if (!silent)
690 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
691 sb->s_flags |= MS_RDONLY;
692 }
693 break;
694
695 case UFS_MOUNT_UFSTYPE_HP:
696 UFSD("ufstype=hp\n");
697 uspi->s_fsize = block_size = 1024;
698 uspi->s_fmask = ~(1024 - 1);
699 uspi->s_fshift = 10;
700 uspi->s_sbsize = super_block_size = 2048;
701 uspi->s_sbbase = 0;
702 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
703 if (!(sb->s_flags & MS_RDONLY)) {
704 if (!silent)
705 printk(KERN_INFO "ufstype=hp is supported read-only\n");
706 sb->s_flags |= MS_RDONLY;
707 }
708 break;
709 default:
710 if (!silent)
711 printk("unknown ufstype\n");
712 goto failed;
713 }
714
715 again:
716 if (!sb_set_blocksize(sb, block_size)) {
717 printk(KERN_ERR "UFS: failed to set blocksize\n");
718 goto failed;
719 }
720
721 /*
722 * read ufs super block from device
723 */
724
725 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
726
727 if (!ubh)
728 goto failed;
729
730
731 usb1 = ubh_get_usb_first(uspi);
732 usb2 = ubh_get_usb_second(uspi);
733 usb3 = ubh_get_usb_third(uspi);
734 usb = (struct ufs_super_block *)
735 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
736
737 /*
738 * Check ufs magic number
739 */
740 sbi->s_bytesex = BYTESEX_LE;
741 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
742 case UFS_MAGIC:
743 case UFS2_MAGIC:
744 case UFS_MAGIC_LFN:
745 case UFS_MAGIC_FEA:
746 case UFS_MAGIC_4GB:
747 goto magic_found;
748 }
749 sbi->s_bytesex = BYTESEX_BE;
750 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
751 case UFS_MAGIC:
752 case UFS2_MAGIC:
753 case UFS_MAGIC_LFN:
754 case UFS_MAGIC_FEA:
755 case UFS_MAGIC_4GB:
756 goto magic_found;
757 }
758
759 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
760 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
761 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
762 && uspi->s_sbbase < 256) {
763 ubh_brelse_uspi(uspi);
764 ubh = NULL;
765 uspi->s_sbbase += 8;
766 goto again;
767 }
768 if (!silent)
769 printk("ufs_read_super: bad magic number\n");
770 goto failed;
771
772 magic_found:
773 /*
774 * Check block and fragment sizes
775 */
776 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
777 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
778 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
779 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
780 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
781
782 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
783 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
784 uspi->s_fsize);
785 goto failed;
786 }
787 if (uspi->s_fsize < 512) {
788 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
789 uspi->s_fsize);
790 goto failed;
791 }
792 if (uspi->s_fsize > 4096) {
793 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
794 uspi->s_fsize);
795 goto failed;
796 }
797 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
798 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
799 uspi->s_bsize);
800 goto failed;
801 }
802 if (uspi->s_bsize < 4096) {
803 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
804 uspi->s_bsize);
805 goto failed;
806 }
807 if (uspi->s_bsize / uspi->s_fsize > 8) {
808 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
809 uspi->s_bsize / uspi->s_fsize);
810 goto failed;
811 }
812 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
813 ubh_brelse_uspi(uspi);
814 ubh = NULL;
815 block_size = uspi->s_fsize;
816 super_block_size = uspi->s_sbsize;
817 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
818 goto again;
819 }
820
821 #ifdef CONFIG_UFS_DEBUG
822 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
823 ufs2_print_super_stuff(sb,usb);
824 else
825 ufs_print_super_stuff(sb, usb1, usb2, usb3);
826 #endif
827
828 /*
829 * Check, if file system was correctly unmounted.
830 * If not, make it read only.
831 */
832 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
833 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
834 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
835 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
836 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
837 switch(usb1->fs_clean) {
838 case UFS_FSCLEAN:
839 UFSD("fs is clean\n");
840 break;
841 case UFS_FSSTABLE:
842 UFSD("fs is stable\n");
843 break;
844 case UFS_FSOSF1:
845 UFSD("fs is DEC OSF/1\n");
846 break;
847 case UFS_FSACTIVE:
848 printk("ufs_read_super: fs is active\n");
849 sb->s_flags |= MS_RDONLY;
850 break;
851 case UFS_FSBAD:
852 printk("ufs_read_super: fs is bad\n");
853 sb->s_flags |= MS_RDONLY;
854 break;
855 default:
856 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
857 sb->s_flags |= MS_RDONLY;
858 break;
859 }
860 }
861 else {
862 printk("ufs_read_super: fs needs fsck\n");
863 sb->s_flags |= MS_RDONLY;
864 }
865
866 /*
867 * Read ufs_super_block into internal data structures
868 */
869 sb->s_op = &ufs_super_ops;
870 sb->dq_op = NULL; /***/
871 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
872
873 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
874 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
875 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
876 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
877 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
878 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
879
880 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
881 uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
882 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
883 }
884 else {
885 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
886 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
887 }
888
889 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
890 /* s_bsize already set */
891 /* s_fsize already set */
892 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
893 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
894 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
895 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
896 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
897 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
898 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
899 uspi->s_fshift);
900 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
901 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
902 /* s_sbsize already set */
903 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
904 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
905 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
906 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
907 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
908 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
909 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
910 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
911 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
912 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
913 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
914 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
915 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
916 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
917 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
918 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
919 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
920 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
921 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
922 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
923 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
924 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
925 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
926 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
927
928 /*
929 * Compute another frequently used values
930 */
931 uspi->s_fpbmask = uspi->s_fpb - 1;
932 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
933 uspi->s_apbshift = uspi->s_bshift - 3;
934 else
935 uspi->s_apbshift = uspi->s_bshift - 2;
936
937 uspi->s_2apbshift = uspi->s_apbshift * 2;
938 uspi->s_3apbshift = uspi->s_apbshift * 3;
939 uspi->s_apb = 1 << uspi->s_apbshift;
940 uspi->s_2apb = 1 << uspi->s_2apbshift;
941 uspi->s_3apb = 1 << uspi->s_3apbshift;
942 uspi->s_apbmask = uspi->s_apb - 1;
943 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
944 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
945 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
946 uspi->s_bpf = uspi->s_fsize << 3;
947 uspi->s_bpfshift = uspi->s_fshift + 3;
948 uspi->s_bpfmask = uspi->s_bpf - 1;
949 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
950 UFS_MOUNT_UFSTYPE_44BSD)
951 uspi->s_maxsymlinklen =
952 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
953
954 sbi->s_flags = flags;
955
956 inode = iget(sb, UFS_ROOTINO);
957 if (!inode || is_bad_inode(inode))
958 goto failed;
959 sb->s_root = d_alloc_root(inode);
960 if (!sb->s_root)
961 goto dalloc_failed;
962
963
964 /*
965 * Read cylinder group structures
966 */
967 if (!(sb->s_flags & MS_RDONLY))
968 if (!ufs_read_cylinder_structures(sb))
969 goto failed;
970
971 UFSD("EXIT\n");
972 return 0;
973
974 dalloc_failed:
975 iput(inode);
976 failed:
977 if (ubh)
978 ubh_brelse_uspi (uspi);
979 kfree (uspi);
980 kfree(sbi);
981 sb->s_fs_info = NULL;
982 UFSD("EXIT (FAILED)\n");
983 return -EINVAL;
984
985 failed_nomem:
986 UFSD("EXIT (NOMEM)\n");
987 return -ENOMEM;
988 }
989
990 static void ufs_write_super (struct super_block *sb) {
991 struct ufs_sb_private_info * uspi;
992 struct ufs_super_block_first * usb1;
993 struct ufs_super_block_third * usb3;
994 unsigned flags;
995
996 lock_kernel();
997
998 UFSD("ENTER\n");
999 flags = UFS_SB(sb)->s_flags;
1000 uspi = UFS_SB(sb)->s_uspi;
1001 usb1 = ubh_get_usb_first(uspi);
1002 usb3 = ubh_get_usb_third(uspi);
1003
1004 if (!(sb->s_flags & MS_RDONLY)) {
1005 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1006 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1007 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1008 ufs_set_fs_state(sb, usb1, usb3,
1009 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1010 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1011 }
1012 sb->s_dirt = 0;
1013 UFSD("EXIT\n");
1014 unlock_kernel();
1015 }
1016
1017 static void ufs_put_super(struct super_block *sb)
1018 {
1019 struct ufs_sb_info * sbi = UFS_SB(sb);
1020
1021 UFSD("ENTER\n");
1022
1023 if (!(sb->s_flags & MS_RDONLY))
1024 ufs_put_cylinder_structures (sb);
1025
1026 ubh_brelse_uspi (sbi->s_uspi);
1027 kfree (sbi->s_uspi);
1028 kfree (sbi);
1029 sb->s_fs_info = NULL;
1030 UFSD("EXIT\n");
1031 return;
1032 }
1033
1034
1035 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1036 {
1037 struct ufs_sb_private_info * uspi;
1038 struct ufs_super_block_first * usb1;
1039 struct ufs_super_block_third * usb3;
1040 unsigned new_mount_opt, ufstype;
1041 unsigned flags;
1042
1043 uspi = UFS_SB(sb)->s_uspi;
1044 flags = UFS_SB(sb)->s_flags;
1045 usb1 = ubh_get_usb_first(uspi);
1046 usb3 = ubh_get_usb_third(uspi);
1047
1048 /*
1049 * Allow the "check" option to be passed as a remount option.
1050 * It is not possible to change ufstype option during remount
1051 */
1052 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1053 new_mount_opt = 0;
1054 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1055 if (!ufs_parse_options (data, &new_mount_opt))
1056 return -EINVAL;
1057 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1058 new_mount_opt |= ufstype;
1059 }
1060 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1061 printk("ufstype can't be changed during remount\n");
1062 return -EINVAL;
1063 }
1064
1065 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1066 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1067 return 0;
1068 }
1069
1070 /*
1071 * fs was mouted as rw, remounting ro
1072 */
1073 if (*mount_flags & MS_RDONLY) {
1074 ufs_put_cylinder_structures(sb);
1075 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1076 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1077 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1078 ufs_set_fs_state(sb, usb1, usb3,
1079 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1080 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1081 sb->s_dirt = 0;
1082 sb->s_flags |= MS_RDONLY;
1083 }
1084 /*
1085 * fs was mounted as ro, remounting rw
1086 */
1087 else {
1088 #ifndef CONFIG_UFS_FS_WRITE
1089 printk("ufs was compiled with read-only support, "
1090 "can't be mounted as read-write\n");
1091 return -EINVAL;
1092 #else
1093 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1094 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1095 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1096 printk("this ufstype is read-only supported\n");
1097 return -EINVAL;
1098 }
1099 if (!ufs_read_cylinder_structures (sb)) {
1100 printk("failed during remounting\n");
1101 return -EPERM;
1102 }
1103 sb->s_flags &= ~MS_RDONLY;
1104 #endif
1105 }
1106 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1107 return 0;
1108 }
1109
1110 static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf)
1111 {
1112 struct super_block *sb = dentry->d_sb;
1113 struct ufs_sb_private_info * uspi;
1114 struct ufs_super_block_first * usb1;
1115 struct ufs_super_block * usb;
1116 unsigned flags = 0;
1117
1118 lock_kernel();
1119
1120 uspi = UFS_SB(sb)->s_uspi;
1121 usb1 = ubh_get_usb_first (uspi);
1122 usb = (struct ufs_super_block *)
1123 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1124
1125 flags = UFS_SB(sb)->s_flags;
1126 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1127 buf->f_type = UFS2_MAGIC;
1128 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1129 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1130 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1131 buf->f_ffree = fs64_to_cpu(sb,
1132 usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1133 }
1134 else {
1135 buf->f_type = UFS_MAGIC;
1136 buf->f_blocks = uspi->s_dsize;
1137 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1138 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1139 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1140 }
1141 buf->f_bsize = sb->s_blocksize;
1142 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1143 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1144 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1145 buf->f_namelen = UFS_MAXNAMLEN;
1146
1147 unlock_kernel();
1148
1149 return 0;
1150 }
1151
1152 static kmem_cache_t * ufs_inode_cachep;
1153
1154 static struct inode *ufs_alloc_inode(struct super_block *sb)
1155 {
1156 struct ufs_inode_info *ei;
1157 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1158 if (!ei)
1159 return NULL;
1160 ei->vfs_inode.i_version = 1;
1161 return &ei->vfs_inode;
1162 }
1163
1164 static void ufs_destroy_inode(struct inode *inode)
1165 {
1166 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1167 }
1168
1169 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1170 {
1171 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1172
1173 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1174 SLAB_CTOR_CONSTRUCTOR)
1175 inode_init_once(&ei->vfs_inode);
1176 }
1177
1178 static int init_inodecache(void)
1179 {
1180 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1181 sizeof(struct ufs_inode_info),
1182 0, (SLAB_RECLAIM_ACCOUNT|
1183 SLAB_MEM_SPREAD),
1184 init_once, NULL);
1185 if (ufs_inode_cachep == NULL)
1186 return -ENOMEM;
1187 return 0;
1188 }
1189
1190 static void destroy_inodecache(void)
1191 {
1192 if (kmem_cache_destroy(ufs_inode_cachep))
1193 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1194 }
1195
1196 #ifdef CONFIG_QUOTA
1197 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1198 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1199 #endif
1200
1201 static struct super_operations ufs_super_ops = {
1202 .alloc_inode = ufs_alloc_inode,
1203 .destroy_inode = ufs_destroy_inode,
1204 .read_inode = ufs_read_inode,
1205 .write_inode = ufs_write_inode,
1206 .delete_inode = ufs_delete_inode,
1207 .put_super = ufs_put_super,
1208 .write_super = ufs_write_super,
1209 .statfs = ufs_statfs,
1210 .remount_fs = ufs_remount,
1211 #ifdef CONFIG_QUOTA
1212 .quota_read = ufs_quota_read,
1213 .quota_write = ufs_quota_write,
1214 #endif
1215 };
1216
1217 #ifdef CONFIG_QUOTA
1218
1219 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1220 * acquiring the locks... As quota files are never truncated and quota code
1221 * itself serializes the operations (and noone else should touch the files)
1222 * we don't have to be afraid of races */
1223 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1224 size_t len, loff_t off)
1225 {
1226 struct inode *inode = sb_dqopt(sb)->files[type];
1227 sector_t blk = off >> sb->s_blocksize_bits;
1228 int err = 0;
1229 int offset = off & (sb->s_blocksize - 1);
1230 int tocopy;
1231 size_t toread;
1232 struct buffer_head *bh;
1233 loff_t i_size = i_size_read(inode);
1234
1235 if (off > i_size)
1236 return 0;
1237 if (off+len > i_size)
1238 len = i_size-off;
1239 toread = len;
1240 while (toread > 0) {
1241 tocopy = sb->s_blocksize - offset < toread ?
1242 sb->s_blocksize - offset : toread;
1243
1244 bh = ufs_bread(inode, blk, 0, &err);
1245 if (err)
1246 return err;
1247 if (!bh) /* A hole? */
1248 memset(data, 0, tocopy);
1249 else {
1250 memcpy(data, bh->b_data+offset, tocopy);
1251 brelse(bh);
1252 }
1253 offset = 0;
1254 toread -= tocopy;
1255 data += tocopy;
1256 blk++;
1257 }
1258 return len;
1259 }
1260
1261 /* Write to quotafile */
1262 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1263 const char *data, size_t len, loff_t off)
1264 {
1265 struct inode *inode = sb_dqopt(sb)->files[type];
1266 sector_t blk = off >> sb->s_blocksize_bits;
1267 int err = 0;
1268 int offset = off & (sb->s_blocksize - 1);
1269 int tocopy;
1270 size_t towrite = len;
1271 struct buffer_head *bh;
1272
1273 mutex_lock(&inode->i_mutex);
1274 while (towrite > 0) {
1275 tocopy = sb->s_blocksize - offset < towrite ?
1276 sb->s_blocksize - offset : towrite;
1277
1278 bh = ufs_bread(inode, blk, 1, &err);
1279 if (!bh)
1280 goto out;
1281 lock_buffer(bh);
1282 memcpy(bh->b_data+offset, data, tocopy);
1283 flush_dcache_page(bh->b_page);
1284 set_buffer_uptodate(bh);
1285 mark_buffer_dirty(bh);
1286 unlock_buffer(bh);
1287 brelse(bh);
1288 offset = 0;
1289 towrite -= tocopy;
1290 data += tocopy;
1291 blk++;
1292 }
1293 out:
1294 if (len == towrite) {
1295 mutex_unlock(&inode->i_mutex);
1296 return err;
1297 }
1298 if (inode->i_size < off+len-towrite)
1299 i_size_write(inode, off+len-towrite);
1300 inode->i_version++;
1301 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1302 mark_inode_dirty(inode);
1303 mutex_unlock(&inode->i_mutex);
1304 return len - towrite;
1305 }
1306
1307 #endif
1308
1309 static int ufs_get_sb(struct file_system_type *fs_type,
1310 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1311 {
1312 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1313 }
1314
1315 static struct file_system_type ufs_fs_type = {
1316 .owner = THIS_MODULE,
1317 .name = "ufs",
1318 .get_sb = ufs_get_sb,
1319 .kill_sb = kill_block_super,
1320 .fs_flags = FS_REQUIRES_DEV,
1321 };
1322
1323 static int __init init_ufs_fs(void)
1324 {
1325 int err = init_inodecache();
1326 if (err)
1327 goto out1;
1328 err = register_filesystem(&ufs_fs_type);
1329 if (err)
1330 goto out;
1331 return 0;
1332 out:
1333 destroy_inodecache();
1334 out1:
1335 return err;
1336 }
1337
1338 static void __exit exit_ufs_fs(void)
1339 {
1340 unregister_filesystem(&ufs_fs_type);
1341 destroy_inodecache();
1342 }
1343
1344 module_init(init_ufs_fs)
1345 module_exit(exit_ufs_fs)
1346 MODULE_LICENSE("GPL");
SocketAccessConTroL development