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Linux v2.6.15-rc7
[pohmelfs.git] / fs / ufs / super.c
blob54828ebcf1bacda4d1c94dc4461cd99d8264234d
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 #undef UFS_SUPER_DEBUG
94 #undef UFS_SUPER_DEBUG_MORE
95
96
97 #undef UFS_SUPER_DEBUG_MORE
98 #ifdef UFS_SUPER_DEBUG
99 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
100 #else
101 #define UFSD(x)
102 #endif
103
104 #ifdef UFS_SUPER_DEBUG_MORE
105 /*
106 * Print contents of ufs_super_block, useful for debugging
107 */
108 void ufs_print_super_stuff(struct super_block *sb,
109 struct ufs_super_block_first * usb1,
110 struct ufs_super_block_second * usb2,
111 struct ufs_super_block_third * usb3)
112 {
113 printk("ufs_print_super_stuff\n");
114 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
115 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
116 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
117 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
118 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
119 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
120 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
121 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
122 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
123 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
124 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
125 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
126 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
127 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
128 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
129 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
130 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
131 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
132 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
133 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
134 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
135 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
136 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
137 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
138 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
139 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
140 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
141 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
142 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
143 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
144 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
145 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
146 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
147 printk("\n");
148 }
149
150 /*
151 * Print contents of ufs2 ufs_super_block, useful for debugging
152 */
153 void ufs2_print_super_stuff(
154 struct super_block *sb,
155 struct ufs_super_block *usb)
156 {
157 printk("ufs_print_super_stuff\n");
158 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
159 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
160 printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
161 printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
162 printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize));
163 printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize));
164 printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname);
165 printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
166 printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb,
167 usb->fs_u11.fs_u2.fs_sblockloc));
168 printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb,
169 usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
170 printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb,
171 usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
172 printk("\n");
173 }
174
175 /*
176 * Print contents of ufs_cylinder_group, useful for debugging
177 */
178 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
179 {
180 printk("\nufs_print_cylinder_stuff\n");
181 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
182 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
183 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
184 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
185 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
186 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
187 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
188 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
189 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
190 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
191 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
192 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
193 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
194 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
195 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
196 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
197 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
198 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
199 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
200 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
201 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
202 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
203 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
204 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
205 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
207 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
208 printk("\n");
209 }
210 #endif /* UFS_SUPER_DEBUG_MORE */
211
212 static struct super_operations ufs_super_ops;
213
214 static char error_buf[1024];
215
216 void ufs_error (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 = UFS_SB(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 sb->s_flags |= MS_RDONLY;
231 }
232 va_start (args, fmt);
233 vsprintf (error_buf, fmt, args);
234 va_end (args);
235 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
236 case UFS_MOUNT_ONERROR_PANIC:
237 panic ("UFS-fs panic (device %s): %s: %s\n",
238 sb->s_id, function, error_buf);
239
240 case UFS_MOUNT_ONERROR_LOCK:
241 case UFS_MOUNT_ONERROR_UMOUNT:
242 case UFS_MOUNT_ONERROR_REPAIR:
243 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
244 sb->s_id, function, error_buf);
245 }
246 }
247
248 void ufs_panic (struct super_block * sb, const char * function,
249 const char * fmt, ...)
250 {
251 struct ufs_sb_private_info * uspi;
252 struct ufs_super_block_first * usb1;
253 va_list args;
254
255 uspi = UFS_SB(sb)->s_uspi;
256 usb1 = ubh_get_usb_first(USPI_UBH);
257
258 if (!(sb->s_flags & MS_RDONLY)) {
259 usb1->fs_clean = UFS_FSBAD;
260 ubh_mark_buffer_dirty(USPI_UBH);
261 sb->s_dirt = 1;
262 }
263 va_start (args, fmt);
264 vsprintf (error_buf, fmt, args);
265 va_end (args);
266 sb->s_flags |= MS_RDONLY;
267 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
268 sb->s_id, function, error_buf);
269 }
270
271 void ufs_warning (struct super_block * sb, const char * function,
272 const char * fmt, ...)
273 {
274 va_list args;
275
276 va_start (args, fmt);
277 vsprintf (error_buf, fmt, args);
278 va_end (args);
279 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
280 sb->s_id, function, error_buf);
281 }
282
283 enum {
284 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
285 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
286 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
287 Opt_onerror_umount, Opt_onerror_repair, Opt_err
288 };
289
290 static match_table_t tokens = {
291 {Opt_type_old, "ufstype=old"},
292 {Opt_type_sunx86, "ufstype=sunx86"},
293 {Opt_type_sun, "ufstype=sun"},
294 {Opt_type_44bsd, "ufstype=44bsd"},
295 {Opt_type_ufs2, "ufstype=ufs2"},
296 {Opt_type_ufs2, "ufstype=5xbsd"},
297 {Opt_type_hp, "ufstype=hp"},
298 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
299 {Opt_type_nextstep, "ufstype=nextstep"},
300 {Opt_type_openstep, "ufstype=openstep"},
301 {Opt_onerror_panic, "onerror=panic"},
302 {Opt_onerror_lock, "onerror=lock"},
303 {Opt_onerror_umount, "onerror=umount"},
304 {Opt_onerror_repair, "onerror=repair"},
305 {Opt_err, NULL}
306 };
307
308 static int ufs_parse_options (char * options, unsigned * mount_options)
309 {
310 char * p;
311
312 UFSD(("ENTER\n"))
313
314 if (!options)
315 return 1;
316
317 while ((p = strsep(&options, ",")) != NULL) {
318 substring_t args[MAX_OPT_ARGS];
319 int token;
320 if (!*p)
321 continue;
322
323 token = match_token(p, tokens, args);
324 switch (token) {
325 case Opt_type_old:
326 ufs_clear_opt (*mount_options, UFSTYPE);
327 ufs_set_opt (*mount_options, UFSTYPE_OLD);
328 break;
329 case Opt_type_sunx86:
330 ufs_clear_opt (*mount_options, UFSTYPE);
331 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
332 break;
333 case Opt_type_sun:
334 ufs_clear_opt (*mount_options, UFSTYPE);
335 ufs_set_opt (*mount_options, UFSTYPE_SUN);
336 break;
337 case Opt_type_44bsd:
338 ufs_clear_opt (*mount_options, UFSTYPE);
339 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
340 break;
341 case Opt_type_ufs2:
342 ufs_clear_opt(*mount_options, UFSTYPE);
343 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
344 break;
345 case Opt_type_hp:
346 ufs_clear_opt (*mount_options, UFSTYPE);
347 ufs_set_opt (*mount_options, UFSTYPE_HP);
348 break;
349 case Opt_type_nextstepcd:
350 ufs_clear_opt (*mount_options, UFSTYPE);
351 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
352 break;
353 case Opt_type_nextstep:
354 ufs_clear_opt (*mount_options, UFSTYPE);
355 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
356 break;
357 case Opt_type_openstep:
358 ufs_clear_opt (*mount_options, UFSTYPE);
359 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
360 break;
361 case Opt_onerror_panic:
362 ufs_clear_opt (*mount_options, ONERROR);
363 ufs_set_opt (*mount_options, ONERROR_PANIC);
364 break;
365 case Opt_onerror_lock:
366 ufs_clear_opt (*mount_options, ONERROR);
367 ufs_set_opt (*mount_options, ONERROR_LOCK);
368 break;
369 case Opt_onerror_umount:
370 ufs_clear_opt (*mount_options, ONERROR);
371 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
372 break;
373 case Opt_onerror_repair:
374 printk("UFS-fs: Unable to do repair on error, "
375 "will lock lock instead\n");
376 ufs_clear_opt (*mount_options, ONERROR);
377 ufs_set_opt (*mount_options, ONERROR_REPAIR);
378 break;
379 default:
380 printk("UFS-fs: Invalid option: \"%s\" "
381 "or missing value\n", p);
382 return 0;
383 }
384 }
385 return 1;
386 }
387
388 /*
389 * Read on-disk structures associated with cylinder groups
390 */
391 static int ufs_read_cylinder_structures (struct super_block *sb) {
392 struct ufs_sb_info * sbi = UFS_SB(sb);
393 struct ufs_sb_private_info * uspi;
394 struct ufs_super_block *usb;
395 struct ufs_buffer_head * ubh;
396 unsigned char * base, * space;
397 unsigned size, blks, i;
398 unsigned flags = 0;
399
400 UFSD(("ENTER\n"))
401
402 uspi = sbi->s_uspi;
403
404 usb = (struct ufs_super_block *)
405 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
406
407 flags = UFS_SB(sb)->s_flags;
408
409 /*
410 * Read cs structures from (usually) first data block
411 * on the device.
412 */
413 size = uspi->s_cssize;
414 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
415 base = space = kmalloc(size, GFP_KERNEL);
416 if (!base)
417 goto failed;
418 for (i = 0; i < blks; i += uspi->s_fpb) {
419 size = uspi->s_bsize;
420 if (i + uspi->s_fpb > blks)
421 size = (blks - i) * uspi->s_fsize;
422
423 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
424 ubh = ubh_bread(sb,
425 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
426 if (!ubh)
427 goto failed;
428 ubh_ubhcpymem (space, ubh, size);
429 sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
430 }
431 else {
432 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
433 if (!ubh)
434 goto failed;
435 ubh_ubhcpymem(space, ubh, size);
436 sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
437 }
438 space += size;
439 ubh_brelse (ubh);
440 ubh = NULL;
441 }
442
443 /*
444 * Read cylinder group (we read only first fragment from block
445 * at this time) and prepare internal data structures for cg caching.
446 */
447 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
448 goto failed;
449 for (i = 0; i < uspi->s_ncg; i++)
450 sbi->s_ucg[i] = NULL;
451 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
452 sbi->s_ucpi[i] = NULL;
453 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
454 }
455 for (i = 0; i < uspi->s_ncg; i++) {
456 UFSD(("read cg %u\n", i))
457 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
458 goto failed;
459 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
460 goto failed;
461 #ifdef UFS_SUPER_DEBUG_MORE
462 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
463 #endif
464 }
465 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
466 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
467 goto failed;
468 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
469 }
470 sbi->s_cg_loaded = 0;
471 UFSD(("EXIT\n"))
472 return 1;
473
474 failed:
475 kfree (base);
476 if (sbi->s_ucg) {
477 for (i = 0; i < uspi->s_ncg; i++)
478 if (sbi->s_ucg[i])
479 brelse (sbi->s_ucg[i]);
480 kfree (sbi->s_ucg);
481 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
482 kfree (sbi->s_ucpi[i]);
483 }
484 UFSD(("EXIT (FAILED)\n"))
485 return 0;
486 }
487
488 /*
489 * Put on-disk structures associated with cylinder groups and
490 * write them back to disk
491 */
492 static void ufs_put_cylinder_structures (struct super_block *sb) {
493 struct ufs_sb_info * sbi = UFS_SB(sb);
494 struct ufs_sb_private_info * uspi;
495 struct ufs_buffer_head * ubh;
496 unsigned char * base, * space;
497 unsigned blks, size, i;
498
499 UFSD(("ENTER\n"))
500
501 uspi = sbi->s_uspi;
502
503 size = uspi->s_cssize;
504 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
505 base = space = (char*) sbi->s_csp[0];
506 for (i = 0; i < blks; i += uspi->s_fpb) {
507 size = uspi->s_bsize;
508 if (i + uspi->s_fpb > blks)
509 size = (blks - i) * uspi->s_fsize;
510 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
511 ubh_memcpyubh (ubh, space, size);
512 space += size;
513 ubh_mark_buffer_uptodate (ubh, 1);
514 ubh_mark_buffer_dirty (ubh);
515 ubh_brelse (ubh);
516 }
517 for (i = 0; i < sbi->s_cg_loaded; i++) {
518 ufs_put_cylinder (sb, i);
519 kfree (sbi->s_ucpi[i]);
520 }
521 for (; i < UFS_MAX_GROUP_LOADED; i++)
522 kfree (sbi->s_ucpi[i]);
523 for (i = 0; i < uspi->s_ncg; i++)
524 brelse (sbi->s_ucg[i]);
525 kfree (sbi->s_ucg);
526 kfree (base);
527 UFSD(("EXIT\n"))
528 }
529
530 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
531 {
532 struct ufs_sb_info * sbi;
533 struct ufs_sb_private_info * uspi;
534 struct ufs_super_block_first * usb1;
535 struct ufs_super_block_second * usb2;
536 struct ufs_super_block_third * usb3;
537 struct ufs_super_block *usb;
538 struct ufs_buffer_head * ubh;
539 struct inode *inode;
540 unsigned block_size, super_block_size;
541 unsigned flags;
542
543 uspi = NULL;
544 ubh = NULL;
545 flags = 0;
546
547 UFSD(("ENTER\n"))
548
549 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
550 if (!sbi)
551 goto failed_nomem;
552 sb->s_fs_info = sbi;
553 memset(sbi, 0, sizeof(struct ufs_sb_info));
554
555 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
556
557 #ifndef CONFIG_UFS_FS_WRITE
558 if (!(sb->s_flags & MS_RDONLY)) {
559 printk("ufs was compiled with read-only support, "
560 "can't be mounted as read-write\n");
561 goto failed;
562 }
563 #endif
564 /*
565 * Set default mount options
566 * Parse mount options
567 */
568 sbi->s_mount_opt = 0;
569 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
570 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
571 printk("wrong mount options\n");
572 goto failed;
573 }
574 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
575 if (!silent)
576 printk("You didn't specify the type of your ufs filesystem\n\n"
577 "mount -t ufs -o ufstype="
578 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
579 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
580 "default is ufstype=old\n");
581 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
582 }
583
584 sbi->s_uspi = uspi =
585 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
586 if (!uspi)
587 goto failed;
588
589 /* Keep 2Gig file limit. Some UFS variants need to override
590 this but as I don't know which I'll let those in the know loosen
591 the rules */
592
593 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
594 case UFS_MOUNT_UFSTYPE_44BSD:
595 UFSD(("ufstype=44bsd\n"))
596 uspi->s_fsize = block_size = 512;
597 uspi->s_fmask = ~(512 - 1);
598 uspi->s_fshift = 9;
599 uspi->s_sbsize = super_block_size = 1536;
600 uspi->s_sbbase = 0;
601 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
602 break;
603 case UFS_MOUNT_UFSTYPE_UFS2:
604 UFSD(("ufstype=ufs2\n"))
605 uspi->s_fsize = block_size = 512;
606 uspi->s_fmask = ~(512 - 1);
607 uspi->s_fshift = 9;
608 uspi->s_sbsize = super_block_size = 1536;
609 uspi->s_sbbase = 0;
610 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
611 if (!(sb->s_flags & MS_RDONLY)) {
612 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
613 sb->s_flags |= MS_RDONLY;
614 }
615 break;
616
617 case UFS_MOUNT_UFSTYPE_SUN:
618 UFSD(("ufstype=sun\n"))
619 uspi->s_fsize = block_size = 1024;
620 uspi->s_fmask = ~(1024 - 1);
621 uspi->s_fshift = 10;
622 uspi->s_sbsize = super_block_size = 2048;
623 uspi->s_sbbase = 0;
624 uspi->s_maxsymlinklen = 56;
625 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
626 break;
627
628 case UFS_MOUNT_UFSTYPE_SUNx86:
629 UFSD(("ufstype=sunx86\n"))
630 uspi->s_fsize = block_size = 1024;
631 uspi->s_fmask = ~(1024 - 1);
632 uspi->s_fshift = 10;
633 uspi->s_sbsize = super_block_size = 2048;
634 uspi->s_sbbase = 0;
635 uspi->s_maxsymlinklen = 56;
636 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
637 break;
638
639 case UFS_MOUNT_UFSTYPE_OLD:
640 UFSD(("ufstype=old\n"))
641 uspi->s_fsize = block_size = 1024;
642 uspi->s_fmask = ~(1024 - 1);
643 uspi->s_fshift = 10;
644 uspi->s_sbsize = super_block_size = 2048;
645 uspi->s_sbbase = 0;
646 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
647 if (!(sb->s_flags & MS_RDONLY)) {
648 if (!silent)
649 printk(KERN_INFO "ufstype=old is supported read-only\n");
650 sb->s_flags |= MS_RDONLY;
651 }
652 break;
653
654 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
655 UFSD(("ufstype=nextstep\n"))
656 uspi->s_fsize = block_size = 1024;
657 uspi->s_fmask = ~(1024 - 1);
658 uspi->s_fshift = 10;
659 uspi->s_sbsize = super_block_size = 2048;
660 uspi->s_sbbase = 0;
661 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
662 if (!(sb->s_flags & MS_RDONLY)) {
663 if (!silent)
664 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
665 sb->s_flags |= MS_RDONLY;
666 }
667 break;
668
669 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
670 UFSD(("ufstype=nextstep-cd\n"))
671 uspi->s_fsize = block_size = 2048;
672 uspi->s_fmask = ~(2048 - 1);
673 uspi->s_fshift = 11;
674 uspi->s_sbsize = super_block_size = 2048;
675 uspi->s_sbbase = 0;
676 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
677 if (!(sb->s_flags & MS_RDONLY)) {
678 if (!silent)
679 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
680 sb->s_flags |= MS_RDONLY;
681 }
682 break;
683
684 case UFS_MOUNT_UFSTYPE_OPENSTEP:
685 UFSD(("ufstype=openstep\n"))
686 uspi->s_fsize = block_size = 1024;
687 uspi->s_fmask = ~(1024 - 1);
688 uspi->s_fshift = 10;
689 uspi->s_sbsize = super_block_size = 2048;
690 uspi->s_sbbase = 0;
691 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
692 if (!(sb->s_flags & MS_RDONLY)) {
693 if (!silent)
694 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
695 sb->s_flags |= MS_RDONLY;
696 }
697 break;
698
699 case UFS_MOUNT_UFSTYPE_HP:
700 UFSD(("ufstype=hp\n"))
701 uspi->s_fsize = block_size = 1024;
702 uspi->s_fmask = ~(1024 - 1);
703 uspi->s_fshift = 10;
704 uspi->s_sbsize = super_block_size = 2048;
705 uspi->s_sbbase = 0;
706 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
707 if (!(sb->s_flags & MS_RDONLY)) {
708 if (!silent)
709 printk(KERN_INFO "ufstype=hp is supported read-only\n");
710 sb->s_flags |= MS_RDONLY;
711 }
712 break;
713 default:
714 if (!silent)
715 printk("unknown ufstype\n");
716 goto failed;
717 }
718
719 again:
720 if (!sb_set_blocksize(sb, block_size)) {
721 printk(KERN_ERR "UFS: failed to set blocksize\n");
722 goto failed;
723 }
724
725 /*
726 * read ufs super block from device
727 */
728 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
729 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size);
730 }
731 else {
732 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
733 }
734 if (!ubh)
735 goto failed;
736
737
738 usb1 = ubh_get_usb_first(USPI_UBH);
739 usb2 = ubh_get_usb_second(USPI_UBH);
740 usb3 = ubh_get_usb_third(USPI_UBH);
741 usb = (struct ufs_super_block *)
742 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
743
744 /*
745 * Check ufs magic number
746 */
747 sbi->s_bytesex = BYTESEX_LE;
748 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
749 case UFS_MAGIC:
750 case UFS2_MAGIC:
751 case UFS_MAGIC_LFN:
752 case UFS_MAGIC_FEA:
753 case UFS_MAGIC_4GB:
754 goto magic_found;
755 }
756 sbi->s_bytesex = BYTESEX_BE;
757 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
758 case UFS_MAGIC:
759 case UFS2_MAGIC:
760 case UFS_MAGIC_LFN:
761 case UFS_MAGIC_FEA:
762 case UFS_MAGIC_4GB:
763 goto magic_found;
764 }
765
766 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
767 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
768 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
769 && uspi->s_sbbase < 256) {
770 ubh_brelse_uspi(uspi);
771 ubh = NULL;
772 uspi->s_sbbase += 8;
773 goto again;
774 }
775 if (!silent)
776 printk("ufs_read_super: bad magic number\n");
777 goto failed;
778
779 magic_found:
780 /*
781 * Check block and fragment sizes
782 */
783 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
784 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
785 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
786 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
787 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
788
789 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
790 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
791 uspi->s_fsize);
792 goto failed;
793 }
794 if (uspi->s_fsize < 512) {
795 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
796 uspi->s_fsize);
797 goto failed;
798 }
799 if (uspi->s_fsize > 4096) {
800 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
801 uspi->s_fsize);
802 goto failed;
803 }
804 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
805 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
806 uspi->s_bsize);
807 goto failed;
808 }
809 if (uspi->s_bsize < 4096) {
810 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
811 uspi->s_bsize);
812 goto failed;
813 }
814 if (uspi->s_bsize / uspi->s_fsize > 8) {
815 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
816 uspi->s_bsize / uspi->s_fsize);
817 goto failed;
818 }
819 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
820 ubh_brelse_uspi(uspi);
821 ubh = NULL;
822 block_size = uspi->s_fsize;
823 super_block_size = uspi->s_sbsize;
824 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
825 goto again;
826 }
827
828 #ifdef UFS_SUPER_DEBUG_MORE
829 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
830 ufs2_print_super_stuff(sb,usb);
831 else
832 ufs_print_super_stuff(sb, usb1, usb2, usb3);
833 #endif
834
835 /*
836 * Check, if file system was correctly unmounted.
837 * If not, make it read only.
838 */
839 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
840 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
841 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
842 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
843 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
844 switch(usb1->fs_clean) {
845 case UFS_FSCLEAN:
846 UFSD(("fs is clean\n"))
847 break;
848 case UFS_FSSTABLE:
849 UFSD(("fs is stable\n"))
850 break;
851 case UFS_FSOSF1:
852 UFSD(("fs is DEC OSF/1\n"))
853 break;
854 case UFS_FSACTIVE:
855 printk("ufs_read_super: fs is active\n");
856 sb->s_flags |= MS_RDONLY;
857 break;
858 case UFS_FSBAD:
859 printk("ufs_read_super: fs is bad\n");
860 sb->s_flags |= MS_RDONLY;
861 break;
862 default:
863 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
864 sb->s_flags |= MS_RDONLY;
865 break;
866 }
867 }
868 else {
869 printk("ufs_read_super: fs needs fsck\n");
870 sb->s_flags |= MS_RDONLY;
871 }
872
873 /*
874 * Read ufs_super_block into internal data structures
875 */
876 sb->s_op = &ufs_super_ops;
877 sb->dq_op = NULL; /***/
878 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
879
880 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
881 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
882 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
883 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
884 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
885 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
886
887 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
888 uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
889 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
890 }
891 else {
892 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
893 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
894 }
895
896 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
897 /* s_bsize already set */
898 /* s_fsize already set */
899 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
900 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
901 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
902 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
903 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
904 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
905 UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
906 uspi->s_fshift));
907 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
908 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
909 /* s_sbsize already set */
910 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
911 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
912 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
913 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
914 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
915 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
916 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
917 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
918 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
919 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
920 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
921 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
922 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
923 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
924 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
925 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
926 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
927 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
928 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
929 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
930 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
931 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
932 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
933 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
934
935 /*
936 * Compute another frequently used values
937 */
938 uspi->s_fpbmask = uspi->s_fpb - 1;
939 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
940 uspi->s_apbshift = uspi->s_bshift - 3;
941 }
942 else {
943 uspi->s_apbshift = uspi->s_bshift - 2;
944 }
945 uspi->s_2apbshift = uspi->s_apbshift * 2;
946 uspi->s_3apbshift = uspi->s_apbshift * 3;
947 uspi->s_apb = 1 << uspi->s_apbshift;
948 uspi->s_2apb = 1 << uspi->s_2apbshift;
949 uspi->s_3apb = 1 << uspi->s_3apbshift;
950 uspi->s_apbmask = uspi->s_apb - 1;
951 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
952 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
953 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
954 uspi->s_bpf = uspi->s_fsize << 3;
955 uspi->s_bpfshift = uspi->s_fshift + 3;
956 uspi->s_bpfmask = uspi->s_bpf - 1;
957 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
958 UFS_MOUNT_UFSTYPE_44BSD)
959 uspi->s_maxsymlinklen =
960 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
961
962 sbi->s_flags = flags;
963
964 inode = iget(sb, UFS_ROOTINO);
965 if (!inode || is_bad_inode(inode))
966 goto failed;
967 sb->s_root = d_alloc_root(inode);
968 if (!sb->s_root)
969 goto dalloc_failed;
970
971
972 /*
973 * Read cylinder group structures
974 */
975 if (!(sb->s_flags & MS_RDONLY))
976 if (!ufs_read_cylinder_structures(sb))
977 goto failed;
978
979 UFSD(("EXIT\n"))
980 return 0;
981
982 dalloc_failed:
983 iput(inode);
984 failed:
985 if (ubh)
986 ubh_brelse_uspi (uspi);
987 kfree (uspi);
988 kfree(sbi);
989 sb->s_fs_info = NULL;
990 UFSD(("EXIT (FAILED)\n"))
991 return -EINVAL;
992
993 failed_nomem:
994 UFSD(("EXIT (NOMEM)\n"))
995 return -ENOMEM;
996 }
997
998 static void ufs_write_super (struct super_block *sb) {
999 struct ufs_sb_private_info * uspi;
1000 struct ufs_super_block_first * usb1;
1001 struct ufs_super_block_third * usb3;
1002 unsigned flags;
1003
1004 lock_kernel();
1005
1006 UFSD(("ENTER\n"))
1007 flags = UFS_SB(sb)->s_flags;
1008 uspi = UFS_SB(sb)->s_uspi;
1009 usb1 = ubh_get_usb_first(USPI_UBH);
1010 usb3 = ubh_get_usb_third(USPI_UBH);
1011
1012 if (!(sb->s_flags & MS_RDONLY)) {
1013 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1014 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1015 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1016 ufs_set_fs_state(sb, usb1, usb3,
1017 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1018 ubh_mark_buffer_dirty (USPI_UBH);
1019 }
1020 sb->s_dirt = 0;
1021 UFSD(("EXIT\n"))
1022 unlock_kernel();
1023 }
1024
1025 static void ufs_put_super (struct super_block *sb)
1026 {
1027 struct ufs_sb_info * sbi = UFS_SB(sb);
1028
1029 UFSD(("ENTER\n"))
1030
1031 if (!(sb->s_flags & MS_RDONLY))
1032 ufs_put_cylinder_structures (sb);
1033
1034 ubh_brelse_uspi (sbi->s_uspi);
1035 kfree (sbi->s_uspi);
1036 kfree (sbi);
1037 sb->s_fs_info = NULL;
1038 return;
1039 }
1040
1041
1042 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1043 {
1044 struct ufs_sb_private_info * uspi;
1045 struct ufs_super_block_first * usb1;
1046 struct ufs_super_block_third * usb3;
1047 unsigned new_mount_opt, ufstype;
1048 unsigned flags;
1049
1050 uspi = UFS_SB(sb)->s_uspi;
1051 flags = UFS_SB(sb)->s_flags;
1052 usb1 = ubh_get_usb_first(USPI_UBH);
1053 usb3 = ubh_get_usb_third(USPI_UBH);
1054
1055 /*
1056 * Allow the "check" option to be passed as a remount option.
1057 * It is not possible to change ufstype option during remount
1058 */
1059 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1060 new_mount_opt = 0;
1061 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1062 if (!ufs_parse_options (data, &new_mount_opt))
1063 return -EINVAL;
1064 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1065 new_mount_opt |= ufstype;
1066 }
1067 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1068 printk("ufstype can't be changed during remount\n");
1069 return -EINVAL;
1070 }
1071
1072 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1073 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1074 return 0;
1075 }
1076
1077 /*
1078 * fs was mouted as rw, remounting ro
1079 */
1080 if (*mount_flags & MS_RDONLY) {
1081 ufs_put_cylinder_structures(sb);
1082 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1083 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1084 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1085 ufs_set_fs_state(sb, usb1, usb3,
1086 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1087 ubh_mark_buffer_dirty (USPI_UBH);
1088 sb->s_dirt = 0;
1089 sb->s_flags |= MS_RDONLY;
1090 }
1091 /*
1092 * fs was mounted as ro, remounting rw
1093 */
1094 else {
1095 #ifndef CONFIG_UFS_FS_WRITE
1096 printk("ufs was compiled with read-only support, "
1097 "can't be mounted as read-write\n");
1098 return -EINVAL;
1099 #else
1100 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1101 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1102 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1103 printk("this ufstype is read-only supported\n");
1104 return -EINVAL;
1105 }
1106 if (!ufs_read_cylinder_structures (sb)) {
1107 printk("failed during remounting\n");
1108 return -EPERM;
1109 }
1110 sb->s_flags &= ~MS_RDONLY;
1111 #endif
1112 }
1113 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1114 return 0;
1115 }
1116
1117 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1118 {
1119 struct ufs_sb_private_info * uspi;
1120 struct ufs_super_block_first * usb1;
1121 struct ufs_super_block * usb;
1122 unsigned flags = 0;
1123
1124 lock_kernel();
1125
1126 uspi = UFS_SB(sb)->s_uspi;
1127 usb1 = ubh_get_usb_first (USPI_UBH);
1128 usb = (struct ufs_super_block *)
1129 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1130
1131 flags = UFS_SB(sb)->s_flags;
1132 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1133 buf->f_type = UFS2_MAGIC;
1134 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1135 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1136 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1137 buf->f_ffree = fs64_to_cpu(sb,
1138 usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1139 }
1140 else {
1141 buf->f_type = UFS_MAGIC;
1142 buf->f_blocks = uspi->s_dsize;
1143 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1144 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1145 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1146 }
1147 buf->f_bsize = sb->s_blocksize;
1148 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1149 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1150 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1151 buf->f_namelen = UFS_MAXNAMLEN;
1152
1153 unlock_kernel();
1154
1155 return 0;
1156 }
1157
1158 static kmem_cache_t * ufs_inode_cachep;
1159
1160 static struct inode *ufs_alloc_inode(struct super_block *sb)
1161 {
1162 struct ufs_inode_info *ei;
1163 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1164 if (!ei)
1165 return NULL;
1166 ei->vfs_inode.i_version = 1;
1167 return &ei->vfs_inode;
1168 }
1169
1170 static void ufs_destroy_inode(struct inode *inode)
1171 {
1172 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1173 }
1174
1175 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1176 {
1177 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1178
1179 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1180 SLAB_CTOR_CONSTRUCTOR)
1181 inode_init_once(&ei->vfs_inode);
1182 }
1183
1184 static int init_inodecache(void)
1185 {
1186 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1187 sizeof(struct ufs_inode_info),
1188 0, SLAB_RECLAIM_ACCOUNT,
1189 init_once, NULL);
1190 if (ufs_inode_cachep == NULL)
1191 return -ENOMEM;
1192 return 0;
1193 }
1194
1195 static void destroy_inodecache(void)
1196 {
1197 if (kmem_cache_destroy(ufs_inode_cachep))
1198 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1199 }
1200
1201 #ifdef CONFIG_QUOTA
1202 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1203 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1204 #endif
1205
1206 static struct super_operations ufs_super_ops = {
1207 .alloc_inode = ufs_alloc_inode,
1208 .destroy_inode = ufs_destroy_inode,
1209 .read_inode = ufs_read_inode,
1210 .write_inode = ufs_write_inode,
1211 .delete_inode = ufs_delete_inode,
1212 .put_super = ufs_put_super,
1213 .write_super = ufs_write_super,
1214 .statfs = ufs_statfs,
1215 .remount_fs = ufs_remount,
1216 #ifdef CONFIG_QUOTA
1217 .quota_read = ufs_quota_read,
1218 .quota_write = ufs_quota_write,
1219 #endif
1220 };
1221
1222 #ifdef CONFIG_QUOTA
1223
1224 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1225 * acquiring the locks... As quota files are never truncated and quota code
1226 * itself serializes the operations (and noone else should touch the files)
1227 * we don't have to be afraid of races */
1228 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1229 size_t len, loff_t off)
1230 {
1231 struct inode *inode = sb_dqopt(sb)->files[type];
1232 sector_t blk = off >> sb->s_blocksize_bits;
1233 int err = 0;
1234 int offset = off & (sb->s_blocksize - 1);
1235 int tocopy;
1236 size_t toread;
1237 struct buffer_head *bh;
1238 loff_t i_size = i_size_read(inode);
1239
1240 if (off > i_size)
1241 return 0;
1242 if (off+len > i_size)
1243 len = i_size-off;
1244 toread = len;
1245 while (toread > 0) {
1246 tocopy = sb->s_blocksize - offset < toread ?
1247 sb->s_blocksize - offset : toread;
1248
1249 bh = ufs_bread(inode, blk, 0, &err);
1250 if (err)
1251 return err;
1252 if (!bh) /* A hole? */
1253 memset(data, 0, tocopy);
1254 else {
1255 memcpy(data, bh->b_data+offset, tocopy);
1256 brelse(bh);
1257 }
1258 offset = 0;
1259 toread -= tocopy;
1260 data += tocopy;
1261 blk++;
1262 }
1263 return len;
1264 }
1265
1266 /* Write to quotafile */
1267 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1268 const char *data, size_t len, loff_t off)
1269 {
1270 struct inode *inode = sb_dqopt(sb)->files[type];
1271 sector_t blk = off >> sb->s_blocksize_bits;
1272 int err = 0;
1273 int offset = off & (sb->s_blocksize - 1);
1274 int tocopy;
1275 size_t towrite = len;
1276 struct buffer_head *bh;
1277
1278 down(&inode->i_sem);
1279 while (towrite > 0) {
1280 tocopy = sb->s_blocksize - offset < towrite ?
1281 sb->s_blocksize - offset : towrite;
1282
1283 bh = ufs_bread(inode, blk, 1, &err);
1284 if (!bh)
1285 goto out;
1286 lock_buffer(bh);
1287 memcpy(bh->b_data+offset, data, tocopy);
1288 flush_dcache_page(bh->b_page);
1289 set_buffer_uptodate(bh);
1290 mark_buffer_dirty(bh);
1291 unlock_buffer(bh);
1292 brelse(bh);
1293 offset = 0;
1294 towrite -= tocopy;
1295 data += tocopy;
1296 blk++;
1297 }
1298 out:
1299 if (len == towrite)
1300 return err;
1301 if (inode->i_size < off+len-towrite)
1302 i_size_write(inode, off+len-towrite);
1303 inode->i_version++;
1304 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1305 mark_inode_dirty(inode);
1306 up(&inode->i_sem);
1307 return len - towrite;
1308 }
1309
1310 #endif
1311
1312 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1313 int flags, const char *dev_name, void *data)
1314 {
1315 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1316 }
1317
1318 static struct file_system_type ufs_fs_type = {
1319 .owner = THIS_MODULE,
1320 .name = "ufs",
1321 .get_sb = ufs_get_sb,
1322 .kill_sb = kill_block_super,
1323 .fs_flags = FS_REQUIRES_DEV,
1324 };
1325
1326 static int __init init_ufs_fs(void)
1327 {
1328 int err = init_inodecache();
1329 if (err)
1330 goto out1;
1331 err = register_filesystem(&ufs_fs_type);
1332 if (err)
1333 goto out;
1334 return 0;
1335 out:
1336 destroy_inodecache();
1337 out1:
1338 return err;
1339 }
1340
1341 static void __exit exit_ufs_fs(void)
1342 {
1343 unregister_filesystem(&ufs_fs_type);
1344 destroy_inodecache();
1345 }
1346
1347 module_init(init_ufs_fs)
1348 module_exit(exit_ufs_fs)
1349 MODULE_LICENSE("GPL");