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1da177e4
LT		 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
abf5d15f 93#ifdef CONFIG_UFS_DEBUG
1da177e4
LT		 94/*
95 * Print contents of ufs_super_block, useful for debugging
96 */
647b7e87
ED		 97static void ufs_print_super_stuff(struct super_block *sb, unsigned flags,
98 struct ufs_super_block_first *usb1,
99 struct ufs_super_block_second *usb2,
100 struct ufs_super_block_third *usb3)
1da177e4
LT		 101{
102 printk("ufs_print_super_stuff\n");
647b7e87
ED		 103 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
104 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
105 printk(" fs_size: %llu\n", (unsigned long long)
106 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
107 printk(" fs_dsize: %llu\n", (unsigned long long)
108 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
109 printk(" bsize: %u\n",
110 fs32_to_cpu(sb, usb1->fs_bsize));
111 printk(" fsize: %u\n",
112 fs32_to_cpu(sb, usb1->fs_fsize));
113 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
114 printk(" fs_sblockloc: %llu\n", (unsigned long long)
115 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
116 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
117 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
118 printk(" cs_nbfree(No of free blocks): %llu\n",
119 (unsigned long long)
120 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
121 } else {
122 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
123 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
124 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
125 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
126 printk(" cgoffset: %u\n",
127 fs32_to_cpu(sb, usb1->fs_cgoffset));
128 printk(" ~cgmask: 0x%x\n",
129 ~fs32_to_cpu(sb, usb1->fs_cgmask));
130 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
131 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
132 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
133 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
134 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
135 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
136 printk(" fragshift: %u\n",
137 fs32_to_cpu(sb, usb1->fs_fragshift));
138 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
139 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
140 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
141 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
142 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
143 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
144 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
145 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
146 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
147 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
148 printk(" fstodb: %u\n",
149 fs32_to_cpu(sb, usb1->fs_fsbtodb));
150 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
151 printk(" ndir %u\n",
152 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
153 printk(" nifree %u\n",
154 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
155 printk(" nbfree %u\n",
156 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
157 printk(" nffree %u\n",
158 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
159 }
1da177e4
LT		 160 printk("\n");
161}
162
163/*
164 * Print contents of ufs_cylinder_group, useful for debugging
165 */
647b7e87
ED		 166static void ufs_print_cylinder_stuff(struct super_block *sb,
167 struct ufs_cylinder_group *cg)
1da177e4
LT		 168{
169 printk("\nufs_print_cylinder_stuff\n");
96710b29 170 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
1da177e4
LT		 171 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
172 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
173 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
174 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
175 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
176 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
177 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
178 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
179 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
180 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
181 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
182 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
183 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
184 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
185 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
186 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
187 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
188 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
189 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
190 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
191 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
192 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
193 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
647b7e87
ED		 194 printk(" clustersumoff %u\n",
195 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
196 printk(" clusteroff %u\n",
197 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
198 printk(" nclusterblks %u\n",
199 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
1da177e4
LT		 200 printk("\n");
201}
647b7e87
ED		 202#else
203# define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/
204# define ufs_print_cylinder_stuff(sb, cg) /**/
abf5d15f 205#endif /* CONFIG_UFS_DEBUG */
1da177e4
LT		 206
207static struct super_operations ufs_super_ops;
208
209static char error_buf[1024];
210
211void ufs_error (struct super_block * sb, const char * function,
212 const char * fmt, ...)
213{
214 struct ufs_sb_private_info * uspi;
215 struct ufs_super_block_first * usb1;
216 va_list args;
217
218 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 219 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 220
221 if (!(sb->s_flags & MS_RDONLY)) {
222 usb1->fs_clean = UFS_FSBAD;
9695ef16 223 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 224 sb->s_dirt = 1;
225 sb->s_flags |= MS_RDONLY;
226 }
227 va_start (args, fmt);
228 vsprintf (error_buf, fmt, args);
229 va_end (args);
230 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
231 case UFS_MOUNT_ONERROR_PANIC:
232 panic ("UFS-fs panic (device %s): %s: %s\n",
233 sb->s_id, function, error_buf);
234
235 case UFS_MOUNT_ONERROR_LOCK:
236 case UFS_MOUNT_ONERROR_UMOUNT:
237 case UFS_MOUNT_ONERROR_REPAIR:
238 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
239 sb->s_id, function, error_buf);
240 }
241}
242
243void ufs_panic (struct super_block * sb, const char * function,
244 const char * fmt, ...)
245{
246 struct ufs_sb_private_info * uspi;
247 struct ufs_super_block_first * usb1;
248 va_list args;
249
250 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 251 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 252
253 if (!(sb->s_flags & MS_RDONLY)) {
254 usb1->fs_clean = UFS_FSBAD;
9695ef16 255 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 256 sb->s_dirt = 1;
257 }
258 va_start (args, fmt);
259 vsprintf (error_buf, fmt, args);
260 va_end (args);
261 sb->s_flags |= MS_RDONLY;
262 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
263 sb->s_id, function, error_buf);
264}
265
266void ufs_warning (struct super_block * sb, const char * function,
267 const char * fmt, ...)
268{
269 va_list args;
270
271 va_start (args, fmt);
272 vsprintf (error_buf, fmt, args);
273 va_end (args);
274 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
275 sb->s_id, function, error_buf);
276}
277
278enum {
279 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
280 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
281 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
282 Opt_onerror_umount, Opt_onerror_repair, Opt_err
283};
284
285static match_table_t tokens = {
286 {Opt_type_old, "ufstype=old"},
287 {Opt_type_sunx86, "ufstype=sunx86"},
288 {Opt_type_sun, "ufstype=sun"},
289 {Opt_type_44bsd, "ufstype=44bsd"},
290 {Opt_type_ufs2, "ufstype=ufs2"},
291 {Opt_type_ufs2, "ufstype=5xbsd"},
292 {Opt_type_hp, "ufstype=hp"},
293 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
294 {Opt_type_nextstep, "ufstype=nextstep"},
295 {Opt_type_openstep, "ufstype=openstep"},
296 {Opt_onerror_panic, "onerror=panic"},
297 {Opt_onerror_lock, "onerror=lock"},
298 {Opt_onerror_umount, "onerror=umount"},
299 {Opt_onerror_repair, "onerror=repair"},
300 {Opt_err, NULL}
301};
302
303static int ufs_parse_options (char * options, unsigned * mount_options)
304{
305 char * p;
306
abf5d15f 307 UFSD("ENTER\n");
1da177e4
LT		 308
309 if (!options)
310 return 1;
311
312 while ((p = strsep(&options, ",")) != NULL) {
313 substring_t args[MAX_OPT_ARGS];
314 int token;
315 if (!*p)
316 continue;
317
318 token = match_token(p, tokens, args);
319 switch (token) {
320 case Opt_type_old:
321 ufs_clear_opt (*mount_options, UFSTYPE);
322 ufs_set_opt (*mount_options, UFSTYPE_OLD);
323 break;
324 case Opt_type_sunx86:
325 ufs_clear_opt (*mount_options, UFSTYPE);
326 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
327 break;
328 case Opt_type_sun:
329 ufs_clear_opt (*mount_options, UFSTYPE);
330 ufs_set_opt (*mount_options, UFSTYPE_SUN);
331 break;
332 case Opt_type_44bsd:
333 ufs_clear_opt (*mount_options, UFSTYPE);
334 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
335 break;
336 case Opt_type_ufs2:
337 ufs_clear_opt(*mount_options, UFSTYPE);
338 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
339 break;
340 case Opt_type_hp:
341 ufs_clear_opt (*mount_options, UFSTYPE);
342 ufs_set_opt (*mount_options, UFSTYPE_HP);
343 break;
344 case Opt_type_nextstepcd:
345 ufs_clear_opt (*mount_options, UFSTYPE);
346 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
347 break;
348 case Opt_type_nextstep:
349 ufs_clear_opt (*mount_options, UFSTYPE);
350 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
351 break;
352 case Opt_type_openstep:
353 ufs_clear_opt (*mount_options, UFSTYPE);
354 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
355 break;
356 case Opt_onerror_panic:
357 ufs_clear_opt (*mount_options, ONERROR);
358 ufs_set_opt (*mount_options, ONERROR_PANIC);
359 break;
360 case Opt_onerror_lock:
361 ufs_clear_opt (*mount_options, ONERROR);
362 ufs_set_opt (*mount_options, ONERROR_LOCK);
363 break;
364 case Opt_onerror_umount:
365 ufs_clear_opt (*mount_options, ONERROR);
366 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
367 break;
368 case Opt_onerror_repair:
369 printk("UFS-fs: Unable to do repair on error, "
370 "will lock lock instead\n");
371 ufs_clear_opt (*mount_options, ONERROR);
372 ufs_set_opt (*mount_options, ONERROR_REPAIR);
373 break;
374 default:
375 printk("UFS-fs: Invalid option: \"%s\" "
376 "or missing value\n", p);
377 return 0;
378 }
379 }
380 return 1;
381}
382
383/*
384 * Read on-disk structures associated with cylinder groups
385 */
e295cfcb
ED		 386static int ufs_read_cylinder_structures (struct super_block *sb)
387{
647b7e87
ED		 388 struct ufs_sb_info *sbi = UFS_SB(sb);
389 struct ufs_sb_private_info *uspi = sbi->s_uspi;
390 struct ufs_super_block_third *usb3;
1da177e4
LT		 391 struct ufs_buffer_head * ubh;
392 unsigned char * base, * space;
393 unsigned size, blks, i;
394 unsigned flags = 0;
395
abf5d15f 396 UFSD("ENTER\n");
1da177e4 397
647b7e87 398 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 399
400 flags = UFS_SB(sb)->s_flags;
401
402 /*
403 * Read cs structures from (usually) first data block
404 * on the device.
405 */
406 size = uspi->s_cssize;
407 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
408 base = space = kmalloc(size, GFP_KERNEL);
409 if (!base)
410 goto failed;
e295cfcb 411 sbi->s_csp = (struct ufs_csum *)space;
1da177e4
LT		 412 for (i = 0; i < blks; i += uspi->s_fpb) {
413 size = uspi->s_bsize;
414 if (i + uspi->s_fpb > blks)
415 size = (blks - i) * uspi->s_fsize;
416
7b4ee73e 417 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 418 ubh = ubh_bread(sb,
647b7e87 419 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
7b4ee73e 420 else
1da177e4 421 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
7b4ee73e
E		 422
423 if (!ubh)
424 goto failed;
425
426 ubh_ubhcpymem (space, ubh, size);
7b4ee73e 427
1da177e4
LT		 428 space += size;
429 ubh_brelse (ubh);
430 ubh = NULL;
431 }
432
433 /*
434 * Read cylinder group (we read only first fragment from block
435 * at this time) and prepare internal data structures for cg caching.
436 */
437 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
438 goto failed;
439 for (i = 0; i < uspi->s_ncg; i++)
440 sbi->s_ucg[i] = NULL;
441 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
442 sbi->s_ucpi[i] = NULL;
443 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
444 }
445 for (i = 0; i < uspi->s_ncg; i++) {
abf5d15f 446 UFSD("read cg %u\n", i);
1da177e4
LT		 447 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
448 goto failed;
449 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
450 goto failed;
647b7e87 451
1da177e4 452 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
1da177e4
LT		 453 }
454 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
455 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
456 goto failed;
457 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
458 }
459 sbi->s_cg_loaded = 0;
abf5d15f 460 UFSD("EXIT\n");
1da177e4
LT		 461 return 1;
462
463failed:
f99d49ad 464 kfree (base);
1da177e4
LT		 465 if (sbi->s_ucg) {
466 for (i = 0; i < uspi->s_ncg; i++)
f99d49ad
JJ		 467 if (sbi->s_ucg[i])
468 brelse (sbi->s_ucg[i]);
1da177e4
LT		 469 kfree (sbi->s_ucg);
470 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
f99d49ad 471 kfree (sbi->s_ucpi[i]);
1da177e4 472 }
abf5d15f 473 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 474 return 0;
475}
476
477/*
478 * Put on-disk structures associated with cylinder groups and
479 * write them back to disk
480 */
e295cfcb
ED		 481static void ufs_put_cylinder_structures (struct super_block *sb)
482{
1da177e4
LT		 483 struct ufs_sb_info * sbi = UFS_SB(sb);
484 struct ufs_sb_private_info * uspi;
485 struct ufs_buffer_head * ubh;
486 unsigned char * base, * space;
487 unsigned blks, size, i;
488
abf5d15f 489 UFSD("ENTER\n");
1da177e4
LT		 490
491 uspi = sbi->s_uspi;
492
493 size = uspi->s_cssize;
494 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
e295cfcb 495 base = space = (char*) sbi->s_csp;
1da177e4
LT		 496 for (i = 0; i < blks; i += uspi->s_fpb) {
497 size = uspi->s_bsize;
498 if (i + uspi->s_fpb > blks)
499 size = (blks - i) * uspi->s_fsize;
500 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
501 ubh_memcpyubh (ubh, space, size);
502 space += size;
503 ubh_mark_buffer_uptodate (ubh, 1);
504 ubh_mark_buffer_dirty (ubh);
505 ubh_brelse (ubh);
506 }
507 for (i = 0; i < sbi->s_cg_loaded; i++) {
508 ufs_put_cylinder (sb, i);
509 kfree (sbi->s_ucpi[i]);
510 }
511 for (; i < UFS_MAX_GROUP_LOADED; i++)
512 kfree (sbi->s_ucpi[i]);
513 for (i = 0; i < uspi->s_ncg; i++)
514 brelse (sbi->s_ucg[i]);
515 kfree (sbi->s_ucg);
516 kfree (base);
abf5d15f 517 UFSD("EXIT\n");
1da177e4
LT		 518}
519
520static int ufs_fill_super(struct super_block *sb, void *data, int silent)
521{
522 struct ufs_sb_info * sbi;
523 struct ufs_sb_private_info * uspi;
524 struct ufs_super_block_first * usb1;
525 struct ufs_super_block_second * usb2;
526 struct ufs_super_block_third * usb3;
527 struct ufs_super_block *usb;
528 struct ufs_buffer_head * ubh;
529 struct inode *inode;
530 unsigned block_size, super_block_size;
531 unsigned flags;
7b4ee73e 532 unsigned super_block_offset;
1da177e4
LT		 533
534 uspi = NULL;
535 ubh = NULL;
536 flags = 0;
537
abf5d15f 538 UFSD("ENTER\n");
1da177e4
LT		 539
540 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
541 if (!sbi)
542 goto failed_nomem;
543 sb->s_fs_info = sbi;
544 memset(sbi, 0, sizeof(struct ufs_sb_info));
545
abf5d15f 546 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
1da177e4
LT		 547
548#ifndef CONFIG_UFS_FS_WRITE
549 if (!(sb->s_flags & MS_RDONLY)) {
550 printk("ufs was compiled with read-only support, "
551 "can't be mounted as read-write\n");
552 goto failed;
553 }
554#endif
555 /*
556 * Set default mount options
557 * Parse mount options
558 */
559 sbi->s_mount_opt = 0;
560 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
561 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
562 printk("wrong mount options\n");
563 goto failed;
564 }
565 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
566 if (!silent)
567 printk("You didn't specify the type of your ufs filesystem\n\n"
568 "mount -t ufs -o ufstype="
c690a722 569 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
1da177e4
LT		 570 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
571 "default is ufstype=old\n");
572 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
573 }
574
575 sbi->s_uspi = uspi =
576 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
577 if (!uspi)
578 goto failed;
579
7b4ee73e
E		 580 super_block_offset=UFS_SBLOCK;
581
1da177e4
LT		 582 /* Keep 2Gig file limit. Some UFS variants need to override
583 this but as I don't know which I'll let those in the know loosen
584 the rules */
1da177e4
LT		 585 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
586 case UFS_MOUNT_UFSTYPE_44BSD:
abf5d15f 587 UFSD("ufstype=44bsd\n");
1da177e4
LT		 588 uspi->s_fsize = block_size = 512;
589 uspi->s_fmask = ~(512 - 1);
590 uspi->s_fshift = 9;
591 uspi->s_sbsize = super_block_size = 1536;
592 uspi->s_sbbase = 0;
593 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
594 break;
595 case UFS_MOUNT_UFSTYPE_UFS2:
abf5d15f 596 UFSD("ufstype=ufs2\n");
7b4ee73e 597 super_block_offset=SBLOCK_UFS2;
1da177e4
LT		 598 uspi->s_fsize = block_size = 512;
599 uspi->s_fmask = ~(512 - 1);
600 uspi->s_fshift = 9;
601 uspi->s_sbsize = super_block_size = 1536;
602 uspi->s_sbbase = 0;
603 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
604 if (!(sb->s_flags & MS_RDONLY)) {
605 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
606 sb->s_flags |= MS_RDONLY;
607 }
608 break;
609
610 case UFS_MOUNT_UFSTYPE_SUN:
abf5d15f 611 UFSD("ufstype=sun\n");
1da177e4
LT		 612 uspi->s_fsize = block_size = 1024;
613 uspi->s_fmask = ~(1024 - 1);
614 uspi->s_fshift = 10;
615 uspi->s_sbsize = super_block_size = 2048;
616 uspi->s_sbbase = 0;
617 uspi->s_maxsymlinklen = 56;
618 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
619 break;
620
621 case UFS_MOUNT_UFSTYPE_SUNx86:
abf5d15f 622 UFSD("ufstype=sunx86\n");
1da177e4
LT		 623 uspi->s_fsize = block_size = 1024;
624 uspi->s_fmask = ~(1024 - 1);
625 uspi->s_fshift = 10;
626 uspi->s_sbsize = super_block_size = 2048;
627 uspi->s_sbbase = 0;
628 uspi->s_maxsymlinklen = 56;
629 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
630 break;
631
632 case UFS_MOUNT_UFSTYPE_OLD:
abf5d15f 633 UFSD("ufstype=old\n");
1da177e4
LT		 634 uspi->s_fsize = block_size = 1024;
635 uspi->s_fmask = ~(1024 - 1);
636 uspi->s_fshift = 10;
637 uspi->s_sbsize = super_block_size = 2048;
638 uspi->s_sbbase = 0;
639 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
640 if (!(sb->s_flags & MS_RDONLY)) {
641 if (!silent)
642 printk(KERN_INFO "ufstype=old is supported read-only\n");
643 sb->s_flags |= MS_RDONLY;
644 }
645 break;
646
647 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
abf5d15f 648 UFSD("ufstype=nextstep\n");
1da177e4
LT		 649 uspi->s_fsize = block_size = 1024;
650 uspi->s_fmask = ~(1024 - 1);
651 uspi->s_fshift = 10;
652 uspi->s_sbsize = super_block_size = 2048;
653 uspi->s_sbbase = 0;
654 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
655 if (!(sb->s_flags & MS_RDONLY)) {
656 if (!silent)
657 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
658 sb->s_flags |= MS_RDONLY;
659 }
660 break;
661
662 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
abf5d15f 663 UFSD("ufstype=nextstep-cd\n");
1da177e4
LT		 664 uspi->s_fsize = block_size = 2048;
665 uspi->s_fmask = ~(2048 - 1);
666 uspi->s_fshift = 11;
667 uspi->s_sbsize = super_block_size = 2048;
668 uspi->s_sbbase = 0;
669 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
670 if (!(sb->s_flags & MS_RDONLY)) {
671 if (!silent)
672 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
673 sb->s_flags |= MS_RDONLY;
674 }
675 break;
676
677 case UFS_MOUNT_UFSTYPE_OPENSTEP:
abf5d15f 678 UFSD("ufstype=openstep\n");
1da177e4
LT		 679 uspi->s_fsize = block_size = 1024;
680 uspi->s_fmask = ~(1024 - 1);
681 uspi->s_fshift = 10;
682 uspi->s_sbsize = super_block_size = 2048;
683 uspi->s_sbbase = 0;
684 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
685 if (!(sb->s_flags & MS_RDONLY)) {
686 if (!silent)
687 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
688 sb->s_flags |= MS_RDONLY;
689 }
690 break;
691
692 case UFS_MOUNT_UFSTYPE_HP:
abf5d15f 693 UFSD("ufstype=hp\n");
1da177e4
LT		 694 uspi->s_fsize = block_size = 1024;
695 uspi->s_fmask = ~(1024 - 1);
696 uspi->s_fshift = 10;
697 uspi->s_sbsize = super_block_size = 2048;
698 uspi->s_sbbase = 0;
699 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
700 if (!(sb->s_flags & MS_RDONLY)) {
701 if (!silent)
702 printk(KERN_INFO "ufstype=hp is supported read-only\n");
703 sb->s_flags |= MS_RDONLY;
704 }
705 break;
706 default:
707 if (!silent)
708 printk("unknown ufstype\n");
709 goto failed;
710 }
711
712again:
713 if (!sb_set_blocksize(sb, block_size)) {
714 printk(KERN_ERR "UFS: failed to set blocksize\n");
715 goto failed;
716 }
717
718 /*
719 * read ufs super block from device
720 */
7b4ee73e
E		 721
722 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
723
1da177e4
LT		 724 if (!ubh)
725 goto failed;
726
727
7b4ee73e
E		 728 usb1 = ubh_get_usb_first(uspi);
729 usb2 = ubh_get_usb_second(uspi);
730 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 731 usb = (struct ufs_super_block *)
732 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
733
734 /*
735 * Check ufs magic number
736 */
737 sbi->s_bytesex = BYTESEX_LE;
738 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
739 case UFS_MAGIC:
740 case UFS2_MAGIC:
741 case UFS_MAGIC_LFN:
742 case UFS_MAGIC_FEA:
743 case UFS_MAGIC_4GB:
744 goto magic_found;
745 }
746 sbi->s_bytesex = BYTESEX_BE;
747 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
748 case UFS_MAGIC:
749 case UFS2_MAGIC:
750 case UFS_MAGIC_LFN:
751 case UFS_MAGIC_FEA:
752 case UFS_MAGIC_4GB:
753 goto magic_found;
754 }
755
756 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
757 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
758 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
759 && uspi->s_sbbase < 256) {
760 ubh_brelse_uspi(uspi);
761 ubh = NULL;
762 uspi->s_sbbase += 8;
763 goto again;
764 }
765 if (!silent)
766 printk("ufs_read_super: bad magic number\n");
767 goto failed;
768
769magic_found:
770 /*
771 * Check block and fragment sizes
772 */
773 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
774 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
775 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
776 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
777 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
778
779 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
780 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
781 uspi->s_fsize);
782 goto failed;
783 }
784 if (uspi->s_fsize < 512) {
785 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
786 uspi->s_fsize);
787 goto failed;
788 }
789 if (uspi->s_fsize > 4096) {
790 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
791 uspi->s_fsize);
792 goto failed;
793 }
794 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
795 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
796 uspi->s_bsize);
797 goto failed;
798 }
799 if (uspi->s_bsize < 4096) {
800 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
801 uspi->s_bsize);
802 goto failed;
803 }
804 if (uspi->s_bsize / uspi->s_fsize > 8) {
805 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
806 uspi->s_bsize / uspi->s_fsize);
807 goto failed;
808 }
809 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
810 ubh_brelse_uspi(uspi);
811 ubh = NULL;
812 block_size = uspi->s_fsize;
813 super_block_size = uspi->s_sbsize;
abf5d15f 814 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1da177e4
LT		 815 goto again;
816 }
817
647b7e87
ED		 818
819 ufs_print_super_stuff(sb, flags, usb1, usb2, usb3);
1da177e4
LT		 820
821 /*
822 * Check, if file system was correctly unmounted.
823 * If not, make it read only.
824 */
825 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
826 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
827 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
828 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
829 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
830 switch(usb1->fs_clean) {
831 case UFS_FSCLEAN:
abf5d15f 832 UFSD("fs is clean\n");
1da177e4
LT		 833 break;
834 case UFS_FSSTABLE:
abf5d15f 835 UFSD("fs is stable\n");
1da177e4
LT		 836 break;
837 case UFS_FSOSF1:
abf5d15f 838 UFSD("fs is DEC OSF/1\n");
1da177e4
LT		 839 break;
840 case UFS_FSACTIVE:
841 printk("ufs_read_super: fs is active\n");
842 sb->s_flags |= MS_RDONLY;
843 break;
844 case UFS_FSBAD:
845 printk("ufs_read_super: fs is bad\n");
846 sb->s_flags |= MS_RDONLY;
847 break;
848 default:
849 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
850 sb->s_flags |= MS_RDONLY;
851 break;
852 }
853 }
854 else {
855 printk("ufs_read_super: fs needs fsck\n");
856 sb->s_flags |= MS_RDONLY;
857 }
858
859 /*
860 * Read ufs_super_block into internal data structures
861 */
862 sb->s_op = &ufs_super_ops;
863 sb->dq_op = NULL; /***/
864 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
865
866 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
867 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
868 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
869 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
870 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
871 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
872
873 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
647b7e87
ED		 874 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
875 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
876 } else {
1da177e4
LT		 877 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
878 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
879 }
880
881 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
882 /* s_bsize already set */
883 /* s_fsize already set */
884 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
885 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
886 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
887 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
888 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
889 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
abf5d15f
ED		 890 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
891 uspi->s_fshift);
1da177e4
LT		 892 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
893 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
894 /* s_sbsize already set */
895 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
896 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
897 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
898 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
899 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
900 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
901 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
902 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
903 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
904 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
905 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
906 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
907 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
908 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
909 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
910 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
647b7e87
ED		 911 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
912 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1da177e4
LT		 913 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
914 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
915 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
916 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
917 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
918 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
919
920 /*
921 * Compute another frequently used values
922 */
923 uspi->s_fpbmask = uspi->s_fpb - 1;
abf5d15f 924 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 925 uspi->s_apbshift = uspi->s_bshift - 3;
abf5d15f 926 else
1da177e4 927 uspi->s_apbshift = uspi->s_bshift - 2;
abf5d15f 928
1da177e4
LT		 929 uspi->s_2apbshift = uspi->s_apbshift * 2;
930 uspi->s_3apbshift = uspi->s_apbshift * 3;
931 uspi->s_apb = 1 << uspi->s_apbshift;
932 uspi->s_2apb = 1 << uspi->s_2apbshift;
933 uspi->s_3apb = 1 << uspi->s_3apbshift;
934 uspi->s_apbmask = uspi->s_apb - 1;
935 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
936 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
937 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
938 uspi->s_bpf = uspi->s_fsize << 3;
939 uspi->s_bpfshift = uspi->s_fshift + 3;
940 uspi->s_bpfmask = uspi->s_bpf - 1;
941 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
942 UFS_MOUNT_UFSTYPE_44BSD)
943 uspi->s_maxsymlinklen =
647b7e87 944 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1da177e4
LT		 945
946 sbi->s_flags = flags;
947
948 inode = iget(sb, UFS_ROOTINO);
949 if (!inode || is_bad_inode(inode))
950 goto failed;
951 sb->s_root = d_alloc_root(inode);
952 if (!sb->s_root)
953 goto dalloc_failed;
954
955
956 /*
957 * Read cylinder group structures
958 */
959 if (!(sb->s_flags & MS_RDONLY))
960 if (!ufs_read_cylinder_structures(sb))
961 goto failed;
962
abf5d15f 963 UFSD("EXIT\n");
1da177e4
LT		 964 return 0;
965
966dalloc_failed:
967 iput(inode);
968failed:
f99d49ad
JJ		 969 if (ubh)
970 ubh_brelse_uspi (uspi);
971 kfree (uspi);
972 kfree(sbi);
1da177e4 973 sb->s_fs_info = NULL;
abf5d15f 974 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 975 return -EINVAL;
976
977failed_nomem:
abf5d15f 978 UFSD("EXIT (NOMEM)\n");
1da177e4
LT		 979 return -ENOMEM;
980}
981
647b7e87
ED		 982static void ufs_write_super(struct super_block *sb)
983{
1da177e4
LT		 984 struct ufs_sb_private_info * uspi;
985 struct ufs_super_block_first * usb1;
986 struct ufs_super_block_third * usb3;
987 unsigned flags;
988
989 lock_kernel();
990
abf5d15f 991 UFSD("ENTER\n");
1da177e4
LT		 992 flags = UFS_SB(sb)->s_flags;
993 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e
E		 994 usb1 = ubh_get_usb_first(uspi);
995 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 996
997 if (!(sb->s_flags & MS_RDONLY)) {
998 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
999 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1000 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1001 ufs_set_fs_state(sb, usb1, usb3,
1002 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1003 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1da177e4
LT		 1004 }
1005 sb->s_dirt = 0;
abf5d15f 1006 UFSD("EXIT\n");
1da177e4
LT		 1007 unlock_kernel();
1008}
1009
abf5d15f 1010static void ufs_put_super(struct super_block *sb)
1da177e4
LT		 1011{
1012 struct ufs_sb_info * sbi = UFS_SB(sb);
1013
abf5d15f 1014 UFSD("ENTER\n");
1da177e4
LT		 1015
1016 if (!(sb->s_flags & MS_RDONLY))
1017 ufs_put_cylinder_structures (sb);
1018
1019 ubh_brelse_uspi (sbi->s_uspi);
1020 kfree (sbi->s_uspi);
1021 kfree (sbi);
1022 sb->s_fs_info = NULL;
647b7e87 1023 UFSD("EXIT\n");
1da177e4
LT		 1024 return;
1025}
1026
1027
1028static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1029{
1030 struct ufs_sb_private_info * uspi;
1031 struct ufs_super_block_first * usb1;
1032 struct ufs_super_block_third * usb3;
1033 unsigned new_mount_opt, ufstype;
1034 unsigned flags;
1035
1036 uspi = UFS_SB(sb)->s_uspi;
1037 flags = UFS_SB(sb)->s_flags;
7b4ee73e
E		 1038 usb1 = ubh_get_usb_first(uspi);
1039 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1040
1041 /*
1042 * Allow the "check" option to be passed as a remount option.
1043 * It is not possible to change ufstype option during remount
1044 */
1045 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1046 new_mount_opt = 0;
1047 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1048 if (!ufs_parse_options (data, &new_mount_opt))
1049 return -EINVAL;
1050 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1051 new_mount_opt |= ufstype;
1052 }
1053 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1054 printk("ufstype can't be changed during remount\n");
1055 return -EINVAL;
1056 }
1057
1058 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1059 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1060 return 0;
1061 }
1062
1063 /*
1064 * fs was mouted as rw, remounting ro
1065 */
1066 if (*mount_flags & MS_RDONLY) {
1067 ufs_put_cylinder_structures(sb);
1068 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1069 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1070 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1071 ufs_set_fs_state(sb, usb1, usb3,
1072 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1073 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1da177e4
LT		 1074 sb->s_dirt = 0;
1075 sb->s_flags |= MS_RDONLY;
1076 }
1077 /*
1078 * fs was mounted as ro, remounting rw
1079 */
1080 else {
1081#ifndef CONFIG_UFS_FS_WRITE
1082 printk("ufs was compiled with read-only support, "
1083 "can't be mounted as read-write\n");
1084 return -EINVAL;
1085#else
1086 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1087 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1088 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1089 printk("this ufstype is read-only supported\n");
1090 return -EINVAL;
1091 }
1092 if (!ufs_read_cylinder_structures (sb)) {
1093 printk("failed during remounting\n");
1094 return -EPERM;
1095 }
1096 sb->s_flags &= ~MS_RDONLY;
1097#endif
1098 }
1099 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1100 return 0;
1101}
1102
647b7e87 1103static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1104{
726c3342 1105 struct super_block *sb = dentry->d_sb;
647b7e87
ED		 1106 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1107 unsigned flags = UFS_SB(sb)->s_flags;
1108 struct ufs_super_block_first *usb1;
1109 struct ufs_super_block_second *usb2;
1110 struct ufs_super_block_third *usb3;
1da177e4
LT		 1111
1112 lock_kernel();
1113
647b7e87
ED		 1114 usb1 = ubh_get_usb_first(uspi);
1115 usb2 = ubh_get_usb_second(uspi);
1116 usb3 = ubh_get_usb_third(uspi);
1da177e4 1117
1da177e4
LT		 1118 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1119 buf->f_type = UFS2_MAGIC;
647b7e87
ED		 1120 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1121 buf->f_bfree = ufs_blkstofrags(
1122 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)) +
1123 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
1124 buf->f_ffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
1125 } else {
1da177e4
LT		 1126 buf->f_type = UFS_MAGIC;
1127 buf->f_blocks = uspi->s_dsize;
1128 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1129 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1130 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1131 }
1132 buf->f_bsize = sb->s_blocksize;
1133 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1134 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1135 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1136 buf->f_namelen = UFS_MAXNAMLEN;
1137
1138 unlock_kernel();
1139
1140 return 0;
1141}
1142
1143static kmem_cache_t * ufs_inode_cachep;
1144
1145static struct inode *ufs_alloc_inode(struct super_block *sb)
1146{
1147 struct ufs_inode_info *ei;
1148 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1149 if (!ei)
1150 return NULL;
1151 ei->vfs_inode.i_version = 1;
1152 return &ei->vfs_inode;
1153}
1154
1155static void ufs_destroy_inode(struct inode *inode)
1156{
1157 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1158}
1159
1160static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1161{
1162 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1163
1164 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1165 SLAB_CTOR_CONSTRUCTOR)
1166 inode_init_once(&ei->vfs_inode);
1167}
1168
1169static int init_inodecache(void)
1170{
1171 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1172 sizeof(struct ufs_inode_info),
fffb60f9
PJ		 1173 0, (SLAB_RECLAIM_ACCOUNT|
1174 SLAB_MEM_SPREAD),
1da177e4
LT		 1175 init_once, NULL);
1176 if (ufs_inode_cachep == NULL)
1177 return -ENOMEM;
1178 return 0;
1179}
1180
1181static void destroy_inodecache(void)
1182{
1183 if (kmem_cache_destroy(ufs_inode_cachep))
1184 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1185}
1186
1187#ifdef CONFIG_QUOTA
1188static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1189static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1190#endif
1191
1192static struct super_operations ufs_super_ops = {
1193 .alloc_inode = ufs_alloc_inode,
1194 .destroy_inode = ufs_destroy_inode,
1195 .read_inode = ufs_read_inode,
1196 .write_inode = ufs_write_inode,
1197 .delete_inode = ufs_delete_inode,
1198 .put_super = ufs_put_super,
1199 .write_super = ufs_write_super,
1200 .statfs = ufs_statfs,
1201 .remount_fs = ufs_remount,
1202#ifdef CONFIG_QUOTA
1203 .quota_read = ufs_quota_read,
1204 .quota_write = ufs_quota_write,
1205#endif
1206};
1207
1208#ifdef CONFIG_QUOTA
1209
1210/* Read data from quotafile - avoid pagecache and such because we cannot afford
1211 * acquiring the locks... As quota files are never truncated and quota code
1212 * itself serializes the operations (and noone else should touch the files)
1213 * we don't have to be afraid of races */
1214static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1215 size_t len, loff_t off)
1216{
1217 struct inode *inode = sb_dqopt(sb)->files[type];
1218 sector_t blk = off >> sb->s_blocksize_bits;
1219 int err = 0;
1220 int offset = off & (sb->s_blocksize - 1);
1221 int tocopy;
1222 size_t toread;
1223 struct buffer_head *bh;
1224 loff_t i_size = i_size_read(inode);
1225
1226 if (off > i_size)
1227 return 0;
1228 if (off+len > i_size)
1229 len = i_size-off;
1230 toread = len;
1231 while (toread > 0) {
1232 tocopy = sb->s_blocksize - offset < toread ?
1233 sb->s_blocksize - offset : toread;
1234
1235 bh = ufs_bread(inode, blk, 0, &err);
1236 if (err)
1237 return err;
1238 if (!bh) /* A hole? */
1239 memset(data, 0, tocopy);
1240 else {
1241 memcpy(data, bh->b_data+offset, tocopy);
1242 brelse(bh);
1243 }
1244 offset = 0;
1245 toread -= tocopy;
1246 data += tocopy;
1247 blk++;
1248 }
1249 return len;
1250}
1251
1252/* Write to quotafile */
1253static ssize_t ufs_quota_write(struct super_block *sb, int type,
1254 const char *data, size_t len, loff_t off)
1255{
1256 struct inode *inode = sb_dqopt(sb)->files[type];
1257 sector_t blk = off >> sb->s_blocksize_bits;
1258 int err = 0;
1259 int offset = off & (sb->s_blocksize - 1);
1260 int tocopy;
1261 size_t towrite = len;
1262 struct buffer_head *bh;
1263
1b1dcc1b 1264 mutex_lock(&inode->i_mutex);
1da177e4
LT		 1265 while (towrite > 0) {
1266 tocopy = sb->s_blocksize - offset < towrite ?
1267 sb->s_blocksize - offset : towrite;
1268
1269 bh = ufs_bread(inode, blk, 1, &err);
1270 if (!bh)
1271 goto out;
1272 lock_buffer(bh);
1273 memcpy(bh->b_data+offset, data, tocopy);
1274 flush_dcache_page(bh->b_page);
1275 set_buffer_uptodate(bh);
1276 mark_buffer_dirty(bh);
1277 unlock_buffer(bh);
1278 brelse(bh);
1279 offset = 0;
1280 towrite -= tocopy;
1281 data += tocopy;
1282 blk++;
1283 }
1284out:
15b2fe39 1285 if (len == towrite) {
1b1dcc1b 1286 mutex_unlock(&inode->i_mutex);
1da177e4 1287 return err;
15b2fe39 1288 }
1da177e4
LT		 1289 if (inode->i_size < off+len-towrite)
1290 i_size_write(inode, off+len-towrite);
1291 inode->i_version++;
1292 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1293 mark_inode_dirty(inode);
1b1dcc1b 1294 mutex_unlock(&inode->i_mutex);
1da177e4
LT		 1295 return len - towrite;
1296}
1297
1298#endif
1299
454e2398
DH		 1300static int ufs_get_sb(struct file_system_type *fs_type,
1301 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1da177e4 1302{
454e2398 1303 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1da177e4
LT		 1304}
1305
1306static struct file_system_type ufs_fs_type = {
1307 .owner = THIS_MODULE,
1308 .name = "ufs",
1309 .get_sb = ufs_get_sb,
1310 .kill_sb = kill_block_super,
1311 .fs_flags = FS_REQUIRES_DEV,
1312};
1313
1314static int __init init_ufs_fs(void)
1315{
1316 int err = init_inodecache();
1317 if (err)
1318 goto out1;
1319 err = register_filesystem(&ufs_fs_type);
1320 if (err)
1321 goto out;
1322 return 0;
1323out:
1324 destroy_inodecache();
1325out1:
1326 return err;
1327}
1328
1329static void __exit exit_ufs_fs(void)
1330{
1331 unregister_filesystem(&ufs_fs_type);
1332 destroy_inodecache();
1333}
1334
1335module_init(init_ufs_fs)
1336module_exit(exit_ufs_fs)
1337MODULE_LICENSE("GPL");
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