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Add in SunOS 4.1.x compatible mode for UFS
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ufs / super.c
CommitLineData
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 *
cbcae39f
ED		 64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
1da177e4
LT		 66 */
67
68
1da177e4
LT		 69#include <linux/module.h>
70#include <linux/bitops.h>
71
72#include <stdarg.h>
73
74#include <asm/uaccess.h>
75#include <asm/system.h>
76
77#include <linux/errno.h>
78#include <linux/fs.h>
79#include <linux/ufs_fs.h>
80#include <linux/slab.h>
81#include <linux/time.h>
82#include <linux/stat.h>
83#include <linux/string.h>
84#include <linux/blkdev.h>
85#include <linux/init.h>
86#include <linux/parser.h>
87#include <linux/smp_lock.h>
88#include <linux/buffer_head.h>
89#include <linux/vfs.h>
9e8c4273 90#include <linux/log2.h>
1da177e4
LT		 91
92#include "swab.h"
93#include "util.h"
94
abf5d15f 95#ifdef CONFIG_UFS_DEBUG
1da177e4
LT		 96/*
97 * Print contents of ufs_super_block, useful for debugging
98 */
3313e292 99static void ufs_print_super_stuff(struct super_block *sb,
647b7e87
ED		 100 struct ufs_super_block_first *usb1,
101 struct ufs_super_block_second *usb2,
102 struct ufs_super_block_third *usb3)
1da177e4 103{
3313e292
ED		 104 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
105
1da177e4 106 printk("ufs_print_super_stuff\n");
3313e292
ED		 107 printk(" magic: 0x%x\n", magic);
108 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
647b7e87
ED		 109 printk(" fs_size: %llu\n", (unsigned long long)
110 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
111 printk(" fs_dsize: %llu\n", (unsigned long long)
112 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
113 printk(" bsize: %u\n",
114 fs32_to_cpu(sb, usb1->fs_bsize));
115 printk(" fsize: %u\n",
116 fs32_to_cpu(sb, usb1->fs_fsize));
117 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
118 printk(" fs_sblockloc: %llu\n", (unsigned long long)
119 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
120 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
121 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
122 printk(" cs_nbfree(No of free blocks): %llu\n",
123 (unsigned long long)
124 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
3313e292
ED		 125 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
126 (unsigned long long)
127 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
128 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
129 (unsigned long long)
130 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
647b7e87
ED		 131 } else {
132 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
133 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
134 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
135 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
136 printk(" cgoffset: %u\n",
137 fs32_to_cpu(sb, usb1->fs_cgoffset));
138 printk(" ~cgmask: 0x%x\n",
139 ~fs32_to_cpu(sb, usb1->fs_cgmask));
140 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
141 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
142 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
143 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
144 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
145 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
146 printk(" fragshift: %u\n",
147 fs32_to_cpu(sb, usb1->fs_fragshift));
148 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
149 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
150 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
151 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
152 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
153 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
154 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
155 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
156 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
157 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
158 printk(" fstodb: %u\n",
159 fs32_to_cpu(sb, usb1->fs_fsbtodb));
160 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
161 printk(" ndir %u\n",
162 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
163 printk(" nifree %u\n",
164 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
165 printk(" nbfree %u\n",
166 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
167 printk(" nffree %u\n",
168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
169 }
1da177e4
LT		 170 printk("\n");
171}
172
173/*
174 * Print contents of ufs_cylinder_group, useful for debugging
175 */
647b7e87
ED		 176static void ufs_print_cylinder_stuff(struct super_block *sb,
177 struct ufs_cylinder_group *cg)
1da177e4
LT		 178{
179 printk("\nufs_print_cylinder_stuff\n");
96710b29 180 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
1da177e4
LT		 181 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
182 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
183 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
184 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
185 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
186 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
187 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
188 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
189 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
190 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
191 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
192 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
193 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
194 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
195 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
196 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
197 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
198 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
199 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
200 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
201 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
202 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
203 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
647b7e87
ED		 204 printk(" clustersumoff %u\n",
205 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206 printk(" clusteroff %u\n",
207 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
208 printk(" nclusterblks %u\n",
209 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
1da177e4
LT		 210 printk("\n");
211}
647b7e87 212#else
3313e292 213# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
647b7e87 214# define ufs_print_cylinder_stuff(sb, cg) /**/
abf5d15f 215#endif /* CONFIG_UFS_DEBUG */
1da177e4 216
ee9b6d61 217static const struct super_operations ufs_super_ops;
1da177e4
LT		 218
219static char error_buf[1024];
220
221void ufs_error (struct super_block * sb, const char * function,
222 const char * fmt, ...)
223{
224 struct ufs_sb_private_info * uspi;
225 struct ufs_super_block_first * usb1;
226 va_list args;
227
228 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 229 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 230
231 if (!(sb->s_flags & MS_RDONLY)) {
232 usb1->fs_clean = UFS_FSBAD;
9695ef16 233 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 234 sb->s_dirt = 1;
235 sb->s_flags |= MS_RDONLY;
236 }
237 va_start (args, fmt);
4a6e617a 238 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 239 va_end (args);
240 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
241 case UFS_MOUNT_ONERROR_PANIC:
242 panic ("UFS-fs panic (device %s): %s: %s\n",
243 sb->s_id, function, error_buf);
244
245 case UFS_MOUNT_ONERROR_LOCK:
246 case UFS_MOUNT_ONERROR_UMOUNT:
247 case UFS_MOUNT_ONERROR_REPAIR:
248 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
249 sb->s_id, function, error_buf);
250 }
251}
252
253void ufs_panic (struct super_block * sb, const char * function,
254 const char * fmt, ...)
255{
256 struct ufs_sb_private_info * uspi;
257 struct ufs_super_block_first * usb1;
258 va_list args;
259
260 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 261 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 262
263 if (!(sb->s_flags & MS_RDONLY)) {
264 usb1->fs_clean = UFS_FSBAD;
9695ef16 265 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 266 sb->s_dirt = 1;
267 }
268 va_start (args, fmt);
4a6e617a 269 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 270 va_end (args);
271 sb->s_flags |= MS_RDONLY;
272 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
273 sb->s_id, function, error_buf);
274}
275
276void ufs_warning (struct super_block * sb, const char * function,
277 const char * fmt, ...)
278{
279 va_list args;
280
281 va_start (args, fmt);
4a6e617a 282 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 283 va_end (args);
284 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
285 sb->s_id, function, error_buf);
286}
287
288enum {
252e211e 289 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_sunos, Opt_type_44bsd,
1da177e4
LT		 290 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
291 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
292 Opt_onerror_umount, Opt_onerror_repair, Opt_err
293};
294
295static match_table_t tokens = {
296 {Opt_type_old, "ufstype=old"},
297 {Opt_type_sunx86, "ufstype=sunx86"},
298 {Opt_type_sun, "ufstype=sun"},
252e211e 299 {Opt_type_sunos, "ufstype=sunos"},
1da177e4
LT		 300 {Opt_type_44bsd, "ufstype=44bsd"},
301 {Opt_type_ufs2, "ufstype=ufs2"},
302 {Opt_type_ufs2, "ufstype=5xbsd"},
303 {Opt_type_hp, "ufstype=hp"},
304 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
305 {Opt_type_nextstep, "ufstype=nextstep"},
306 {Opt_type_openstep, "ufstype=openstep"},
307 {Opt_onerror_panic, "onerror=panic"},
308 {Opt_onerror_lock, "onerror=lock"},
309 {Opt_onerror_umount, "onerror=umount"},
310 {Opt_onerror_repair, "onerror=repair"},
311 {Opt_err, NULL}
312};
313
314static int ufs_parse_options (char * options, unsigned * mount_options)
315{
316 char * p;
317
abf5d15f 318 UFSD("ENTER\n");
1da177e4
LT		 319
320 if (!options)
321 return 1;
322
323 while ((p = strsep(&options, ",")) != NULL) {
324 substring_t args[MAX_OPT_ARGS];
325 int token;
326 if (!*p)
327 continue;
328
329 token = match_token(p, tokens, args);
330 switch (token) {
331 case Opt_type_old:
332 ufs_clear_opt (*mount_options, UFSTYPE);
333 ufs_set_opt (*mount_options, UFSTYPE_OLD);
334 break;
335 case Opt_type_sunx86:
336 ufs_clear_opt (*mount_options, UFSTYPE);
337 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
338 break;
339 case Opt_type_sun:
340 ufs_clear_opt (*mount_options, UFSTYPE);
341 ufs_set_opt (*mount_options, UFSTYPE_SUN);
342 break;
252e211e
MF		 343 case Opt_type_sunos:
344 ufs_clear_opt(*mount_options, UFSTYPE);
345 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
346 break;
1da177e4
LT		 347 case Opt_type_44bsd:
348 ufs_clear_opt (*mount_options, UFSTYPE);
349 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
350 break;
351 case Opt_type_ufs2:
352 ufs_clear_opt(*mount_options, UFSTYPE);
353 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
354 break;
355 case Opt_type_hp:
356 ufs_clear_opt (*mount_options, UFSTYPE);
357 ufs_set_opt (*mount_options, UFSTYPE_HP);
358 break;
359 case Opt_type_nextstepcd:
360 ufs_clear_opt (*mount_options, UFSTYPE);
361 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
362 break;
363 case Opt_type_nextstep:
364 ufs_clear_opt (*mount_options, UFSTYPE);
365 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
366 break;
367 case Opt_type_openstep:
368 ufs_clear_opt (*mount_options, UFSTYPE);
369 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
370 break;
371 case Opt_onerror_panic:
372 ufs_clear_opt (*mount_options, ONERROR);
373 ufs_set_opt (*mount_options, ONERROR_PANIC);
374 break;
375 case Opt_onerror_lock:
376 ufs_clear_opt (*mount_options, ONERROR);
377 ufs_set_opt (*mount_options, ONERROR_LOCK);
378 break;
379 case Opt_onerror_umount:
380 ufs_clear_opt (*mount_options, ONERROR);
381 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
382 break;
383 case Opt_onerror_repair:
384 printk("UFS-fs: Unable to do repair on error, "
385 "will lock lock instead\n");
386 ufs_clear_opt (*mount_options, ONERROR);
387 ufs_set_opt (*mount_options, ONERROR_REPAIR);
388 break;
389 default:
390 printk("UFS-fs: Invalid option: \"%s\" "
391 "or missing value\n", p);
392 return 0;
393 }
394 }
395 return 1;
396}
397
398/*
ee3ffd6c
ED		 399 * Diffrent types of UFS hold fs_cstotal in different
400 * places, and use diffrent data structure for it.
401 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
1da177e4 402 */
ee3ffd6c 403static void ufs_setup_cstotal(struct super_block *sb)
e295cfcb 404{
647b7e87
ED		 405 struct ufs_sb_info *sbi = UFS_SB(sb);
406 struct ufs_sb_private_info *uspi = sbi->s_uspi;
ee3ffd6c
ED		 407 struct ufs_super_block_first *usb1;
408 struct ufs_super_block_second *usb2;
647b7e87 409 struct ufs_super_block_third *usb3;
ee3ffd6c
ED		 410 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
411
412 UFSD("ENTER, mtype=%u\n", mtype);
413 usb1 = ubh_get_usb_first(uspi);
414 usb2 = ubh_get_usb_second(uspi);
415 usb3 = ubh_get_usb_third(uspi);
416
417 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
418 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
419 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
420 /*we have statistic in different place, then usual*/
421 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
422 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
423 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
424 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
425 } else {
426 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
427 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
428 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
429 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
430 }
431 UFSD("EXIT\n");
432}
433
434/*
435 * Read on-disk structures associated with cylinder groups
436 */
437static int ufs_read_cylinder_structures(struct super_block *sb)
438{
439 struct ufs_sb_info *sbi = UFS_SB(sb);
440 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 441 struct ufs_buffer_head * ubh;
442 unsigned char * base, * space;
443 unsigned size, blks, i;
ee3ffd6c
ED		 444 struct ufs_super_block_third *usb3;
445
abf5d15f 446 UFSD("ENTER\n");
1da177e4 447
ee3ffd6c 448 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 449 /*
450 * Read cs structures from (usually) first data block
451 * on the device.
452 */
453 size = uspi->s_cssize;
454 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
455 base = space = kmalloc(size, GFP_KERNEL);
456 if (!base)
457 goto failed;
e295cfcb 458 sbi->s_csp = (struct ufs_csum *)space;
1da177e4
LT		 459 for (i = 0; i < blks; i += uspi->s_fpb) {
460 size = uspi->s_bsize;
461 if (i + uspi->s_fpb > blks)
462 size = (blks - i) * uspi->s_fsize;
463
3313e292 464 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
7b4ee73e
E		 465
466 if (!ubh)
467 goto failed;
468
469 ubh_ubhcpymem (space, ubh, size);
7b4ee73e 470
1da177e4
LT		 471 space += size;
472 ubh_brelse (ubh);
473 ubh = NULL;
474 }
475
476 /*
477 * Read cylinder group (we read only first fragment from block
478 * at this time) and prepare internal data structures for cg caching.
479 */
480 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
481 goto failed;
482 for (i = 0; i < uspi->s_ncg; i++)
483 sbi->s_ucg[i] = NULL;
484 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
485 sbi->s_ucpi[i] = NULL;
486 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
487 }
488 for (i = 0; i < uspi->s_ncg; i++) {
abf5d15f 489 UFSD("read cg %u\n", i);
1da177e4
LT		 490 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
491 goto failed;
492 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
493 goto failed;
647b7e87 494
1da177e4 495 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
1da177e4
LT		 496 }
497 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
498 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
499 goto failed;
500 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
501 }
502 sbi->s_cg_loaded = 0;
abf5d15f 503 UFSD("EXIT\n");
1da177e4
LT		 504 return 1;
505
506failed:
f99d49ad 507 kfree (base);
1da177e4
LT		 508 if (sbi->s_ucg) {
509 for (i = 0; i < uspi->s_ncg; i++)
f99d49ad
JJ		 510 if (sbi->s_ucg[i])
511 brelse (sbi->s_ucg[i]);
1da177e4
LT		 512 kfree (sbi->s_ucg);
513 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
f99d49ad 514 kfree (sbi->s_ucpi[i]);
1da177e4 515 }
abf5d15f 516 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 517 return 0;
518}
519
520/*
ee3ffd6c 521 * Sync our internal copy of fs_cstotal with disk
1da177e4 522 */
ee3ffd6c 523static void ufs_put_cstotal(struct super_block *sb)
e295cfcb 524{
ee3ffd6c
ED		 525 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
526 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
527 struct ufs_super_block_first *usb1;
528 struct ufs_super_block_second *usb2;
529 struct ufs_super_block_third *usb3;
530
531 UFSD("ENTER\n");
532 usb1 = ubh_get_usb_first(uspi);
533 usb2 = ubh_get_usb_second(uspi);
534 usb3 = ubh_get_usb_third(uspi);
535
536 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
537 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
538 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
539 /*we have statistic in different place, then usual*/
540 usb2->fs_un.fs_u2.cs_ndir =
541 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
542 usb2->fs_un.fs_u2.cs_nbfree =
543 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
544 usb3->fs_un1.fs_u2.cs_nifree =
545 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
546 usb3->fs_un1.fs_u2.cs_nffree =
547 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
548 } else {
549 usb1->fs_cstotal.cs_ndir =
550 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
551 usb1->fs_cstotal.cs_nbfree =
552 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
553 usb1->fs_cstotal.cs_nifree =
554 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
555 usb1->fs_cstotal.cs_nffree =
556 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
557 }
558 ubh_mark_buffer_dirty(USPI_UBH(uspi));
3313e292 559 ufs_print_super_stuff(sb, usb1, usb2, usb3);
ee3ffd6c
ED		 560 UFSD("EXIT\n");
561}
562
563/**
564 * ufs_put_super_internal() - put on-disk intrenal structures
565 * @sb: pointer to super_block structure
566 * Put on-disk structures associated with cylinder groups
567 * and write them back to disk, also update cs_total on disk
568 */
569static void ufs_put_super_internal(struct super_block *sb)
570{
571 struct ufs_sb_info *sbi = UFS_SB(sb);
572 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 573 struct ufs_buffer_head * ubh;
574 unsigned char * base, * space;
575 unsigned blks, size, i;
ee3ffd6c 576
1da177e4 577
abf5d15f 578 UFSD("ENTER\n");
ee3ffd6c 579 ufs_put_cstotal(sb);
1da177e4
LT		 580 size = uspi->s_cssize;
581 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
e295cfcb 582 base = space = (char*) sbi->s_csp;
1da177e4
LT		 583 for (i = 0; i < blks; i += uspi->s_fpb) {
584 size = uspi->s_bsize;
585 if (i + uspi->s_fpb > blks)
586 size = (blks - i) * uspi->s_fsize;
3313e292 587
1da177e4 588 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
3313e292 589
1da177e4
LT		 590 ubh_memcpyubh (ubh, space, size);
591 space += size;
592 ubh_mark_buffer_uptodate (ubh, 1);
593 ubh_mark_buffer_dirty (ubh);
594 ubh_brelse (ubh);
595 }
596 for (i = 0; i < sbi->s_cg_loaded; i++) {
597 ufs_put_cylinder (sb, i);
598 kfree (sbi->s_ucpi[i]);
599 }
600 for (; i < UFS_MAX_GROUP_LOADED; i++)
601 kfree (sbi->s_ucpi[i]);
602 for (i = 0; i < uspi->s_ncg; i++)
603 brelse (sbi->s_ucg[i]);
604 kfree (sbi->s_ucg);
605 kfree (base);
abf5d15f 606 UFSD("EXIT\n");
1da177e4
LT		 607}
608
609static int ufs_fill_super(struct super_block *sb, void *data, int silent)
610{
611 struct ufs_sb_info * sbi;
612 struct ufs_sb_private_info * uspi;
613 struct ufs_super_block_first * usb1;
614 struct ufs_super_block_second * usb2;
615 struct ufs_super_block_third * usb3;
1da177e4
LT		 616 struct ufs_buffer_head * ubh;
617 struct inode *inode;
618 unsigned block_size, super_block_size;
619 unsigned flags;
7b4ee73e 620 unsigned super_block_offset;
1da177e4
LT		 621
622 uspi = NULL;
623 ubh = NULL;
624 flags = 0;
625
abf5d15f 626 UFSD("ENTER\n");
1da177e4 627
f8314dc6 628 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
1da177e4
LT		 629 if (!sbi)
630 goto failed_nomem;
631 sb->s_fs_info = sbi;
1da177e4 632
abf5d15f 633 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
1da177e4
LT		 634
635#ifndef CONFIG_UFS_FS_WRITE
636 if (!(sb->s_flags & MS_RDONLY)) {
637 printk("ufs was compiled with read-only support, "
638 "can't be mounted as read-write\n");
639 goto failed;
640 }
641#endif
642 /*
643 * Set default mount options
644 * Parse mount options
645 */
646 sbi->s_mount_opt = 0;
647 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
648 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
649 printk("wrong mount options\n");
650 goto failed;
651 }
652 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
653 if (!silent)
654 printk("You didn't specify the type of your ufs filesystem\n\n"
655 "mount -t ufs -o ufstype="
c690a722 656 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
1da177e4
LT		 657 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
658 "default is ufstype=old\n");
659 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
660 }
661
252e211e
MF		 662 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
663 sbi->s_uspi = uspi;
1da177e4
LT		 664 if (!uspi)
665 goto failed;
f336953b 666 uspi->s_dirblksize = UFS_SECTOR_SIZE;
7b4ee73e
E		 667 super_block_offset=UFS_SBLOCK;
668
1da177e4
LT		 669 /* Keep 2Gig file limit. Some UFS variants need to override
670 this but as I don't know which I'll let those in the know loosen
671 the rules */
1da177e4
LT		 672 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
673 case UFS_MOUNT_UFSTYPE_44BSD:
abf5d15f 674 UFSD("ufstype=44bsd\n");
1da177e4
LT		 675 uspi->s_fsize = block_size = 512;
676 uspi->s_fmask = ~(512 - 1);
677 uspi->s_fshift = 9;
678 uspi->s_sbsize = super_block_size = 1536;
679 uspi->s_sbbase = 0;
680 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
681 break;
682 case UFS_MOUNT_UFSTYPE_UFS2:
abf5d15f 683 UFSD("ufstype=ufs2\n");
7b4ee73e 684 super_block_offset=SBLOCK_UFS2;
1da177e4
LT		 685 uspi->s_fsize = block_size = 512;
686 uspi->s_fmask = ~(512 - 1);
687 uspi->s_fshift = 9;
688 uspi->s_sbsize = super_block_size = 1536;
689 uspi->s_sbbase = 0;
690 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
1da177e4
LT		 691 break;
692
693 case UFS_MOUNT_UFSTYPE_SUN:
abf5d15f 694 UFSD("ufstype=sun\n");
1da177e4
LT		 695 uspi->s_fsize = block_size = 1024;
696 uspi->s_fmask = ~(1024 - 1);
697 uspi->s_fshift = 10;
698 uspi->s_sbsize = super_block_size = 2048;
699 uspi->s_sbbase = 0;
252e211e 700 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 701 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
702 break;
703
252e211e
MF		 704 case UFS_MOUNT_UFSTYPE_SUNOS:
705 UFSD(("ufstype=sunos\n"))
706 uspi->s_fsize = block_size = 1024;
707 uspi->s_fmask = ~(1024 - 1);
708 uspi->s_fshift = 10;
709 uspi->s_sbsize = 2048;
710 super_block_size = 2048;
711 uspi->s_sbbase = 0;
712 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
713 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
714 break;
715
1da177e4 716 case UFS_MOUNT_UFSTYPE_SUNx86:
abf5d15f 717 UFSD("ufstype=sunx86\n");
1da177e4
LT		 718 uspi->s_fsize = block_size = 1024;
719 uspi->s_fmask = ~(1024 - 1);
720 uspi->s_fshift = 10;
721 uspi->s_sbsize = super_block_size = 2048;
722 uspi->s_sbbase = 0;
252e211e 723 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 724 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
725 break;
726
727 case UFS_MOUNT_UFSTYPE_OLD:
abf5d15f 728 UFSD("ufstype=old\n");
1da177e4
LT		 729 uspi->s_fsize = block_size = 1024;
730 uspi->s_fmask = ~(1024 - 1);
731 uspi->s_fshift = 10;
732 uspi->s_sbsize = super_block_size = 2048;
733 uspi->s_sbbase = 0;
734 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
735 if (!(sb->s_flags & MS_RDONLY)) {
736 if (!silent)
737 printk(KERN_INFO "ufstype=old is supported read-only\n");
738 sb->s_flags |= MS_RDONLY;
739 }
740 break;
741
742 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
f336953b 743 /*TODO: check may be we need set special dir block size?*/
abf5d15f 744 UFSD("ufstype=nextstep\n");
1da177e4
LT		 745 uspi->s_fsize = block_size = 1024;
746 uspi->s_fmask = ~(1024 - 1);
747 uspi->s_fshift = 10;
748 uspi->s_sbsize = super_block_size = 2048;
749 uspi->s_sbbase = 0;
750 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
751 if (!(sb->s_flags & MS_RDONLY)) {
752 if (!silent)
753 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
754 sb->s_flags |= MS_RDONLY;
755 }
756 break;
757
758 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
f336953b 759 /*TODO: check may be we need set special dir block size?*/
abf5d15f 760 UFSD("ufstype=nextstep-cd\n");
1da177e4
LT		 761 uspi->s_fsize = block_size = 2048;
762 uspi->s_fmask = ~(2048 - 1);
763 uspi->s_fshift = 11;
764 uspi->s_sbsize = super_block_size = 2048;
765 uspi->s_sbbase = 0;
766 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
767 if (!(sb->s_flags & MS_RDONLY)) {
768 if (!silent)
769 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
770 sb->s_flags |= MS_RDONLY;
771 }
772 break;
773
774 case UFS_MOUNT_UFSTYPE_OPENSTEP:
abf5d15f 775 UFSD("ufstype=openstep\n");
1da177e4
LT		 776 uspi->s_fsize = block_size = 1024;
777 uspi->s_fmask = ~(1024 - 1);
778 uspi->s_fshift = 10;
779 uspi->s_sbsize = super_block_size = 2048;
780 uspi->s_sbbase = 0;
f336953b 781 uspi->s_dirblksize = 1024;
1da177e4
LT		 782 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
783 if (!(sb->s_flags & MS_RDONLY)) {
784 if (!silent)
785 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
786 sb->s_flags |= MS_RDONLY;
787 }
788 break;
789
790 case UFS_MOUNT_UFSTYPE_HP:
abf5d15f 791 UFSD("ufstype=hp\n");
1da177e4
LT		 792 uspi->s_fsize = block_size = 1024;
793 uspi->s_fmask = ~(1024 - 1);
794 uspi->s_fshift = 10;
795 uspi->s_sbsize = super_block_size = 2048;
796 uspi->s_sbbase = 0;
797 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
798 if (!(sb->s_flags & MS_RDONLY)) {
799 if (!silent)
800 printk(KERN_INFO "ufstype=hp is supported read-only\n");
801 sb->s_flags |= MS_RDONLY;
802 }
803 break;
804 default:
805 if (!silent)
806 printk("unknown ufstype\n");
807 goto failed;
808 }
809
810again:
811 if (!sb_set_blocksize(sb, block_size)) {
812 printk(KERN_ERR "UFS: failed to set blocksize\n");
813 goto failed;
814 }
815
816 /*
817 * read ufs super block from device
818 */
7b4ee73e
E		 819
820 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
821
1da177e4
LT		 822 if (!ubh)
823 goto failed;
824
7b4ee73e
E		 825 usb1 = ubh_get_usb_first(uspi);
826 usb2 = ubh_get_usb_second(uspi);
827 usb3 = ubh_get_usb_third(uspi);
1da177e4 828
252e211e
MF		 829 /* Sort out mod used on SunOS 4.1.3 for fs_state */
830 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
831 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
832 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
833 flags &= ~UFS_ST_MASK;
834 flags |= UFS_ST_SUN;
835 }
836
1da177e4
LT		 837 /*
838 * Check ufs magic number
839 */
840 sbi->s_bytesex = BYTESEX_LE;
841 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
842 case UFS_MAGIC:
843 case UFS2_MAGIC:
844 case UFS_MAGIC_LFN:
845 case UFS_MAGIC_FEA:
846 case UFS_MAGIC_4GB:
847 goto magic_found;
848 }
849 sbi->s_bytesex = BYTESEX_BE;
850 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
851 case UFS_MAGIC:
852 case UFS2_MAGIC:
853 case UFS_MAGIC_LFN:
854 case UFS_MAGIC_FEA:
855 case UFS_MAGIC_4GB:
856 goto magic_found;
857 }
858
859 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
860 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
861 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
862 && uspi->s_sbbase < 256) {
863 ubh_brelse_uspi(uspi);
864 ubh = NULL;
865 uspi->s_sbbase += 8;
866 goto again;
867 }
868 if (!silent)
869 printk("ufs_read_super: bad magic number\n");
870 goto failed;
871
872magic_found:
873 /*
874 * Check block and fragment sizes
875 */
876 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
877 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
878 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
879 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
880 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
881
9e8c4273 882 if (!is_power_of_2(uspi->s_fsize)) {
1da177e4
LT		 883 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
884 uspi->s_fsize);
885 goto failed;
886 }
887 if (uspi->s_fsize < 512) {
888 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
889 uspi->s_fsize);
890 goto failed;
891 }
892 if (uspi->s_fsize > 4096) {
893 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
894 uspi->s_fsize);
895 goto failed;
896 }
9e8c4273 897 if (!is_power_of_2(uspi->s_bsize)) {
1da177e4
LT		 898 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
899 uspi->s_bsize);
900 goto failed;
901 }
902 if (uspi->s_bsize < 4096) {
903 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
904 uspi->s_bsize);
905 goto failed;
906 }
907 if (uspi->s_bsize / uspi->s_fsize > 8) {
908 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
909 uspi->s_bsize / uspi->s_fsize);
910 goto failed;
911 }
912 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
913 ubh_brelse_uspi(uspi);
914 ubh = NULL;
915 block_size = uspi->s_fsize;
916 super_block_size = uspi->s_sbsize;
abf5d15f 917 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1da177e4
LT		 918 goto again;
919 }
920
f9b7cba1 921 sbi->s_flags = flags;/*after that line some functions use s_flags*/
3313e292 922 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1da177e4
LT		 923
924 /*
925 * Check, if file system was correctly unmounted.
926 * If not, make it read only.
927 */
928 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
929 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
930 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
252e211e 931 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1da177e4
LT		 932 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
933 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
934 switch(usb1->fs_clean) {
935 case UFS_FSCLEAN:
abf5d15f 936 UFSD("fs is clean\n");
1da177e4
LT		 937 break;
938 case UFS_FSSTABLE:
abf5d15f 939 UFSD("fs is stable\n");
1da177e4
LT		 940 break;
941 case UFS_FSOSF1:
abf5d15f 942 UFSD("fs is DEC OSF/1\n");
1da177e4
LT		 943 break;
944 case UFS_FSACTIVE:
945 printk("ufs_read_super: fs is active\n");
946 sb->s_flags |= MS_RDONLY;
947 break;
948 case UFS_FSBAD:
949 printk("ufs_read_super: fs is bad\n");
950 sb->s_flags |= MS_RDONLY;
951 break;
952 default:
953 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
954 sb->s_flags |= MS_RDONLY;
955 break;
956 }
ee3ffd6c 957 } else {
1da177e4
LT		 958 printk("ufs_read_super: fs needs fsck\n");
959 sb->s_flags |= MS_RDONLY;
960 }
961
962 /*
963 * Read ufs_super_block into internal data structures
964 */
965 sb->s_op = &ufs_super_ops;
966 sb->dq_op = NULL; /***/
967 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
968
969 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
970 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
971 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
972 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
973 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
974 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
975
976 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
647b7e87
ED		 977 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
978 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
979 } else {
1da177e4
LT		 980 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
981 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
982 }
983
984 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
985 /* s_bsize already set */
986 /* s_fsize already set */
987 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
988 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
989 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
990 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
991 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
992 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
abf5d15f
ED		 993 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
994 uspi->s_fshift);
1da177e4
LT		 995 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
996 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
997 /* s_sbsize already set */
998 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
999 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1000 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1001 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1002 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1003 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1004 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1005 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
3313e292
ED		 1006
1007 if (uspi->fs_magic == UFS2_MAGIC)
1008 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1009 else
1010 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1011
1da177e4
LT		 1012 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1013 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1014 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1015 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1016 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1017 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1018 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
647b7e87
ED		 1019 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1020 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1da177e4
LT		 1021 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1022 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1da177e4
LT		 1023 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1024 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1025 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1026
1027 /*
1028 * Compute another frequently used values
1029 */
1030 uspi->s_fpbmask = uspi->s_fpb - 1;
abf5d15f 1031 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 1032 uspi->s_apbshift = uspi->s_bshift - 3;
abf5d15f 1033 else
1da177e4 1034 uspi->s_apbshift = uspi->s_bshift - 2;
abf5d15f 1035
1da177e4
LT		 1036 uspi->s_2apbshift = uspi->s_apbshift * 2;
1037 uspi->s_3apbshift = uspi->s_apbshift * 3;
1038 uspi->s_apb = 1 << uspi->s_apbshift;
1039 uspi->s_2apb = 1 << uspi->s_2apbshift;
1040 uspi->s_3apb = 1 << uspi->s_3apbshift;
1041 uspi->s_apbmask = uspi->s_apb - 1;
1042 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1043 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1044 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1045 uspi->s_bpf = uspi->s_fsize << 3;
1046 uspi->s_bpfshift = uspi->s_fshift + 3;
1047 uspi->s_bpfmask = uspi->s_bpf - 1;
1048 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1049 UFS_MOUNT_UFSTYPE_44BSD)
1050 uspi->s_maxsymlinklen =
647b7e87 1051 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1da177e4
LT		 1052
1053 inode = iget(sb, UFS_ROOTINO);
1054 if (!inode || is_bad_inode(inode))
1055 goto failed;
1056 sb->s_root = d_alloc_root(inode);
1057 if (!sb->s_root)
1058 goto dalloc_failed;
1059
ee3ffd6c 1060 ufs_setup_cstotal(sb);
1da177e4
LT		 1061 /*
1062 * Read cylinder group structures
1063 */
1064 if (!(sb->s_flags & MS_RDONLY))
1065 if (!ufs_read_cylinder_structures(sb))
1066 goto failed;
1067
abf5d15f 1068 UFSD("EXIT\n");
1da177e4
LT		 1069 return 0;
1070
1071dalloc_failed:
1072 iput(inode);
1073failed:
f99d49ad
JJ		 1074 if (ubh)
1075 ubh_brelse_uspi (uspi);
1076 kfree (uspi);
1077 kfree(sbi);
1da177e4 1078 sb->s_fs_info = NULL;
abf5d15f 1079 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 1080 return -EINVAL;
1081
1082failed_nomem:
abf5d15f 1083 UFSD("EXIT (NOMEM)\n");
1da177e4
LT		 1084 return -ENOMEM;
1085}
1086
647b7e87
ED		 1087static void ufs_write_super(struct super_block *sb)
1088{
1da177e4
LT		 1089 struct ufs_sb_private_info * uspi;
1090 struct ufs_super_block_first * usb1;
1091 struct ufs_super_block_third * usb3;
1092 unsigned flags;
1093
1094 lock_kernel();
abf5d15f 1095 UFSD("ENTER\n");
1da177e4
LT		 1096 flags = UFS_SB(sb)->s_flags;
1097 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e
E		 1098 usb1 = ubh_get_usb_first(uspi);
1099 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1100
1101 if (!(sb->s_flags & MS_RDONLY)) {
1102 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1103 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1104 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1105 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1106 ufs_set_fs_state(sb, usb1, usb3,
1107 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
ee3ffd6c 1108 ufs_put_cstotal(sb);
1da177e4
LT		 1109 }
1110 sb->s_dirt = 0;
abf5d15f 1111 UFSD("EXIT\n");
1da177e4
LT		 1112 unlock_kernel();
1113}
1114
abf5d15f 1115static void ufs_put_super(struct super_block *sb)
1da177e4
LT		 1116{
1117 struct ufs_sb_info * sbi = UFS_SB(sb);
1118
abf5d15f 1119 UFSD("ENTER\n");
1da177e4
LT		 1120
1121 if (!(sb->s_flags & MS_RDONLY))
ee3ffd6c 1122 ufs_put_super_internal(sb);
1da177e4
LT		 1123
1124 ubh_brelse_uspi (sbi->s_uspi);
1125 kfree (sbi->s_uspi);
1126 kfree (sbi);
1127 sb->s_fs_info = NULL;
647b7e87 1128 UFSD("EXIT\n");
1da177e4
LT		 1129 return;
1130}
1131
1132
1133static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1134{
1135 struct ufs_sb_private_info * uspi;
1136 struct ufs_super_block_first * usb1;
1137 struct ufs_super_block_third * usb3;
1138 unsigned new_mount_opt, ufstype;
1139 unsigned flags;
1140
1141 uspi = UFS_SB(sb)->s_uspi;
1142 flags = UFS_SB(sb)->s_flags;
7b4ee73e
E		 1143 usb1 = ubh_get_usb_first(uspi);
1144 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1145
1146 /*
1147 * Allow the "check" option to be passed as a remount option.
1148 * It is not possible to change ufstype option during remount
1149 */
1150 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1151 new_mount_opt = 0;
1152 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1153 if (!ufs_parse_options (data, &new_mount_opt))
1154 return -EINVAL;
1155 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1156 new_mount_opt |= ufstype;
ee3ffd6c 1157 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1da177e4
LT		 1158 printk("ufstype can't be changed during remount\n");
1159 return -EINVAL;
1160 }
1161
1162 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1163 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1164 return 0;
1165 }
1166
1167 /*
1168 * fs was mouted as rw, remounting ro
1169 */
1170 if (*mount_flags & MS_RDONLY) {
ee3ffd6c 1171 ufs_put_super_internal(sb);
1da177e4
LT		 1172 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1173 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1174 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1175 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1176 ufs_set_fs_state(sb, usb1, usb3,
1177 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1178 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1da177e4
LT		 1179 sb->s_dirt = 0;
1180 sb->s_flags |= MS_RDONLY;
ee3ffd6c 1181 } else {
1da177e4
LT		 1182 /*
1183 * fs was mounted as ro, remounting rw
1184 */
1da177e4
LT		 1185#ifndef CONFIG_UFS_FS_WRITE
1186 printk("ufs was compiled with read-only support, "
1187 "can't be mounted as read-write\n");
1188 return -EINVAL;
1189#else
1190 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
252e211e 1191 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1da177e4 1192 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
cbcae39f
ED		 1193 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1194 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1da177e4
LT		 1195 printk("this ufstype is read-only supported\n");
1196 return -EINVAL;
1197 }
ee3ffd6c 1198 if (!ufs_read_cylinder_structures(sb)) {
1da177e4
LT		 1199 printk("failed during remounting\n");
1200 return -EPERM;
1201 }
1202 sb->s_flags &= ~MS_RDONLY;
1203#endif
1204 }
1205 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1206 return 0;
1207}
1208
647b7e87 1209static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1210{
726c3342 1211 struct super_block *sb = dentry->d_sb;
647b7e87
ED		 1212 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1213 unsigned flags = UFS_SB(sb)->s_flags;
1214 struct ufs_super_block_first *usb1;
1215 struct ufs_super_block_second *usb2;
1216 struct ufs_super_block_third *usb3;
1da177e4
LT		 1217
1218 lock_kernel();
1219
647b7e87
ED		 1220 usb1 = ubh_get_usb_first(uspi);
1221 usb2 = ubh_get_usb_second(uspi);
1222 usb3 = ubh_get_usb_third(uspi);
1da177e4 1223
1da177e4
LT		 1224 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1225 buf->f_type = UFS2_MAGIC;
647b7e87 1226 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
647b7e87 1227 } else {
1da177e4
LT		 1228 buf->f_type = UFS_MAGIC;
1229 buf->f_blocks = uspi->s_dsize;
1da177e4 1230 }
ee3ffd6c
ED		 1231 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1232 uspi->cs_total.cs_nffree;
1233 buf->f_ffree = uspi->cs_total.cs_nifree;
1da177e4
LT		 1234 buf->f_bsize = sb->s_blocksize;
1235 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1236 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1237 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1238 buf->f_namelen = UFS_MAXNAMLEN;
1239
1240 unlock_kernel();
1241
1242 return 0;
1243}
1244
e18b890b 1245static struct kmem_cache * ufs_inode_cachep;
1da177e4
LT		 1246
1247static struct inode *ufs_alloc_inode(struct super_block *sb)
1248{
1249 struct ufs_inode_info *ei;
e94b1766 1250 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 1251 if (!ei)
1252 return NULL;
1253 ei->vfs_inode.i_version = 1;
1254 return &ei->vfs_inode;
1255}
1256
1257static void ufs_destroy_inode(struct inode *inode)
1258{
1259 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1260}
1261
4ba9b9d0 1262static void init_once(struct kmem_cache * cachep, void *foo)
1da177e4
LT		 1263{
1264 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1265
a35afb83 1266 inode_init_once(&ei->vfs_inode);
1da177e4 1267}
20c2df83 1268
1da177e4
LT		 1269static int init_inodecache(void)
1270{
1271 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1272 sizeof(struct ufs_inode_info),
fffb60f9
PJ		 1273 0, (SLAB_RECLAIM_ACCOUNT|
1274 SLAB_MEM_SPREAD),
20c2df83 1275 init_once);
1da177e4
LT		 1276 if (ufs_inode_cachep == NULL)
1277 return -ENOMEM;
1278 return 0;
1279}
1280
1281static void destroy_inodecache(void)
1282{
1a1d92c1 1283 kmem_cache_destroy(ufs_inode_cachep);
1da177e4
LT		 1284}
1285
1286#ifdef CONFIG_QUOTA
1287static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1288static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1289#endif
1290
ee9b6d61 1291static const struct super_operations ufs_super_ops = {
1da177e4
LT		 1292 .alloc_inode = ufs_alloc_inode,
1293 .destroy_inode = ufs_destroy_inode,
1294 .read_inode = ufs_read_inode,
1295 .write_inode = ufs_write_inode,
1296 .delete_inode = ufs_delete_inode,
1297 .put_super = ufs_put_super,
1298 .write_super = ufs_write_super,
1299 .statfs = ufs_statfs,
1300 .remount_fs = ufs_remount,
1301#ifdef CONFIG_QUOTA
1302 .quota_read = ufs_quota_read,
1303 .quota_write = ufs_quota_write,
1304#endif
1305};
1306
1307#ifdef CONFIG_QUOTA
1308
1309/* Read data from quotafile - avoid pagecache and such because we cannot afford
1310 * acquiring the locks... As quota files are never truncated and quota code
1311 * itself serializes the operations (and noone else should touch the files)
1312 * we don't have to be afraid of races */
1313static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1314 size_t len, loff_t off)
1315{
1316 struct inode *inode = sb_dqopt(sb)->files[type];
1317 sector_t blk = off >> sb->s_blocksize_bits;
1318 int err = 0;
1319 int offset = off & (sb->s_blocksize - 1);
1320 int tocopy;
1321 size_t toread;
1322 struct buffer_head *bh;
1323 loff_t i_size = i_size_read(inode);
1324
1325 if (off > i_size)
1326 return 0;
1327 if (off+len > i_size)
1328 len = i_size-off;
1329 toread = len;
1330 while (toread > 0) {
1331 tocopy = sb->s_blocksize - offset < toread ?
1332 sb->s_blocksize - offset : toread;
1333
1334 bh = ufs_bread(inode, blk, 0, &err);
1335 if (err)
1336 return err;
1337 if (!bh) /* A hole? */
1338 memset(data, 0, tocopy);
1339 else {
1340 memcpy(data, bh->b_data+offset, tocopy);
1341 brelse(bh);
1342 }
1343 offset = 0;
1344 toread -= tocopy;
1345 data += tocopy;
1346 blk++;
1347 }
1348 return len;
1349}
1350
1351/* Write to quotafile */
1352static ssize_t ufs_quota_write(struct super_block *sb, int type,
1353 const char *data, size_t len, loff_t off)
1354{
1355 struct inode *inode = sb_dqopt(sb)->files[type];
1356 sector_t blk = off >> sb->s_blocksize_bits;
1357 int err = 0;
1358 int offset = off & (sb->s_blocksize - 1);
1359 int tocopy;
1360 size_t towrite = len;
1361 struct buffer_head *bh;
1362
5c81a419 1363 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1da177e4
LT		 1364 while (towrite > 0) {
1365 tocopy = sb->s_blocksize - offset < towrite ?
1366 sb->s_blocksize - offset : towrite;
1367
1368 bh = ufs_bread(inode, blk, 1, &err);
1369 if (!bh)
1370 goto out;
1371 lock_buffer(bh);
1372 memcpy(bh->b_data+offset, data, tocopy);
1373 flush_dcache_page(bh->b_page);
1374 set_buffer_uptodate(bh);
1375 mark_buffer_dirty(bh);
1376 unlock_buffer(bh);
1377 brelse(bh);
1378 offset = 0;
1379 towrite -= tocopy;
1380 data += tocopy;
1381 blk++;
1382 }
1383out:
15b2fe39 1384 if (len == towrite) {
1b1dcc1b 1385 mutex_unlock(&inode->i_mutex);
1da177e4 1386 return err;
15b2fe39 1387 }
1da177e4
LT		 1388 if (inode->i_size < off+len-towrite)
1389 i_size_write(inode, off+len-towrite);
1390 inode->i_version++;
1391 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1392 mark_inode_dirty(inode);
1b1dcc1b 1393 mutex_unlock(&inode->i_mutex);
1da177e4
LT		 1394 return len - towrite;
1395}
1396
1397#endif
1398
454e2398
DH		 1399static int ufs_get_sb(struct file_system_type *fs_type,
1400 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1da177e4 1401{
454e2398 1402 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1da177e4
LT		 1403}
1404
1405static struct file_system_type ufs_fs_type = {
1406 .owner = THIS_MODULE,
1407 .name = "ufs",
1408 .get_sb = ufs_get_sb,
1409 .kill_sb = kill_block_super,
1410 .fs_flags = FS_REQUIRES_DEV,
1411};
1412
1413static int __init init_ufs_fs(void)
1414{
1415 int err = init_inodecache();
1416 if (err)
1417 goto out1;
1418 err = register_filesystem(&ufs_fs_type);
1419 if (err)
1420 goto out;
1421 return 0;
1422out:
1423 destroy_inodecache();
1424out1:
1425 return err;
1426}
1427
1428static void __exit exit_ufs_fs(void)
1429{
1430 unregister_filesystem(&ufs_fs_type);
1431 destroy_inodecache();
1432}
1433
1434module_init(init_ufs_fs)
1435module_exit(exit_ufs_fs)
1436MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)