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sysv: add ->sync_fs
[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
f762dd68 44 * Gertjan van Wingerde <gwingerde@gmail.com>
1da177e4
LT		 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>
74abb989 79#include <linux/quotaops.h>
1da177e4
LT		 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>
2a9807c0
ED		 91#include <linux/mount.h>
92#include <linux/seq_file.h>
1da177e4 93
e5420598 94#include "ufs_fs.h"
bcd6d4ec 95#include "ufs.h"
1da177e4
LT		 96#include "swab.h"
97#include "util.h"
98
abf5d15f 99#ifdef CONFIG_UFS_DEBUG
1da177e4
LT		 100/*
101 * Print contents of ufs_super_block, useful for debugging
102 */
3313e292 103static void ufs_print_super_stuff(struct super_block *sb,
647b7e87
ED		 104 struct ufs_super_block_first *usb1,
105 struct ufs_super_block_second *usb2,
106 struct ufs_super_block_third *usb3)
1da177e4 107{
3313e292
ED		 108 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
109
1da177e4 110 printk("ufs_print_super_stuff\n");
3313e292
ED		 111 printk(" magic: 0x%x\n", magic);
112 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
647b7e87
ED		 113 printk(" fs_size: %llu\n", (unsigned long long)
114 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
115 printk(" fs_dsize: %llu\n", (unsigned long long)
116 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
117 printk(" bsize: %u\n",
118 fs32_to_cpu(sb, usb1->fs_bsize));
119 printk(" fsize: %u\n",
120 fs32_to_cpu(sb, usb1->fs_fsize));
121 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
122 printk(" fs_sblockloc: %llu\n", (unsigned long long)
123 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
124 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
125 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
126 printk(" cs_nbfree(No of free blocks): %llu\n",
127 (unsigned long long)
128 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
3313e292
ED		 129 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
130 (unsigned long long)
131 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
132 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
133 (unsigned long long)
134 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
90b315af
ED		 135 printk(KERN_INFO" fs_maxsymlinklen: %u\n",
136 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
647b7e87
ED		 137 } else {
138 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
139 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
140 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
141 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
142 printk(" cgoffset: %u\n",
143 fs32_to_cpu(sb, usb1->fs_cgoffset));
144 printk(" ~cgmask: 0x%x\n",
145 ~fs32_to_cpu(sb, usb1->fs_cgmask));
146 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
147 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
148 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
149 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
150 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
151 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
152 printk(" fragshift: %u\n",
153 fs32_to_cpu(sb, usb1->fs_fragshift));
154 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
155 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
156 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
157 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
158 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
159 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
160 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
161 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
162 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
163 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
164 printk(" fstodb: %u\n",
165 fs32_to_cpu(sb, usb1->fs_fsbtodb));
166 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
167 printk(" ndir %u\n",
168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
169 printk(" nifree %u\n",
170 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
171 printk(" nbfree %u\n",
172 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
173 printk(" nffree %u\n",
174 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
175 }
1da177e4
LT		 176 printk("\n");
177}
178
179/*
180 * Print contents of ufs_cylinder_group, useful for debugging
181 */
647b7e87
ED		 182static void ufs_print_cylinder_stuff(struct super_block *sb,
183 struct ufs_cylinder_group *cg)
1da177e4
LT		 184{
185 printk("\nufs_print_cylinder_stuff\n");
96710b29 186 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
1da177e4
LT		 187 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
188 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
189 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
190 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
191 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
192 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
193 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
194 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
195 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
196 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
197 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
198 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
199 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
200 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
201 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
202 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
203 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
204 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
205 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
206 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
207 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
208 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
209 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
647b7e87
ED		 210 printk(" clustersumoff %u\n",
211 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
212 printk(" clusteroff %u\n",
213 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
214 printk(" nclusterblks %u\n",
215 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
1da177e4
LT		 216 printk("\n");
217}
647b7e87 218#else
3313e292 219# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
647b7e87 220# define ufs_print_cylinder_stuff(sb, cg) /**/
abf5d15f 221#endif /* CONFIG_UFS_DEBUG */
1da177e4 222
ee9b6d61 223static const struct super_operations ufs_super_ops;
1da177e4
LT		 224
225static char error_buf[1024];
226
227void ufs_error (struct super_block * sb, const char * function,
228 const char * fmt, ...)
229{
230 struct ufs_sb_private_info * uspi;
231 struct ufs_super_block_first * usb1;
232 va_list args;
233
234 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 235 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 236
237 if (!(sb->s_flags & MS_RDONLY)) {
238 usb1->fs_clean = UFS_FSBAD;
9695ef16 239 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 240 sb->s_dirt = 1;
241 sb->s_flags |= MS_RDONLY;
242 }
243 va_start (args, fmt);
4a6e617a 244 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 245 va_end (args);
246 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
247 case UFS_MOUNT_ONERROR_PANIC:
248 panic ("UFS-fs panic (device %s): %s: %s\n",
249 sb->s_id, function, error_buf);
250
251 case UFS_MOUNT_ONERROR_LOCK:
252 case UFS_MOUNT_ONERROR_UMOUNT:
253 case UFS_MOUNT_ONERROR_REPAIR:
254 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
255 sb->s_id, function, error_buf);
256 }
257}
258
259void ufs_panic (struct super_block * sb, const char * function,
260 const char * fmt, ...)
261{
262 struct ufs_sb_private_info * uspi;
263 struct ufs_super_block_first * usb1;
264 va_list args;
265
337eb00a 266 lock_kernel();
1da177e4 267 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 268 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 269
270 if (!(sb->s_flags & MS_RDONLY)) {
271 usb1->fs_clean = UFS_FSBAD;
9695ef16 272 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 273 sb->s_dirt = 1;
274 }
275 va_start (args, fmt);
4a6e617a 276 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 277 va_end (args);
278 sb->s_flags |= MS_RDONLY;
279 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
280 sb->s_id, function, error_buf);
281}
282
283void ufs_warning (struct super_block * sb, const char * function,
284 const char * fmt, ...)
285{
286 va_list args;
287
288 va_start (args, fmt);
4a6e617a 289 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 290 va_end (args);
291 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
292 sb->s_id, function, error_buf);
293}
294
295enum {
2a9807c0
ED		 296 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
297 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
298 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
299 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
300 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
301 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
302 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
303 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
304 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
305 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
306 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
307 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
308 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
309 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
310 Opt_err
1da177e4
LT		 311};
312
a447c093 313static const match_table_t tokens = {
1da177e4
LT		 314 {Opt_type_old, "ufstype=old"},
315 {Opt_type_sunx86, "ufstype=sunx86"},
316 {Opt_type_sun, "ufstype=sun"},
252e211e 317 {Opt_type_sunos, "ufstype=sunos"},
1da177e4
LT		 318 {Opt_type_44bsd, "ufstype=44bsd"},
319 {Opt_type_ufs2, "ufstype=ufs2"},
320 {Opt_type_ufs2, "ufstype=5xbsd"},
321 {Opt_type_hp, "ufstype=hp"},
322 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
323 {Opt_type_nextstep, "ufstype=nextstep"},
324 {Opt_type_openstep, "ufstype=openstep"},
2a9807c0 325/*end of possible ufs types */
1da177e4
LT		 326 {Opt_onerror_panic, "onerror=panic"},
327 {Opt_onerror_lock, "onerror=lock"},
328 {Opt_onerror_umount, "onerror=umount"},
329 {Opt_onerror_repair, "onerror=repair"},
330 {Opt_err, NULL}
331};
332
333static int ufs_parse_options (char * options, unsigned * mount_options)
334{
335 char * p;
336
abf5d15f 337 UFSD("ENTER\n");
1da177e4
LT		 338
339 if (!options)
340 return 1;
341
342 while ((p = strsep(&options, ",")) != NULL) {
343 substring_t args[MAX_OPT_ARGS];
344 int token;
345 if (!*p)
346 continue;
347
348 token = match_token(p, tokens, args);
349 switch (token) {
350 case Opt_type_old:
351 ufs_clear_opt (*mount_options, UFSTYPE);
352 ufs_set_opt (*mount_options, UFSTYPE_OLD);
353 break;
354 case Opt_type_sunx86:
355 ufs_clear_opt (*mount_options, UFSTYPE);
356 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
357 break;
358 case Opt_type_sun:
359 ufs_clear_opt (*mount_options, UFSTYPE);
360 ufs_set_opt (*mount_options, UFSTYPE_SUN);
361 break;
252e211e
MF		 362 case Opt_type_sunos:
363 ufs_clear_opt(*mount_options, UFSTYPE);
364 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
365 break;
1da177e4
LT		 366 case Opt_type_44bsd:
367 ufs_clear_opt (*mount_options, UFSTYPE);
368 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
369 break;
370 case Opt_type_ufs2:
371 ufs_clear_opt(*mount_options, UFSTYPE);
372 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
373 break;
374 case Opt_type_hp:
375 ufs_clear_opt (*mount_options, UFSTYPE);
376 ufs_set_opt (*mount_options, UFSTYPE_HP);
377 break;
378 case Opt_type_nextstepcd:
379 ufs_clear_opt (*mount_options, UFSTYPE);
380 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
381 break;
382 case Opt_type_nextstep:
383 ufs_clear_opt (*mount_options, UFSTYPE);
384 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
385 break;
386 case Opt_type_openstep:
387 ufs_clear_opt (*mount_options, UFSTYPE);
388 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
389 break;
390 case Opt_onerror_panic:
391 ufs_clear_opt (*mount_options, ONERROR);
392 ufs_set_opt (*mount_options, ONERROR_PANIC);
393 break;
394 case Opt_onerror_lock:
395 ufs_clear_opt (*mount_options, ONERROR);
396 ufs_set_opt (*mount_options, ONERROR_LOCK);
397 break;
398 case Opt_onerror_umount:
399 ufs_clear_opt (*mount_options, ONERROR);
400 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
401 break;
402 case Opt_onerror_repair:
403 printk("UFS-fs: Unable to do repair on error, "
404 "will lock lock instead\n");
405 ufs_clear_opt (*mount_options, ONERROR);
406 ufs_set_opt (*mount_options, ONERROR_REPAIR);
407 break;
408 default:
409 printk("UFS-fs: Invalid option: \"%s\" "
410 "or missing value\n", p);
411 return 0;
412 }
413 }
414 return 1;
415}
416
417/*
ee3ffd6c
ED		 418 * Diffrent types of UFS hold fs_cstotal in different
419 * places, and use diffrent data structure for it.
420 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
1da177e4 421 */
ee3ffd6c 422static void ufs_setup_cstotal(struct super_block *sb)
e295cfcb 423{
647b7e87
ED		 424 struct ufs_sb_info *sbi = UFS_SB(sb);
425 struct ufs_sb_private_info *uspi = sbi->s_uspi;
ee3ffd6c
ED		 426 struct ufs_super_block_first *usb1;
427 struct ufs_super_block_second *usb2;
647b7e87 428 struct ufs_super_block_third *usb3;
ee3ffd6c
ED		 429 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
430
431 UFSD("ENTER, mtype=%u\n", mtype);
432 usb1 = ubh_get_usb_first(uspi);
433 usb2 = ubh_get_usb_second(uspi);
434 usb3 = ubh_get_usb_third(uspi);
435
436 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
437 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
438 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
439 /*we have statistic in different place, then usual*/
440 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
441 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
442 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
443 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
444 } else {
445 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
446 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
447 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
448 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
449 }
450 UFSD("EXIT\n");
451}
452
453/*
454 * Read on-disk structures associated with cylinder groups
455 */
456static int ufs_read_cylinder_structures(struct super_block *sb)
457{
458 struct ufs_sb_info *sbi = UFS_SB(sb);
459 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 460 struct ufs_buffer_head * ubh;
461 unsigned char * base, * space;
462 unsigned size, blks, i;
ee3ffd6c
ED		 463 struct ufs_super_block_third *usb3;
464
abf5d15f 465 UFSD("ENTER\n");
1da177e4 466
ee3ffd6c 467 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 468 /*
469 * Read cs structures from (usually) first data block
470 * on the device.
471 */
472 size = uspi->s_cssize;
473 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
474 base = space = kmalloc(size, GFP_KERNEL);
475 if (!base)
476 goto failed;
e295cfcb 477 sbi->s_csp = (struct ufs_csum *)space;
1da177e4
LT		 478 for (i = 0; i < blks; i += uspi->s_fpb) {
479 size = uspi->s_bsize;
480 if (i + uspi->s_fpb > blks)
481 size = (blks - i) * uspi->s_fsize;
482
3313e292 483 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
7b4ee73e
E		 484
485 if (!ubh)
486 goto failed;
487
488 ubh_ubhcpymem (space, ubh, size);
7b4ee73e 489
1da177e4
LT		 490 space += size;
491 ubh_brelse (ubh);
492 ubh = NULL;
493 }
494
495 /*
496 * Read cylinder group (we read only first fragment from block
497 * at this time) and prepare internal data structures for cg caching.
498 */
499 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
500 goto failed;
501 for (i = 0; i < uspi->s_ncg; i++)
502 sbi->s_ucg[i] = NULL;
503 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
504 sbi->s_ucpi[i] = NULL;
505 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
506 }
507 for (i = 0; i < uspi->s_ncg; i++) {
abf5d15f 508 UFSD("read cg %u\n", i);
1da177e4
LT		 509 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
510 goto failed;
511 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
512 goto failed;
647b7e87 513
1da177e4 514 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
1da177e4
LT		 515 }
516 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
517 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
518 goto failed;
519 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
520 }
521 sbi->s_cg_loaded = 0;
abf5d15f 522 UFSD("EXIT\n");
1da177e4
LT		 523 return 1;
524
525failed:
f99d49ad 526 kfree (base);
1da177e4
LT		 527 if (sbi->s_ucg) {
528 for (i = 0; i < uspi->s_ncg; i++)
f99d49ad
JJ		 529 if (sbi->s_ucg[i])
530 brelse (sbi->s_ucg[i]);
1da177e4
LT		 531 kfree (sbi->s_ucg);
532 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
f99d49ad 533 kfree (sbi->s_ucpi[i]);
1da177e4 534 }
abf5d15f 535 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 536 return 0;
537}
538
539/*
ee3ffd6c 540 * Sync our internal copy of fs_cstotal with disk
1da177e4 541 */
ee3ffd6c 542static void ufs_put_cstotal(struct super_block *sb)
e295cfcb 543{
ee3ffd6c
ED		 544 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
545 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
546 struct ufs_super_block_first *usb1;
547 struct ufs_super_block_second *usb2;
548 struct ufs_super_block_third *usb3;
549
550 UFSD("ENTER\n");
551 usb1 = ubh_get_usb_first(uspi);
552 usb2 = ubh_get_usb_second(uspi);
553 usb3 = ubh_get_usb_third(uspi);
554
555 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
556 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
557 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
558 /*we have statistic in different place, then usual*/
559 usb2->fs_un.fs_u2.cs_ndir =
560 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
561 usb2->fs_un.fs_u2.cs_nbfree =
562 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
563 usb3->fs_un1.fs_u2.cs_nifree =
564 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
565 usb3->fs_un1.fs_u2.cs_nffree =
566 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
567 } else {
568 usb1->fs_cstotal.cs_ndir =
569 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
570 usb1->fs_cstotal.cs_nbfree =
571 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
572 usb1->fs_cstotal.cs_nifree =
573 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
574 usb1->fs_cstotal.cs_nffree =
575 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
576 }
577 ubh_mark_buffer_dirty(USPI_UBH(uspi));
3313e292 578 ufs_print_super_stuff(sb, usb1, usb2, usb3);
ee3ffd6c
ED		 579 UFSD("EXIT\n");
580}
581
582/**
583 * ufs_put_super_internal() - put on-disk intrenal structures
584 * @sb: pointer to super_block structure
585 * Put on-disk structures associated with cylinder groups
586 * and write them back to disk, also update cs_total on disk
587 */
588static void ufs_put_super_internal(struct super_block *sb)
589{
590 struct ufs_sb_info *sbi = UFS_SB(sb);
591 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 592 struct ufs_buffer_head * ubh;
593 unsigned char * base, * space;
594 unsigned blks, size, i;
ee3ffd6c 595
1da177e4 596
abf5d15f 597 UFSD("ENTER\n");
6cfd0148
CH		 598
599 lock_kernel();
600
ee3ffd6c 601 ufs_put_cstotal(sb);
1da177e4
LT		 602 size = uspi->s_cssize;
603 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
e295cfcb 604 base = space = (char*) sbi->s_csp;
1da177e4
LT		 605 for (i = 0; i < blks; i += uspi->s_fpb) {
606 size = uspi->s_bsize;
607 if (i + uspi->s_fpb > blks)
608 size = (blks - i) * uspi->s_fsize;
3313e292 609
1da177e4 610 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
3313e292 611
1da177e4
LT		 612 ubh_memcpyubh (ubh, space, size);
613 space += size;
614 ubh_mark_buffer_uptodate (ubh, 1);
615 ubh_mark_buffer_dirty (ubh);
616 ubh_brelse (ubh);
617 }
618 for (i = 0; i < sbi->s_cg_loaded; i++) {
619 ufs_put_cylinder (sb, i);
620 kfree (sbi->s_ucpi[i]);
621 }
622 for (; i < UFS_MAX_GROUP_LOADED; i++)
623 kfree (sbi->s_ucpi[i]);
624 for (i = 0; i < uspi->s_ncg; i++)
625 brelse (sbi->s_ucg[i]);
626 kfree (sbi->s_ucg);
627 kfree (base);
6cfd0148
CH		 628
629 unlock_kernel();
630
abf5d15f 631 UFSD("EXIT\n");
1da177e4
LT		 632}
633
634static int ufs_fill_super(struct super_block *sb, void *data, int silent)
635{
636 struct ufs_sb_info * sbi;
637 struct ufs_sb_private_info * uspi;
638 struct ufs_super_block_first * usb1;
639 struct ufs_super_block_second * usb2;
640 struct ufs_super_block_third * usb3;
1da177e4
LT		 641 struct ufs_buffer_head * ubh;
642 struct inode *inode;
643 unsigned block_size, super_block_size;
644 unsigned flags;
7b4ee73e 645 unsigned super_block_offset;
9e6766cc 646 unsigned maxsymlen;
b55c460d 647 int ret = -EINVAL;
1da177e4
LT		 648
649 uspi = NULL;
650 ubh = NULL;
651 flags = 0;
652
abf5d15f 653 UFSD("ENTER\n");
1da177e4 654
f8314dc6 655 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
1da177e4
LT		 656 if (!sbi)
657 goto failed_nomem;
658 sb->s_fs_info = sbi;
1da177e4 659
abf5d15f 660 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
1da177e4
LT		 661
662#ifndef CONFIG_UFS_FS_WRITE
663 if (!(sb->s_flags & MS_RDONLY)) {
664 printk("ufs was compiled with read-only support, "
665 "can't be mounted as read-write\n");
666 goto failed;
667 }
668#endif
669 /*
670 * Set default mount options
671 * Parse mount options
672 */
673 sbi->s_mount_opt = 0;
674 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
675 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
676 printk("wrong mount options\n");
677 goto failed;
678 }
679 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
680 if (!silent)
681 printk("You didn't specify the type of your ufs filesystem\n\n"
682 "mount -t ufs -o ufstype="
c690a722 683 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
1da177e4
LT		 684 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
685 "default is ufstype=old\n");
686 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
687 }
688
252e211e
MF		 689 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
690 sbi->s_uspi = uspi;
1da177e4
LT		 691 if (!uspi)
692 goto failed;
f336953b 693 uspi->s_dirblksize = UFS_SECTOR_SIZE;
7b4ee73e
E		 694 super_block_offset=UFS_SBLOCK;
695
1da177e4
LT		 696 /* Keep 2Gig file limit. Some UFS variants need to override
697 this but as I don't know which I'll let those in the know loosen
698 the rules */
1da177e4
LT		 699 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
700 case UFS_MOUNT_UFSTYPE_44BSD:
abf5d15f 701 UFSD("ufstype=44bsd\n");
1da177e4
LT		 702 uspi->s_fsize = block_size = 512;
703 uspi->s_fmask = ~(512 - 1);
704 uspi->s_fshift = 9;
705 uspi->s_sbsize = super_block_size = 1536;
706 uspi->s_sbbase = 0;
707 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
708 break;
709 case UFS_MOUNT_UFSTYPE_UFS2:
abf5d15f 710 UFSD("ufstype=ufs2\n");
7b4ee73e 711 super_block_offset=SBLOCK_UFS2;
1da177e4
LT		 712 uspi->s_fsize = block_size = 512;
713 uspi->s_fmask = ~(512 - 1);
714 uspi->s_fshift = 9;
715 uspi->s_sbsize = super_block_size = 1536;
716 uspi->s_sbbase = 0;
717 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
1da177e4
LT		 718 break;
719
720 case UFS_MOUNT_UFSTYPE_SUN:
abf5d15f 721 UFSD("ufstype=sun\n");
1da177e4
LT		 722 uspi->s_fsize = block_size = 1024;
723 uspi->s_fmask = ~(1024 - 1);
724 uspi->s_fshift = 10;
725 uspi->s_sbsize = super_block_size = 2048;
726 uspi->s_sbbase = 0;
252e211e 727 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 728 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
729 break;
730
252e211e
MF		 731 case UFS_MOUNT_UFSTYPE_SUNOS:
732 UFSD(("ufstype=sunos\n"))
733 uspi->s_fsize = block_size = 1024;
734 uspi->s_fmask = ~(1024 - 1);
735 uspi->s_fshift = 10;
736 uspi->s_sbsize = 2048;
737 super_block_size = 2048;
738 uspi->s_sbbase = 0;
739 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
740 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
741 break;
742
1da177e4 743 case UFS_MOUNT_UFSTYPE_SUNx86:
abf5d15f 744 UFSD("ufstype=sunx86\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;
252e211e 750 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 751 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
752 break;
753
754 case UFS_MOUNT_UFSTYPE_OLD:
abf5d15f 755 UFSD("ufstype=old\n");
1da177e4
LT		 756 uspi->s_fsize = block_size = 1024;
757 uspi->s_fmask = ~(1024 - 1);
758 uspi->s_fshift = 10;
759 uspi->s_sbsize = super_block_size = 2048;
760 uspi->s_sbbase = 0;
761 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
762 if (!(sb->s_flags & MS_RDONLY)) {
763 if (!silent)
764 printk(KERN_INFO "ufstype=old is supported read-only\n");
765 sb->s_flags |= MS_RDONLY;
766 }
767 break;
768
769 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
abf5d15f 770 UFSD("ufstype=nextstep\n");
1da177e4
LT		 771 uspi->s_fsize = block_size = 1024;
772 uspi->s_fmask = ~(1024 - 1);
773 uspi->s_fshift = 10;
774 uspi->s_sbsize = super_block_size = 2048;
775 uspi->s_sbbase = 0;
0c664f97 776 uspi->s_dirblksize = 1024;
1da177e4
LT		 777 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
778 if (!(sb->s_flags & MS_RDONLY)) {
779 if (!silent)
780 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
781 sb->s_flags |= MS_RDONLY;
782 }
783 break;
784
785 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
abf5d15f 786 UFSD("ufstype=nextstep-cd\n");
1da177e4
LT		 787 uspi->s_fsize = block_size = 2048;
788 uspi->s_fmask = ~(2048 - 1);
789 uspi->s_fshift = 11;
790 uspi->s_sbsize = super_block_size = 2048;
791 uspi->s_sbbase = 0;
0c664f97 792 uspi->s_dirblksize = 1024;
1da177e4
LT		 793 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
794 if (!(sb->s_flags & MS_RDONLY)) {
795 if (!silent)
796 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
797 sb->s_flags |= MS_RDONLY;
798 }
799 break;
800
801 case UFS_MOUNT_UFSTYPE_OPENSTEP:
abf5d15f 802 UFSD("ufstype=openstep\n");
1da177e4
LT		 803 uspi->s_fsize = block_size = 1024;
804 uspi->s_fmask = ~(1024 - 1);
805 uspi->s_fshift = 10;
806 uspi->s_sbsize = super_block_size = 2048;
807 uspi->s_sbbase = 0;
f336953b 808 uspi->s_dirblksize = 1024;
1da177e4
LT		 809 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
810 if (!(sb->s_flags & MS_RDONLY)) {
811 if (!silent)
812 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
813 sb->s_flags |= MS_RDONLY;
814 }
815 break;
816
817 case UFS_MOUNT_UFSTYPE_HP:
abf5d15f 818 UFSD("ufstype=hp\n");
1da177e4
LT		 819 uspi->s_fsize = block_size = 1024;
820 uspi->s_fmask = ~(1024 - 1);
821 uspi->s_fshift = 10;
822 uspi->s_sbsize = super_block_size = 2048;
823 uspi->s_sbbase = 0;
824 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
825 if (!(sb->s_flags & MS_RDONLY)) {
826 if (!silent)
827 printk(KERN_INFO "ufstype=hp is supported read-only\n");
828 sb->s_flags |= MS_RDONLY;
829 }
830 break;
831 default:
832 if (!silent)
833 printk("unknown ufstype\n");
834 goto failed;
835 }
836
837again:
838 if (!sb_set_blocksize(sb, block_size)) {
839 printk(KERN_ERR "UFS: failed to set blocksize\n");
840 goto failed;
841 }
842
843 /*
844 * read ufs super block from device
845 */
7b4ee73e
E		 846
847 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
848
1da177e4
LT		 849 if (!ubh)
850 goto failed;
851
7b4ee73e
E		 852 usb1 = ubh_get_usb_first(uspi);
853 usb2 = ubh_get_usb_second(uspi);
854 usb3 = ubh_get_usb_third(uspi);
1da177e4 855
252e211e
MF		 856 /* Sort out mod used on SunOS 4.1.3 for fs_state */
857 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
858 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
859 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
860 flags &= ~UFS_ST_MASK;
861 flags |= UFS_ST_SUN;
862 }
863
1da177e4
LT		 864 /*
865 * Check ufs magic number
866 */
867 sbi->s_bytesex = BYTESEX_LE;
868 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
869 case UFS_MAGIC:
870 case UFS2_MAGIC:
871 case UFS_MAGIC_LFN:
872 case UFS_MAGIC_FEA:
873 case UFS_MAGIC_4GB:
874 goto magic_found;
875 }
876 sbi->s_bytesex = BYTESEX_BE;
877 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
878 case UFS_MAGIC:
879 case UFS2_MAGIC:
880 case UFS_MAGIC_LFN:
881 case UFS_MAGIC_FEA:
882 case UFS_MAGIC_4GB:
883 goto magic_found;
884 }
885
886 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
887 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
888 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
889 && uspi->s_sbbase < 256) {
890 ubh_brelse_uspi(uspi);
891 ubh = NULL;
892 uspi->s_sbbase += 8;
893 goto again;
894 }
895 if (!silent)
896 printk("ufs_read_super: bad magic number\n");
897 goto failed;
898
899magic_found:
900 /*
901 * Check block and fragment sizes
902 */
903 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
904 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
905 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
906 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
907 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
908
9e8c4273 909 if (!is_power_of_2(uspi->s_fsize)) {
1da177e4
LT		 910 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
911 uspi->s_fsize);
912 goto failed;
913 }
914 if (uspi->s_fsize < 512) {
915 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
916 uspi->s_fsize);
917 goto failed;
918 }
919 if (uspi->s_fsize > 4096) {
920 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
921 uspi->s_fsize);
922 goto failed;
923 }
9e8c4273 924 if (!is_power_of_2(uspi->s_bsize)) {
1da177e4
LT		 925 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
926 uspi->s_bsize);
927 goto failed;
928 }
929 if (uspi->s_bsize < 4096) {
930 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
931 uspi->s_bsize);
932 goto failed;
933 }
934 if (uspi->s_bsize / uspi->s_fsize > 8) {
935 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
936 uspi->s_bsize / uspi->s_fsize);
937 goto failed;
938 }
939 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
940 ubh_brelse_uspi(uspi);
941 ubh = NULL;
942 block_size = uspi->s_fsize;
943 super_block_size = uspi->s_sbsize;
abf5d15f 944 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1da177e4
LT		 945 goto again;
946 }
947
f664f1f9 948 sbi->s_flags = flags;/*after that line some functions use s_flags*/
3313e292 949 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1da177e4
LT		 950
951 /*
952 * Check, if file system was correctly unmounted.
953 * If not, make it read only.
954 */
f664f1f9
AM		 955 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
956 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
957 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
958 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
959 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
960 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1da177e4
LT		 961 switch(usb1->fs_clean) {
962 case UFS_FSCLEAN:
abf5d15f 963 UFSD("fs is clean\n");
1da177e4
LT		 964 break;
965 case UFS_FSSTABLE:
abf5d15f 966 UFSD("fs is stable\n");
1da177e4
LT		 967 break;
968 case UFS_FSOSF1:
abf5d15f 969 UFSD("fs is DEC OSF/1\n");
1da177e4
LT		 970 break;
971 case UFS_FSACTIVE:
972 printk("ufs_read_super: fs is active\n");
973 sb->s_flags |= MS_RDONLY;
974 break;
975 case UFS_FSBAD:
976 printk("ufs_read_super: fs is bad\n");
977 sb->s_flags |= MS_RDONLY;
978 break;
979 default:
980 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
981 sb->s_flags |= MS_RDONLY;
982 break;
983 }
ee3ffd6c 984 } else {
1da177e4
LT		 985 printk("ufs_read_super: fs needs fsck\n");
986 sb->s_flags |= MS_RDONLY;
987 }
988
989 /*
990 * Read ufs_super_block into internal data structures
991 */
992 sb->s_op = &ufs_super_ops;
993 sb->dq_op = NULL; /***/
994 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
995
996 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
997 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
998 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
999 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1000 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1001 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1002
1003 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
647b7e87
ED		 1004 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1005 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1006 } else {
1da177e4
LT		 1007 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1008 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1009 }
1010
1011 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1012 /* s_bsize already set */
1013 /* s_fsize already set */
1014 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1015 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1016 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1017 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1018 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1019 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
abf5d15f
ED		 1020 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1021 uspi->s_fshift);
1da177e4
LT		 1022 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1023 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1024 /* s_sbsize already set */
1025 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1026 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1027 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1028 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1029 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1030 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1031 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1032 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
3313e292
ED		 1033
1034 if (uspi->fs_magic == UFS2_MAGIC)
1035 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1036 else
1037 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1038
1da177e4
LT		 1039 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1040 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1041 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1042 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1043 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1044 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1045 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
647b7e87
ED		 1046 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1047 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1da177e4
LT		 1048 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1049 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1da177e4
LT		 1050 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1051 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1052 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1053
1054 /*
1055 * Compute another frequently used values
1056 */
1057 uspi->s_fpbmask = uspi->s_fpb - 1;
abf5d15f 1058 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 1059 uspi->s_apbshift = uspi->s_bshift - 3;
abf5d15f 1060 else
1da177e4 1061 uspi->s_apbshift = uspi->s_bshift - 2;
abf5d15f 1062
1da177e4
LT		 1063 uspi->s_2apbshift = uspi->s_apbshift * 2;
1064 uspi->s_3apbshift = uspi->s_apbshift * 3;
1065 uspi->s_apb = 1 << uspi->s_apbshift;
1066 uspi->s_2apb = 1 << uspi->s_2apbshift;
1067 uspi->s_3apb = 1 << uspi->s_3apbshift;
1068 uspi->s_apbmask = uspi->s_apb - 1;
1069 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1070 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1071 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1072 uspi->s_bpf = uspi->s_fsize << 3;
1073 uspi->s_bpfshift = uspi->s_fshift + 3;
1074 uspi->s_bpfmask = uspi->s_bpf - 1;
90b315af
ED		 1075 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1076 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1da177e4 1077 uspi->s_maxsymlinklen =
647b7e87 1078 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1da177e4 1079
9e6766cc
DG		 1080 if (uspi->fs_magic == UFS2_MAGIC)
1081 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1082 else
1083 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1084 if (uspi->s_maxsymlinklen > maxsymlen) {
1085 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1086 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1087 uspi->s_maxsymlinklen = maxsymlen;
1088 }
1089
b55c460d
DH		 1090 inode = ufs_iget(sb, UFS_ROOTINO);
1091 if (IS_ERR(inode)) {
1092 ret = PTR_ERR(inode);
1da177e4 1093 goto failed;
b55c460d 1094 }
1da177e4 1095 sb->s_root = d_alloc_root(inode);
b55c460d
DH		 1096 if (!sb->s_root) {
1097 ret = -ENOMEM;
1da177e4 1098 goto dalloc_failed;
b55c460d 1099 }
1da177e4 1100
ee3ffd6c 1101 ufs_setup_cstotal(sb);
1da177e4
LT		 1102 /*
1103 * Read cylinder group structures
1104 */
1105 if (!(sb->s_flags & MS_RDONLY))
1106 if (!ufs_read_cylinder_structures(sb))
1107 goto failed;
1108
abf5d15f 1109 UFSD("EXIT\n");
1da177e4
LT		 1110 return 0;
1111
1112dalloc_failed:
1113 iput(inode);
1114failed:
f99d49ad
JJ		 1115 if (ubh)
1116 ubh_brelse_uspi (uspi);
1117 kfree (uspi);
1118 kfree(sbi);
1da177e4 1119 sb->s_fs_info = NULL;
abf5d15f 1120 UFSD("EXIT (FAILED)\n");
b55c460d 1121 return ret;
1da177e4
LT		 1122
1123failed_nomem:
abf5d15f 1124 UFSD("EXIT (NOMEM)\n");
1da177e4
LT		 1125 return -ENOMEM;
1126}
1127
647b7e87
ED		 1128static void ufs_write_super(struct super_block *sb)
1129{
1da177e4
LT		 1130 struct ufs_sb_private_info * uspi;
1131 struct ufs_super_block_first * usb1;
1132 struct ufs_super_block_third * usb3;
1133 unsigned flags;
1134
ebc1ac16 1135 lock_super(sb);
1da177e4 1136 lock_kernel();
abf5d15f 1137 UFSD("ENTER\n");
1da177e4
LT		 1138 flags = UFS_SB(sb)->s_flags;
1139 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e
E		 1140 usb1 = ubh_get_usb_first(uspi);
1141 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1142
1143 if (!(sb->s_flags & MS_RDONLY)) {
1144 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1145 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1146 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1147 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1148 ufs_set_fs_state(sb, usb1, usb3,
1149 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
ee3ffd6c 1150 ufs_put_cstotal(sb);
1da177e4
LT		 1151 }
1152 sb->s_dirt = 0;
abf5d15f 1153 UFSD("EXIT\n");
1da177e4 1154 unlock_kernel();
ebc1ac16 1155 unlock_super(sb);
1da177e4
LT		 1156}
1157
abf5d15f 1158static void ufs_put_super(struct super_block *sb)
1da177e4
LT		 1159{
1160 struct ufs_sb_info * sbi = UFS_SB(sb);
1161
abf5d15f 1162 UFSD("ENTER\n");
1da177e4 1163
8c85e125
CH		 1164 if (sb->s_dirt)
1165 ufs_write_super(sb);
1166
1da177e4 1167 if (!(sb->s_flags & MS_RDONLY))
ee3ffd6c 1168 ufs_put_super_internal(sb);
1da177e4
LT		 1169
1170 ubh_brelse_uspi (sbi->s_uspi);
1171 kfree (sbi->s_uspi);
1172 kfree (sbi);
1173 sb->s_fs_info = NULL;
647b7e87 1174 UFSD("EXIT\n");
1da177e4
LT		 1175 return;
1176}
1177
1178
1179static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1180{
1181 struct ufs_sb_private_info * uspi;
1182 struct ufs_super_block_first * usb1;
1183 struct ufs_super_block_third * usb3;
1184 unsigned new_mount_opt, ufstype;
1185 unsigned flags;
337eb00a
AIB		 1186
1187 lock_kernel();
bbd6851a 1188 lock_super(sb);
1da177e4
LT		 1189 uspi = UFS_SB(sb)->s_uspi;
1190 flags = UFS_SB(sb)->s_flags;
7b4ee73e
E		 1191 usb1 = ubh_get_usb_first(uspi);
1192 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1193
1194 /*
1195 * Allow the "check" option to be passed as a remount option.
1196 * It is not possible to change ufstype option during remount
1197 */
1198 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1199 new_mount_opt = 0;
1200 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
bbd6851a
AV		 1201 if (!ufs_parse_options (data, &new_mount_opt)) {
1202 unlock_super(sb);
337eb00a 1203 unlock_kernel();
1da177e4 1204 return -EINVAL;
bbd6851a 1205 }
1da177e4
LT		 1206 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1207 new_mount_opt |= ufstype;
ee3ffd6c 1208 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1da177e4 1209 printk("ufstype can't be changed during remount\n");
bbd6851a 1210 unlock_super(sb);
337eb00a 1211 unlock_kernel();
1da177e4
LT		 1212 return -EINVAL;
1213 }
1214
1215 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1216 UFS_SB(sb)->s_mount_opt = new_mount_opt;
bbd6851a 1217 unlock_super(sb);
337eb00a 1218 unlock_kernel();
1da177e4
LT		 1219 return 0;
1220 }
1221
1222 /*
1223 * fs was mouted as rw, remounting ro
1224 */
1225 if (*mount_flags & MS_RDONLY) {
ee3ffd6c 1226 ufs_put_super_internal(sb);
1da177e4
LT		 1227 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1228 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1229 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1230 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1231 ufs_set_fs_state(sb, usb1, usb3,
1232 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1233 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1da177e4
LT		 1234 sb->s_dirt = 0;
1235 sb->s_flags |= MS_RDONLY;
ee3ffd6c 1236 } else {
1da177e4
LT		 1237 /*
1238 * fs was mounted as ro, remounting rw
1239 */
1da177e4
LT		 1240#ifndef CONFIG_UFS_FS_WRITE
1241 printk("ufs was compiled with read-only support, "
1242 "can't be mounted as read-write\n");
bbd6851a 1243 unlock_super(sb);
337eb00a 1244 unlock_kernel();
1da177e4
LT		 1245 return -EINVAL;
1246#else
1247 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
252e211e 1248 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1da177e4 1249 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
cbcae39f
ED		 1250 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1251 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1da177e4 1252 printk("this ufstype is read-only supported\n");
bbd6851a 1253 unlock_super(sb);
337eb00a 1254 unlock_kernel();
1da177e4
LT		 1255 return -EINVAL;
1256 }
ee3ffd6c 1257 if (!ufs_read_cylinder_structures(sb)) {
1da177e4 1258 printk("failed during remounting\n");
bbd6851a 1259 unlock_super(sb);
337eb00a 1260 unlock_kernel();
1da177e4
LT		 1261 return -EPERM;
1262 }
1263 sb->s_flags &= ~MS_RDONLY;
1264#endif
1265 }
1266 UFS_SB(sb)->s_mount_opt = new_mount_opt;
bbd6851a 1267 unlock_super(sb);
337eb00a 1268 unlock_kernel();
1da177e4
LT		 1269 return 0;
1270}
1271
2a9807c0
ED		 1272static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1273{
1274 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1275 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
a447c093 1276 const struct match_token *tp = tokens;
2a9807c0
ED		 1277
1278 while (tp->token != Opt_onerror_panic && tp->token != mval)
1279 ++tp;
1280 BUG_ON(tp->token == Opt_onerror_panic);
1281 seq_printf(seq, ",%s", tp->pattern);
1282
1283 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1284 while (tp->token != Opt_err && tp->token != mval)
1285 ++tp;
1286 BUG_ON(tp->token == Opt_err);
1287 seq_printf(seq, ",%s", tp->pattern);
1288
1289 return 0;
1290}
1291
647b7e87 1292static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1293{
726c3342 1294 struct super_block *sb = dentry->d_sb;
647b7e87
ED		 1295 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1296 unsigned flags = UFS_SB(sb)->s_flags;
1297 struct ufs_super_block_first *usb1;
1298 struct ufs_super_block_second *usb2;
1299 struct ufs_super_block_third *usb3;
41d577aa 1300 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1da177e4
LT		 1301
1302 lock_kernel();
1303
647b7e87
ED		 1304 usb1 = ubh_get_usb_first(uspi);
1305 usb2 = ubh_get_usb_second(uspi);
1306 usb3 = ubh_get_usb_third(uspi);
1da177e4 1307
1da177e4
LT		 1308 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1309 buf->f_type = UFS2_MAGIC;
647b7e87 1310 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
647b7e87 1311 } else {
1da177e4
LT		 1312 buf->f_type = UFS_MAGIC;
1313 buf->f_blocks = uspi->s_dsize;
1da177e4 1314 }
ee3ffd6c
ED		 1315 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1316 uspi->cs_total.cs_nffree;
1317 buf->f_ffree = uspi->cs_total.cs_nifree;
1da177e4
LT		 1318 buf->f_bsize = sb->s_blocksize;
1319 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1320 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1321 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1322 buf->f_namelen = UFS_MAXNAMLEN;
41d577aa
CL		 1323 buf->f_fsid.val[0] = (u32)id;
1324 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 1325
1326 unlock_kernel();
1327
1328 return 0;
1329}
1330
e18b890b 1331static struct kmem_cache * ufs_inode_cachep;
1da177e4
LT		 1332
1333static struct inode *ufs_alloc_inode(struct super_block *sb)
1334{
1335 struct ufs_inode_info *ei;
e94b1766 1336 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 1337 if (!ei)
1338 return NULL;
1339 ei->vfs_inode.i_version = 1;
1340 return &ei->vfs_inode;
1341}
1342
1343static void ufs_destroy_inode(struct inode *inode)
1344{
1345 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1346}
1347
51cc5068 1348static void init_once(void *foo)
1da177e4
LT		 1349{
1350 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1351
a35afb83 1352 inode_init_once(&ei->vfs_inode);
1da177e4 1353}
20c2df83 1354
1da177e4
LT		 1355static int init_inodecache(void)
1356{
1357 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1358 sizeof(struct ufs_inode_info),
fffb60f9
PJ		 1359 0, (SLAB_RECLAIM_ACCOUNT|
1360 SLAB_MEM_SPREAD),
20c2df83 1361 init_once);
1da177e4
LT		 1362 if (ufs_inode_cachep == NULL)
1363 return -ENOMEM;
1364 return 0;
1365}
1366
1367static void destroy_inodecache(void)
1368{
1a1d92c1 1369 kmem_cache_destroy(ufs_inode_cachep);
1da177e4
LT		 1370}
1371
1372#ifdef CONFIG_QUOTA
1373static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1374static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1375#endif
1376
ee9b6d61 1377static const struct super_operations ufs_super_ops = {
1da177e4
LT		 1378 .alloc_inode = ufs_alloc_inode,
1379 .destroy_inode = ufs_destroy_inode,
1da177e4
LT		 1380 .write_inode = ufs_write_inode,
1381 .delete_inode = ufs_delete_inode,
1382 .put_super = ufs_put_super,
1383 .write_super = ufs_write_super,
1384 .statfs = ufs_statfs,
1385 .remount_fs = ufs_remount,
2a9807c0 1386 .show_options = ufs_show_options,
1da177e4
LT		 1387#ifdef CONFIG_QUOTA
1388 .quota_read = ufs_quota_read,
1389 .quota_write = ufs_quota_write,
1390#endif
1391};
1392
1393#ifdef CONFIG_QUOTA
1394
1395/* Read data from quotafile - avoid pagecache and such because we cannot afford
1396 * acquiring the locks... As quota files are never truncated and quota code
1397 * itself serializes the operations (and noone else should touch the files)
1398 * we don't have to be afraid of races */
1399static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1400 size_t len, loff_t off)
1401{
1402 struct inode *inode = sb_dqopt(sb)->files[type];
1403 sector_t blk = off >> sb->s_blocksize_bits;
1404 int err = 0;
1405 int offset = off & (sb->s_blocksize - 1);
1406 int tocopy;
1407 size_t toread;
1408 struct buffer_head *bh;
1409 loff_t i_size = i_size_read(inode);
1410
1411 if (off > i_size)
1412 return 0;
1413 if (off+len > i_size)
1414 len = i_size-off;
1415 toread = len;
1416 while (toread > 0) {
1417 tocopy = sb->s_blocksize - offset < toread ?
1418 sb->s_blocksize - offset : toread;
1419
1420 bh = ufs_bread(inode, blk, 0, &err);
1421 if (err)
1422 return err;
1423 if (!bh) /* A hole? */
1424 memset(data, 0, tocopy);
1425 else {
1426 memcpy(data, bh->b_data+offset, tocopy);
1427 brelse(bh);
1428 }
1429 offset = 0;
1430 toread -= tocopy;
1431 data += tocopy;
1432 blk++;
1433 }
1434 return len;
1435}
1436
1437/* Write to quotafile */
1438static ssize_t ufs_quota_write(struct super_block *sb, int type,
1439 const char *data, size_t len, loff_t off)
1440{
1441 struct inode *inode = sb_dqopt(sb)->files[type];
1442 sector_t blk = off >> sb->s_blocksize_bits;
1443 int err = 0;
1444 int offset = off & (sb->s_blocksize - 1);
1445 int tocopy;
1446 size_t towrite = len;
1447 struct buffer_head *bh;
1448
5c81a419 1449 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1da177e4
LT		 1450 while (towrite > 0) {
1451 tocopy = sb->s_blocksize - offset < towrite ?
1452 sb->s_blocksize - offset : towrite;
1453
1454 bh = ufs_bread(inode, blk, 1, &err);
1455 if (!bh)
1456 goto out;
1457 lock_buffer(bh);
1458 memcpy(bh->b_data+offset, data, tocopy);
1459 flush_dcache_page(bh->b_page);
1460 set_buffer_uptodate(bh);
1461 mark_buffer_dirty(bh);
1462 unlock_buffer(bh);
1463 brelse(bh);
1464 offset = 0;
1465 towrite -= tocopy;
1466 data += tocopy;
1467 blk++;
1468 }
1469out:
15b2fe39 1470 if (len == towrite) {
1b1dcc1b 1471 mutex_unlock(&inode->i_mutex);
1da177e4 1472 return err;
15b2fe39 1473 }
1da177e4
LT		 1474 if (inode->i_size < off+len-towrite)
1475 i_size_write(inode, off+len-towrite);
1476 inode->i_version++;
1477 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1478 mark_inode_dirty(inode);
1b1dcc1b 1479 mutex_unlock(&inode->i_mutex);
1da177e4
LT		 1480 return len - towrite;
1481}
1482
1483#endif
1484
454e2398
DH		 1485static int ufs_get_sb(struct file_system_type *fs_type,
1486 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1da177e4 1487{
454e2398 1488 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1da177e4
LT		 1489}
1490
1491static struct file_system_type ufs_fs_type = {
1492 .owner = THIS_MODULE,
1493 .name = "ufs",
1494 .get_sb = ufs_get_sb,
1495 .kill_sb = kill_block_super,
1496 .fs_flags = FS_REQUIRES_DEV,
1497};
1498
1499static int __init init_ufs_fs(void)
1500{
1501 int err = init_inodecache();
1502 if (err)
1503 goto out1;
1504 err = register_filesystem(&ufs_fs_type);
1505 if (err)
1506 goto out;
1507 return 0;
1508out:
1509 destroy_inodecache();
1510out1:
1511 return err;
1512}
1513
1514static void __exit exit_ufs_fs(void)
1515{
1516 unregister_filesystem(&ufs_fs_type);
1517 destroy_inodecache();
1518}
1519
1520module_init(init_ufs_fs)
1521module_exit(exit_ufs_fs)
1522MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)