?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Staging: wireless drivers Kconfig change
[linux-2.6/mini2440.git] / fs / ufs / super.c
blob5faed7954d0a15165b9223fcc3c30fc3c5946846
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 <gwingerde@gmail.com>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
66 */
67
68
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/quotaops.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>
90 #include <linux/log2.h>
91 #include <linux/mount.h>
92 #include <linux/seq_file.h>
93
94 #include "ufs_fs.h"
95 #include "ufs.h"
96 #include "swab.h"
97 #include "util.h"
98
99 #ifdef CONFIG_UFS_DEBUG
100 /*
101 * Print contents of ufs_super_block, useful for debugging
102 */
103 static void ufs_print_super_stuff(struct super_block *sb,
104 struct ufs_super_block_first *usb1,
105 struct ufs_super_block_second *usb2,
106 struct ufs_super_block_third *usb3)
107 {
108 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
109
110 printk("ufs_print_super_stuff\n");
111 printk(" magic: 0x%x\n", magic);
112 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
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));
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));
135 printk(KERN_INFO" fs_maxsymlinklen: %u\n",
136 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
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 }
176 printk("\n");
177 }
178
179 /*
180 * Print contents of ufs_cylinder_group, useful for debugging
181 */
182 static void ufs_print_cylinder_stuff(struct super_block *sb,
183 struct ufs_cylinder_group *cg)
184 {
185 printk("\nufs_print_cylinder_stuff\n");
186 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
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));
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));
216 printk("\n");
217 }
218 #else
219 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
220 # define ufs_print_cylinder_stuff(sb, cg) /**/
221 #endif /* CONFIG_UFS_DEBUG */
222
223 static const struct super_operations ufs_super_ops;
224
225 static char error_buf[1024];
226
227 void 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;
235 usb1 = ubh_get_usb_first(uspi);
236
237 if (!(sb->s_flags & MS_RDONLY)) {
238 usb1->fs_clean = UFS_FSBAD;
239 ubh_mark_buffer_dirty(USPI_UBH(uspi));
240 sb->s_dirt = 1;
241 sb->s_flags |= MS_RDONLY;
242 }
243 va_start (args, fmt);
244 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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
259 void 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
266 lock_kernel();
267 uspi = UFS_SB(sb)->s_uspi;
268 usb1 = ubh_get_usb_first(uspi);
269
270 if (!(sb->s_flags & MS_RDONLY)) {
271 usb1->fs_clean = UFS_FSBAD;
272 ubh_mark_buffer_dirty(USPI_UBH(uspi));
273 sb->s_dirt = 1;
274 }
275 va_start (args, fmt);
276 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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
283 void ufs_warning (struct super_block * sb, const char * function,
284 const char * fmt, ...)
285 {
286 va_list args;
287
288 va_start (args, fmt);
289 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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
295 enum {
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
311 };
312
313 static const match_table_t tokens = {
314 {Opt_type_old, "ufstype=old"},
315 {Opt_type_sunx86, "ufstype=sunx86"},
316 {Opt_type_sun, "ufstype=sun"},
317 {Opt_type_sunos, "ufstype=sunos"},
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"},
325 /*end of possible ufs types */
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
333 static int ufs_parse_options (char * options, unsigned * mount_options)
334 {
335 char * p;
336
337 UFSD("ENTER\n");
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;
362 case Opt_type_sunos:
363 ufs_clear_opt(*mount_options, UFSTYPE);
364 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
365 break;
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 /*
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
421 */
422 static void ufs_setup_cstotal(struct super_block *sb)
423 {
424 struct ufs_sb_info *sbi = UFS_SB(sb);
425 struct ufs_sb_private_info *uspi = sbi->s_uspi;
426 struct ufs_super_block_first *usb1;
427 struct ufs_super_block_second *usb2;
428 struct ufs_super_block_third *usb3;
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 */
456 static 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;
460 struct ufs_buffer_head * ubh;
461 unsigned char * base, * space;
462 unsigned size, blks, i;
463 struct ufs_super_block_third *usb3;
464
465 UFSD("ENTER\n");
466
467 usb3 = ubh_get_usb_third(uspi);
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;
477 sbi->s_csp = (struct ufs_csum *)space;
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
483 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
484
485 if (!ubh)
486 goto failed;
487
488 ubh_ubhcpymem (space, ubh, size);
489
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++) {
508 UFSD("read cg %u\n", i);
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;
513
514 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
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;
522 UFSD("EXIT\n");
523 return 1;
524
525 failed:
526 kfree (base);
527 if (sbi->s_ucg) {
528 for (i = 0; i < uspi->s_ncg; i++)
529 if (sbi->s_ucg[i])
530 brelse (sbi->s_ucg[i]);
531 kfree (sbi->s_ucg);
532 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
533 kfree (sbi->s_ucpi[i]);
534 }
535 UFSD("EXIT (FAILED)\n");
536 return 0;
537 }
538
539 /*
540 * Sync our internal copy of fs_cstotal with disk
541 */
542 static void ufs_put_cstotal(struct super_block *sb)
543 {
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));
578 ufs_print_super_stuff(sb, usb1, usb2, usb3);
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 */
588 static 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;
592 struct ufs_buffer_head * ubh;
593 unsigned char * base, * space;
594 unsigned blks, size, i;
595
596
597 UFSD("ENTER\n");
598
599 lock_kernel();
600
601 ufs_put_cstotal(sb);
602 size = uspi->s_cssize;
603 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
604 base = space = (char*) sbi->s_csp;
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;
609
610 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
611
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);
628
629 unlock_kernel();
630
631 UFSD("EXIT\n");
632 }
633
634 static 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;
641 struct ufs_buffer_head * ubh;
642 struct inode *inode;
643 unsigned block_size, super_block_size;
644 unsigned flags;
645 unsigned super_block_offset;
646 unsigned maxsymlen;
647 int ret = -EINVAL;
648
649 uspi = NULL;
650 ubh = NULL;
651 flags = 0;
652
653 UFSD("ENTER\n");
654
655 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
656 if (!sbi)
657 goto failed_nomem;
658 sb->s_fs_info = sbi;
659
660 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
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="
683 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
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
689 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
690 sbi->s_uspi = uspi;
691 if (!uspi)
692 goto failed;
693 uspi->s_dirblksize = UFS_SECTOR_SIZE;
694 super_block_offset=UFS_SBLOCK;
695
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 */
699 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
700 case UFS_MOUNT_UFSTYPE_44BSD:
701 UFSD("ufstype=44bsd\n");
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:
710 UFSD("ufstype=ufs2\n");
711 super_block_offset=SBLOCK_UFS2;
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;
718 break;
719
720 case UFS_MOUNT_UFSTYPE_SUN:
721 UFSD("ufstype=sun\n");
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;
727 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
728 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
729 break;
730
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
743 case UFS_MOUNT_UFSTYPE_SUNx86:
744 UFSD("ufstype=sunx86\n");
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 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
751 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
752 break;
753
754 case UFS_MOUNT_UFSTYPE_OLD:
755 UFSD("ufstype=old\n");
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:
770 UFSD("ufstype=nextstep\n");
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;
776 uspi->s_dirblksize = 1024;
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:
786 UFSD("ufstype=nextstep-cd\n");
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;
792 uspi->s_dirblksize = 1024;
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:
802 UFSD("ufstype=openstep\n");
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;
808 uspi->s_dirblksize = 1024;
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:
818 UFSD("ufstype=hp\n");
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
837 again:
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 */
846
847 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
848
849 if (!ubh)
850 goto failed;
851
852 usb1 = ubh_get_usb_first(uspi);
853 usb2 = ubh_get_usb_second(uspi);
854 usb3 = ubh_get_usb_third(uspi);
855
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
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
899 magic_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
909 if (!is_power_of_2(uspi->s_fsize)) {
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 }
924 if (!is_power_of_2(uspi->s_bsize)) {
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;
944 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
945 goto again;
946 }
947
948 sbi->s_flags = flags;/*after that line some functions use s_flags*/
949 ufs_print_super_stuff(sb, usb1, usb2, usb3);
950
951 /*
952 * Check, if file system was correctly unmounted.
953 * If not, make it read only.
954 */
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))))) {
961 switch(usb1->fs_clean) {
962 case UFS_FSCLEAN:
963 UFSD("fs is clean\n");
964 break;
965 case UFS_FSSTABLE:
966 UFSD("fs is stable\n");
967 break;
968 case UFS_FSOSF1:
969 UFSD("fs is DEC OSF/1\n");
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 }
984 } else {
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) {
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 {
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);
1020 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1021 uspi->s_fshift);
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);
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
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);
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);
1048 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1049 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
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;
1058 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1059 uspi->s_apbshift = uspi->s_bshift - 3;
1060 else
1061 uspi->s_apbshift = uspi->s_bshift - 2;
1062
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;
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)
1077 uspi->s_maxsymlinklen =
1078 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1079
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
1090 inode = ufs_iget(sb, UFS_ROOTINO);
1091 if (IS_ERR(inode)) {
1092 ret = PTR_ERR(inode);
1093 goto failed;
1094 }
1095 sb->s_root = d_alloc_root(inode);
1096 if (!sb->s_root) {
1097 ret = -ENOMEM;
1098 goto dalloc_failed;
1099 }
1100
1101 ufs_setup_cstotal(sb);
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
1109 UFSD("EXIT\n");
1110 return 0;
1111
1112 dalloc_failed:
1113 iput(inode);
1114 failed:
1115 if (ubh)
1116 ubh_brelse_uspi (uspi);
1117 kfree (uspi);
1118 kfree(sbi);
1119 sb->s_fs_info = NULL;
1120 UFSD("EXIT (FAILED)\n");
1121 return ret;
1122
1123 failed_nomem:
1124 UFSD("EXIT (NOMEM)\n");
1125 return -ENOMEM;
1126 }
1127
1128 static int ufs_sync_fs(struct super_block *sb, int wait)
1129 {
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
1135 lock_super(sb);
1136 lock_kernel();
1137
1138 UFSD("ENTER\n");
1139
1140 flags = UFS_SB(sb)->s_flags;
1141 uspi = UFS_SB(sb)->s_uspi;
1142 usb1 = ubh_get_usb_first(uspi);
1143 usb3 = ubh_get_usb_third(uspi);
1144
1145 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1146 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1147 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1148 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1149 ufs_set_fs_state(sb, usb1, usb3,
1150 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1151 ufs_put_cstotal(sb);
1152 sb->s_dirt = 0;
1153
1154 UFSD("EXIT\n");
1155 unlock_kernel();
1156 unlock_super(sb);
1157
1158 return 0;
1159 }
1160
1161 static void ufs_write_super(struct super_block *sb)
1162 {
1163 if (!(sb->s_flags & MS_RDONLY))
1164 ufs_sync_fs(sb, 1);
1165 else
1166 sb->s_dirt = 0;
1167 }
1168
1169 static void ufs_put_super(struct super_block *sb)
1170 {
1171 struct ufs_sb_info * sbi = UFS_SB(sb);
1172
1173 UFSD("ENTER\n");
1174
1175 if (sb->s_dirt)
1176 ufs_write_super(sb);
1177
1178 if (!(sb->s_flags & MS_RDONLY))
1179 ufs_put_super_internal(sb);
1180
1181 ubh_brelse_uspi (sbi->s_uspi);
1182 kfree (sbi->s_uspi);
1183 kfree (sbi);
1184 sb->s_fs_info = NULL;
1185 UFSD("EXIT\n");
1186 return;
1187 }
1188
1189
1190 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1191 {
1192 struct ufs_sb_private_info * uspi;
1193 struct ufs_super_block_first * usb1;
1194 struct ufs_super_block_third * usb3;
1195 unsigned new_mount_opt, ufstype;
1196 unsigned flags;
1197
1198 lock_kernel();
1199 lock_super(sb);
1200 uspi = UFS_SB(sb)->s_uspi;
1201 flags = UFS_SB(sb)->s_flags;
1202 usb1 = ubh_get_usb_first(uspi);
1203 usb3 = ubh_get_usb_third(uspi);
1204
1205 /*
1206 * Allow the "check" option to be passed as a remount option.
1207 * It is not possible to change ufstype option during remount
1208 */
1209 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1210 new_mount_opt = 0;
1211 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1212 if (!ufs_parse_options (data, &new_mount_opt)) {
1213 unlock_super(sb);
1214 unlock_kernel();
1215 return -EINVAL;
1216 }
1217 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1218 new_mount_opt |= ufstype;
1219 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1220 printk("ufstype can't be changed during remount\n");
1221 unlock_super(sb);
1222 unlock_kernel();
1223 return -EINVAL;
1224 }
1225
1226 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1227 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1228 unlock_super(sb);
1229 unlock_kernel();
1230 return 0;
1231 }
1232
1233 /*
1234 * fs was mouted as rw, remounting ro
1235 */
1236 if (*mount_flags & MS_RDONLY) {
1237 ufs_put_super_internal(sb);
1238 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1239 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1240 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1241 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1242 ufs_set_fs_state(sb, usb1, usb3,
1243 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1244 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1245 sb->s_dirt = 0;
1246 sb->s_flags |= MS_RDONLY;
1247 } else {
1248 /*
1249 * fs was mounted as ro, remounting rw
1250 */
1251 #ifndef CONFIG_UFS_FS_WRITE
1252 printk("ufs was compiled with read-only support, "
1253 "can't be mounted as read-write\n");
1254 unlock_super(sb);
1255 unlock_kernel();
1256 return -EINVAL;
1257 #else
1258 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1259 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1260 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1261 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1262 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1263 printk("this ufstype is read-only supported\n");
1264 unlock_super(sb);
1265 unlock_kernel();
1266 return -EINVAL;
1267 }
1268 if (!ufs_read_cylinder_structures(sb)) {
1269 printk("failed during remounting\n");
1270 unlock_super(sb);
1271 unlock_kernel();
1272 return -EPERM;
1273 }
1274 sb->s_flags &= ~MS_RDONLY;
1275 #endif
1276 }
1277 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1278 unlock_super(sb);
1279 unlock_kernel();
1280 return 0;
1281 }
1282
1283 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1284 {
1285 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1286 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1287 const struct match_token *tp = tokens;
1288
1289 while (tp->token != Opt_onerror_panic && tp->token != mval)
1290 ++tp;
1291 BUG_ON(tp->token == Opt_onerror_panic);
1292 seq_printf(seq, ",%s", tp->pattern);
1293
1294 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1295 while (tp->token != Opt_err && tp->token != mval)
1296 ++tp;
1297 BUG_ON(tp->token == Opt_err);
1298 seq_printf(seq, ",%s", tp->pattern);
1299
1300 return 0;
1301 }
1302
1303 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1304 {
1305 struct super_block *sb = dentry->d_sb;
1306 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1307 unsigned flags = UFS_SB(sb)->s_flags;
1308 struct ufs_super_block_first *usb1;
1309 struct ufs_super_block_second *usb2;
1310 struct ufs_super_block_third *usb3;
1311 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1312
1313 lock_kernel();
1314
1315 usb1 = ubh_get_usb_first(uspi);
1316 usb2 = ubh_get_usb_second(uspi);
1317 usb3 = ubh_get_usb_third(uspi);
1318
1319 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1320 buf->f_type = UFS2_MAGIC;
1321 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1322 } else {
1323 buf->f_type = UFS_MAGIC;
1324 buf->f_blocks = uspi->s_dsize;
1325 }
1326 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1327 uspi->cs_total.cs_nffree;
1328 buf->f_ffree = uspi->cs_total.cs_nifree;
1329 buf->f_bsize = sb->s_blocksize;
1330 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1331 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1332 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1333 buf->f_namelen = UFS_MAXNAMLEN;
1334 buf->f_fsid.val[0] = (u32)id;
1335 buf->f_fsid.val[1] = (u32)(id >> 32);
1336
1337 unlock_kernel();
1338
1339 return 0;
1340 }
1341
1342 static struct kmem_cache * ufs_inode_cachep;
1343
1344 static struct inode *ufs_alloc_inode(struct super_block *sb)
1345 {
1346 struct ufs_inode_info *ei;
1347 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1348 if (!ei)
1349 return NULL;
1350 ei->vfs_inode.i_version = 1;
1351 return &ei->vfs_inode;
1352 }
1353
1354 static void ufs_destroy_inode(struct inode *inode)
1355 {
1356 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1357 }
1358
1359 static void init_once(void *foo)
1360 {
1361 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1362
1363 inode_init_once(&ei->vfs_inode);
1364 }
1365
1366 static int init_inodecache(void)
1367 {
1368 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1369 sizeof(struct ufs_inode_info),
1370 0, (SLAB_RECLAIM_ACCOUNT|
1371 SLAB_MEM_SPREAD),
1372 init_once);
1373 if (ufs_inode_cachep == NULL)
1374 return -ENOMEM;
1375 return 0;
1376 }
1377
1378 static void destroy_inodecache(void)
1379 {
1380 kmem_cache_destroy(ufs_inode_cachep);
1381 }
1382
1383 #ifdef CONFIG_QUOTA
1384 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1385 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1386 #endif
1387
1388 static const struct super_operations ufs_super_ops = {
1389 .alloc_inode = ufs_alloc_inode,
1390 .destroy_inode = ufs_destroy_inode,
1391 .write_inode = ufs_write_inode,
1392 .delete_inode = ufs_delete_inode,
1393 .put_super = ufs_put_super,
1394 .write_super = ufs_write_super,
1395 .sync_fs = ufs_sync_fs,
1396 .statfs = ufs_statfs,
1397 .remount_fs = ufs_remount,
1398 .show_options = ufs_show_options,
1399 #ifdef CONFIG_QUOTA
1400 .quota_read = ufs_quota_read,
1401 .quota_write = ufs_quota_write,
1402 #endif
1403 };
1404
1405 #ifdef CONFIG_QUOTA
1406
1407 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1408 * acquiring the locks... As quota files are never truncated and quota code
1409 * itself serializes the operations (and noone else should touch the files)
1410 * we don't have to be afraid of races */
1411 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1412 size_t len, loff_t off)
1413 {
1414 struct inode *inode = sb_dqopt(sb)->files[type];
1415 sector_t blk = off >> sb->s_blocksize_bits;
1416 int err = 0;
1417 int offset = off & (sb->s_blocksize - 1);
1418 int tocopy;
1419 size_t toread;
1420 struct buffer_head *bh;
1421 loff_t i_size = i_size_read(inode);
1422
1423 if (off > i_size)
1424 return 0;
1425 if (off+len > i_size)
1426 len = i_size-off;
1427 toread = len;
1428 while (toread > 0) {
1429 tocopy = sb->s_blocksize - offset < toread ?
1430 sb->s_blocksize - offset : toread;
1431
1432 bh = ufs_bread(inode, blk, 0, &err);
1433 if (err)
1434 return err;
1435 if (!bh) /* A hole? */
1436 memset(data, 0, tocopy);
1437 else {
1438 memcpy(data, bh->b_data+offset, tocopy);
1439 brelse(bh);
1440 }
1441 offset = 0;
1442 toread -= tocopy;
1443 data += tocopy;
1444 blk++;
1445 }
1446 return len;
1447 }
1448
1449 /* Write to quotafile */
1450 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1451 const char *data, size_t len, loff_t off)
1452 {
1453 struct inode *inode = sb_dqopt(sb)->files[type];
1454 sector_t blk = off >> sb->s_blocksize_bits;
1455 int err = 0;
1456 int offset = off & (sb->s_blocksize - 1);
1457 int tocopy;
1458 size_t towrite = len;
1459 struct buffer_head *bh;
1460
1461 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1462 while (towrite > 0) {
1463 tocopy = sb->s_blocksize - offset < towrite ?
1464 sb->s_blocksize - offset : towrite;
1465
1466 bh = ufs_bread(inode, blk, 1, &err);
1467 if (!bh)
1468 goto out;
1469 lock_buffer(bh);
1470 memcpy(bh->b_data+offset, data, tocopy);
1471 flush_dcache_page(bh->b_page);
1472 set_buffer_uptodate(bh);
1473 mark_buffer_dirty(bh);
1474 unlock_buffer(bh);
1475 brelse(bh);
1476 offset = 0;
1477 towrite -= tocopy;
1478 data += tocopy;
1479 blk++;
1480 }
1481 out:
1482 if (len == towrite) {
1483 mutex_unlock(&inode->i_mutex);
1484 return err;
1485 }
1486 if (inode->i_size < off+len-towrite)
1487 i_size_write(inode, off+len-towrite);
1488 inode->i_version++;
1489 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1490 mark_inode_dirty(inode);
1491 mutex_unlock(&inode->i_mutex);
1492 return len - towrite;
1493 }
1494
1495 #endif
1496
1497 static int ufs_get_sb(struct file_system_type *fs_type,
1498 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1499 {
1500 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1501 }
1502
1503 static struct file_system_type ufs_fs_type = {
1504 .owner = THIS_MODULE,
1505 .name = "ufs",
1506 .get_sb = ufs_get_sb,
1507 .kill_sb = kill_block_super,
1508 .fs_flags = FS_REQUIRES_DEV,
1509 };
1510
1511 static int __init init_ufs_fs(void)
1512 {
1513 int err = init_inodecache();
1514 if (err)
1515 goto out1;
1516 err = register_filesystem(&ufs_fs_type);
1517 if (err)
1518 goto out;
1519 return 0;
1520 out:
1521 destroy_inodecache();
1522 out1:
1523 return err;
1524 }
1525
1526 static void __exit exit_ufs_fs(void)
1527 {
1528 unregister_filesystem(&ufs_fs_type);
1529 destroy_inodecache();
1530 }
1531
1532 module_init(init_ufs_fs)
1533 module_exit(exit_ufs_fs)
1534 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards