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ARM: OMAP1: Fix compile for board-nokia770
[pv_ops_mirror.git] / fs / ufs / super.c
blob0072cb33ebec5da2f682574fbb36e809d0f1beb9
1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gertjan@cs.vu.nl>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 * 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/ufs_fs.h>
80 #include <linux/slab.h>
81 #include <linux/time.h>
82 #include <linux/stat.h>
83 #include <linux/string.h>
84 #include <linux/blkdev.h>
85 #include <linux/init.h>
86 #include <linux/parser.h>
87 #include <linux/smp_lock.h>
88 #include <linux/buffer_head.h>
89 #include <linux/vfs.h>
90 #include <linux/log2.h>
91 #include <linux/mount.h>
92 #include <linux/seq_file.h>
93
94 #include "ufs.h"
95 #include "swab.h"
96 #include "util.h"
97
98 #ifdef CONFIG_UFS_DEBUG
99 /*
100 * Print contents of ufs_super_block, useful for debugging
101 */
102 static void ufs_print_super_stuff(struct super_block *sb,
103 struct ufs_super_block_first *usb1,
104 struct ufs_super_block_second *usb2,
105 struct ufs_super_block_third *usb3)
106 {
107 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
108
109 printk("ufs_print_super_stuff\n");
110 printk(" magic: 0x%x\n", magic);
111 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
112 printk(" fs_size: %llu\n", (unsigned long long)
113 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
114 printk(" fs_dsize: %llu\n", (unsigned long long)
115 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
116 printk(" bsize: %u\n",
117 fs32_to_cpu(sb, usb1->fs_bsize));
118 printk(" fsize: %u\n",
119 fs32_to_cpu(sb, usb1->fs_fsize));
120 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
121 printk(" fs_sblockloc: %llu\n", (unsigned long long)
122 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
123 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
124 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
125 printk(" cs_nbfree(No of free blocks): %llu\n",
126 (unsigned long long)
127 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
128 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
129 (unsigned long long)
130 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
131 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
132 (unsigned long long)
133 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
134 } else {
135 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
136 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
137 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
138 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
139 printk(" cgoffset: %u\n",
140 fs32_to_cpu(sb, usb1->fs_cgoffset));
141 printk(" ~cgmask: 0x%x\n",
142 ~fs32_to_cpu(sb, usb1->fs_cgmask));
143 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
144 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
145 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
146 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
147 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
148 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
149 printk(" fragshift: %u\n",
150 fs32_to_cpu(sb, usb1->fs_fragshift));
151 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
152 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
153 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
154 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
155 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
156 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
157 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
158 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
159 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
160 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
161 printk(" fstodb: %u\n",
162 fs32_to_cpu(sb, usb1->fs_fsbtodb));
163 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
164 printk(" ndir %u\n",
165 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
166 printk(" nifree %u\n",
167 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
168 printk(" nbfree %u\n",
169 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
170 printk(" nffree %u\n",
171 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
172 }
173 printk("\n");
174 }
175
176 /*
177 * Print contents of ufs_cylinder_group, useful for debugging
178 */
179 static void ufs_print_cylinder_stuff(struct super_block *sb,
180 struct ufs_cylinder_group *cg)
181 {
182 printk("\nufs_print_cylinder_stuff\n");
183 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
184 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
185 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
186 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
187 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
188 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
189 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
190 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
191 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
192 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
193 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
194 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
195 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
196 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
197 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
198 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
199 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
200 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
201 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
202 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
203 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
204 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
205 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
206 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
207 printk(" clustersumoff %u\n",
208 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
209 printk(" clusteroff %u\n",
210 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
211 printk(" nclusterblks %u\n",
212 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
213 printk("\n");
214 }
215 #else
216 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
217 # define ufs_print_cylinder_stuff(sb, cg) /**/
218 #endif /* CONFIG_UFS_DEBUG */
219
220 static const struct super_operations ufs_super_ops;
221
222 static char error_buf[1024];
223
224 void ufs_error (struct super_block * sb, const char * function,
225 const char * fmt, ...)
226 {
227 struct ufs_sb_private_info * uspi;
228 struct ufs_super_block_first * usb1;
229 va_list args;
230
231 uspi = UFS_SB(sb)->s_uspi;
232 usb1 = ubh_get_usb_first(uspi);
233
234 if (!(sb->s_flags & MS_RDONLY)) {
235 usb1->fs_clean = UFS_FSBAD;
236 ubh_mark_buffer_dirty(USPI_UBH(uspi));
237 sb->s_dirt = 1;
238 sb->s_flags |= MS_RDONLY;
239 }
240 va_start (args, fmt);
241 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
242 va_end (args);
243 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
244 case UFS_MOUNT_ONERROR_PANIC:
245 panic ("UFS-fs panic (device %s): %s: %s\n",
246 sb->s_id, function, error_buf);
247
248 case UFS_MOUNT_ONERROR_LOCK:
249 case UFS_MOUNT_ONERROR_UMOUNT:
250 case UFS_MOUNT_ONERROR_REPAIR:
251 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
252 sb->s_id, function, error_buf);
253 }
254 }
255
256 void ufs_panic (struct super_block * sb, const char * function,
257 const char * fmt, ...)
258 {
259 struct ufs_sb_private_info * uspi;
260 struct ufs_super_block_first * usb1;
261 va_list args;
262
263 uspi = UFS_SB(sb)->s_uspi;
264 usb1 = ubh_get_usb_first(uspi);
265
266 if (!(sb->s_flags & MS_RDONLY)) {
267 usb1->fs_clean = UFS_FSBAD;
268 ubh_mark_buffer_dirty(USPI_UBH(uspi));
269 sb->s_dirt = 1;
270 }
271 va_start (args, fmt);
272 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
273 va_end (args);
274 sb->s_flags |= MS_RDONLY;
275 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
276 sb->s_id, function, error_buf);
277 }
278
279 void ufs_warning (struct super_block * sb, const char * function,
280 const char * fmt, ...)
281 {
282 va_list args;
283
284 va_start (args, fmt);
285 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
286 va_end (args);
287 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
288 sb->s_id, function, error_buf);
289 }
290
291 enum {
292 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
293 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
294 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
295 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
296 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
297 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
298 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
299 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
300 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
301 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
302 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
303 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
304 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
305 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
306 Opt_err
307 };
308
309 static match_table_t tokens = {
310 {Opt_type_old, "ufstype=old"},
311 {Opt_type_sunx86, "ufstype=sunx86"},
312 {Opt_type_sun, "ufstype=sun"},
313 {Opt_type_sunos, "ufstype=sunos"},
314 {Opt_type_44bsd, "ufstype=44bsd"},
315 {Opt_type_ufs2, "ufstype=ufs2"},
316 {Opt_type_ufs2, "ufstype=5xbsd"},
317 {Opt_type_hp, "ufstype=hp"},
318 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
319 {Opt_type_nextstep, "ufstype=nextstep"},
320 {Opt_type_openstep, "ufstype=openstep"},
321 /*end of possible ufs types */
322 {Opt_onerror_panic, "onerror=panic"},
323 {Opt_onerror_lock, "onerror=lock"},
324 {Opt_onerror_umount, "onerror=umount"},
325 {Opt_onerror_repair, "onerror=repair"},
326 {Opt_err, NULL}
327 };
328
329 static int ufs_parse_options (char * options, unsigned * mount_options)
330 {
331 char * p;
332
333 UFSD("ENTER\n");
334
335 if (!options)
336 return 1;
337
338 while ((p = strsep(&options, ",")) != NULL) {
339 substring_t args[MAX_OPT_ARGS];
340 int token;
341 if (!*p)
342 continue;
343
344 token = match_token(p, tokens, args);
345 switch (token) {
346 case Opt_type_old:
347 ufs_clear_opt (*mount_options, UFSTYPE);
348 ufs_set_opt (*mount_options, UFSTYPE_OLD);
349 break;
350 case Opt_type_sunx86:
351 ufs_clear_opt (*mount_options, UFSTYPE);
352 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
353 break;
354 case Opt_type_sun:
355 ufs_clear_opt (*mount_options, UFSTYPE);
356 ufs_set_opt (*mount_options, UFSTYPE_SUN);
357 break;
358 case Opt_type_sunos:
359 ufs_clear_opt(*mount_options, UFSTYPE);
360 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
361 break;
362 case Opt_type_44bsd:
363 ufs_clear_opt (*mount_options, UFSTYPE);
364 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
365 break;
366 case Opt_type_ufs2:
367 ufs_clear_opt(*mount_options, UFSTYPE);
368 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
369 break;
370 case Opt_type_hp:
371 ufs_clear_opt (*mount_options, UFSTYPE);
372 ufs_set_opt (*mount_options, UFSTYPE_HP);
373 break;
374 case Opt_type_nextstepcd:
375 ufs_clear_opt (*mount_options, UFSTYPE);
376 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
377 break;
378 case Opt_type_nextstep:
379 ufs_clear_opt (*mount_options, UFSTYPE);
380 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
381 break;
382 case Opt_type_openstep:
383 ufs_clear_opt (*mount_options, UFSTYPE);
384 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
385 break;
386 case Opt_onerror_panic:
387 ufs_clear_opt (*mount_options, ONERROR);
388 ufs_set_opt (*mount_options, ONERROR_PANIC);
389 break;
390 case Opt_onerror_lock:
391 ufs_clear_opt (*mount_options, ONERROR);
392 ufs_set_opt (*mount_options, ONERROR_LOCK);
393 break;
394 case Opt_onerror_umount:
395 ufs_clear_opt (*mount_options, ONERROR);
396 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
397 break;
398 case Opt_onerror_repair:
399 printk("UFS-fs: Unable to do repair on error, "
400 "will lock lock instead\n");
401 ufs_clear_opt (*mount_options, ONERROR);
402 ufs_set_opt (*mount_options, ONERROR_REPAIR);
403 break;
404 default:
405 printk("UFS-fs: Invalid option: \"%s\" "
406 "or missing value\n", p);
407 return 0;
408 }
409 }
410 return 1;
411 }
412
413 /*
414 * Diffrent types of UFS hold fs_cstotal in different
415 * places, and use diffrent data structure for it.
416 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
417 */
418 static void ufs_setup_cstotal(struct super_block *sb)
419 {
420 struct ufs_sb_info *sbi = UFS_SB(sb);
421 struct ufs_sb_private_info *uspi = sbi->s_uspi;
422 struct ufs_super_block_first *usb1;
423 struct ufs_super_block_second *usb2;
424 struct ufs_super_block_third *usb3;
425 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
426
427 UFSD("ENTER, mtype=%u\n", mtype);
428 usb1 = ubh_get_usb_first(uspi);
429 usb2 = ubh_get_usb_second(uspi);
430 usb3 = ubh_get_usb_third(uspi);
431
432 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
433 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
434 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
435 /*we have statistic in different place, then usual*/
436 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
437 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
438 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
439 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
440 } else {
441 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
442 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
443 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
444 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
445 }
446 UFSD("EXIT\n");
447 }
448
449 /*
450 * Read on-disk structures associated with cylinder groups
451 */
452 static int ufs_read_cylinder_structures(struct super_block *sb)
453 {
454 struct ufs_sb_info *sbi = UFS_SB(sb);
455 struct ufs_sb_private_info *uspi = sbi->s_uspi;
456 struct ufs_buffer_head * ubh;
457 unsigned char * base, * space;
458 unsigned size, blks, i;
459 struct ufs_super_block_third *usb3;
460
461 UFSD("ENTER\n");
462
463 usb3 = ubh_get_usb_third(uspi);
464 /*
465 * Read cs structures from (usually) first data block
466 * on the device.
467 */
468 size = uspi->s_cssize;
469 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
470 base = space = kmalloc(size, GFP_KERNEL);
471 if (!base)
472 goto failed;
473 sbi->s_csp = (struct ufs_csum *)space;
474 for (i = 0; i < blks; i += uspi->s_fpb) {
475 size = uspi->s_bsize;
476 if (i + uspi->s_fpb > blks)
477 size = (blks - i) * uspi->s_fsize;
478
479 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
480
481 if (!ubh)
482 goto failed;
483
484 ubh_ubhcpymem (space, ubh, size);
485
486 space += size;
487 ubh_brelse (ubh);
488 ubh = NULL;
489 }
490
491 /*
492 * Read cylinder group (we read only first fragment from block
493 * at this time) and prepare internal data structures for cg caching.
494 */
495 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
496 goto failed;
497 for (i = 0; i < uspi->s_ncg; i++)
498 sbi->s_ucg[i] = NULL;
499 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
500 sbi->s_ucpi[i] = NULL;
501 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
502 }
503 for (i = 0; i < uspi->s_ncg; i++) {
504 UFSD("read cg %u\n", i);
505 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
506 goto failed;
507 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
508 goto failed;
509
510 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
511 }
512 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
513 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
514 goto failed;
515 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
516 }
517 sbi->s_cg_loaded = 0;
518 UFSD("EXIT\n");
519 return 1;
520
521 failed:
522 kfree (base);
523 if (sbi->s_ucg) {
524 for (i = 0; i < uspi->s_ncg; i++)
525 if (sbi->s_ucg[i])
526 brelse (sbi->s_ucg[i]);
527 kfree (sbi->s_ucg);
528 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
529 kfree (sbi->s_ucpi[i]);
530 }
531 UFSD("EXIT (FAILED)\n");
532 return 0;
533 }
534
535 /*
536 * Sync our internal copy of fs_cstotal with disk
537 */
538 static void ufs_put_cstotal(struct super_block *sb)
539 {
540 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
541 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
542 struct ufs_super_block_first *usb1;
543 struct ufs_super_block_second *usb2;
544 struct ufs_super_block_third *usb3;
545
546 UFSD("ENTER\n");
547 usb1 = ubh_get_usb_first(uspi);
548 usb2 = ubh_get_usb_second(uspi);
549 usb3 = ubh_get_usb_third(uspi);
550
551 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
552 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
553 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
554 /*we have statistic in different place, then usual*/
555 usb2->fs_un.fs_u2.cs_ndir =
556 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
557 usb2->fs_un.fs_u2.cs_nbfree =
558 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
559 usb3->fs_un1.fs_u2.cs_nifree =
560 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
561 usb3->fs_un1.fs_u2.cs_nffree =
562 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
563 } else {
564 usb1->fs_cstotal.cs_ndir =
565 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
566 usb1->fs_cstotal.cs_nbfree =
567 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
568 usb1->fs_cstotal.cs_nifree =
569 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
570 usb1->fs_cstotal.cs_nffree =
571 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
572 }
573 ubh_mark_buffer_dirty(USPI_UBH(uspi));
574 ufs_print_super_stuff(sb, usb1, usb2, usb3);
575 UFSD("EXIT\n");
576 }
577
578 /**
579 * ufs_put_super_internal() - put on-disk intrenal structures
580 * @sb: pointer to super_block structure
581 * Put on-disk structures associated with cylinder groups
582 * and write them back to disk, also update cs_total on disk
583 */
584 static void ufs_put_super_internal(struct super_block *sb)
585 {
586 struct ufs_sb_info *sbi = UFS_SB(sb);
587 struct ufs_sb_private_info *uspi = sbi->s_uspi;
588 struct ufs_buffer_head * ubh;
589 unsigned char * base, * space;
590 unsigned blks, size, i;
591
592
593 UFSD("ENTER\n");
594 ufs_put_cstotal(sb);
595 size = uspi->s_cssize;
596 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
597 base = space = (char*) sbi->s_csp;
598 for (i = 0; i < blks; i += uspi->s_fpb) {
599 size = uspi->s_bsize;
600 if (i + uspi->s_fpb > blks)
601 size = (blks - i) * uspi->s_fsize;
602
603 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
604
605 ubh_memcpyubh (ubh, space, size);
606 space += size;
607 ubh_mark_buffer_uptodate (ubh, 1);
608 ubh_mark_buffer_dirty (ubh);
609 ubh_brelse (ubh);
610 }
611 for (i = 0; i < sbi->s_cg_loaded; i++) {
612 ufs_put_cylinder (sb, i);
613 kfree (sbi->s_ucpi[i]);
614 }
615 for (; i < UFS_MAX_GROUP_LOADED; i++)
616 kfree (sbi->s_ucpi[i]);
617 for (i = 0; i < uspi->s_ncg; i++)
618 brelse (sbi->s_ucg[i]);
619 kfree (sbi->s_ucg);
620 kfree (base);
621 UFSD("EXIT\n");
622 }
623
624 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
625 {
626 struct ufs_sb_info * sbi;
627 struct ufs_sb_private_info * uspi;
628 struct ufs_super_block_first * usb1;
629 struct ufs_super_block_second * usb2;
630 struct ufs_super_block_third * usb3;
631 struct ufs_buffer_head * ubh;
632 struct inode *inode;
633 unsigned block_size, super_block_size;
634 unsigned flags;
635 unsigned super_block_offset;
636
637 uspi = NULL;
638 ubh = NULL;
639 flags = 0;
640
641 UFSD("ENTER\n");
642
643 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
644 if (!sbi)
645 goto failed_nomem;
646 sb->s_fs_info = sbi;
647
648 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
649
650 #ifndef CONFIG_UFS_FS_WRITE
651 if (!(sb->s_flags & MS_RDONLY)) {
652 printk("ufs was compiled with read-only support, "
653 "can't be mounted as read-write\n");
654 goto failed;
655 }
656 #endif
657 /*
658 * Set default mount options
659 * Parse mount options
660 */
661 sbi->s_mount_opt = 0;
662 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
663 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
664 printk("wrong mount options\n");
665 goto failed;
666 }
667 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
668 if (!silent)
669 printk("You didn't specify the type of your ufs filesystem\n\n"
670 "mount -t ufs -o ufstype="
671 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
672 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
673 "default is ufstype=old\n");
674 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
675 }
676
677 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
678 sbi->s_uspi = uspi;
679 if (!uspi)
680 goto failed;
681 uspi->s_dirblksize = UFS_SECTOR_SIZE;
682 super_block_offset=UFS_SBLOCK;
683
684 /* Keep 2Gig file limit. Some UFS variants need to override
685 this but as I don't know which I'll let those in the know loosen
686 the rules */
687 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
688 case UFS_MOUNT_UFSTYPE_44BSD:
689 UFSD("ufstype=44bsd\n");
690 uspi->s_fsize = block_size = 512;
691 uspi->s_fmask = ~(512 - 1);
692 uspi->s_fshift = 9;
693 uspi->s_sbsize = super_block_size = 1536;
694 uspi->s_sbbase = 0;
695 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
696 break;
697 case UFS_MOUNT_UFSTYPE_UFS2:
698 UFSD("ufstype=ufs2\n");
699 super_block_offset=SBLOCK_UFS2;
700 uspi->s_fsize = block_size = 512;
701 uspi->s_fmask = ~(512 - 1);
702 uspi->s_fshift = 9;
703 uspi->s_sbsize = super_block_size = 1536;
704 uspi->s_sbbase = 0;
705 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
706 break;
707
708 case UFS_MOUNT_UFSTYPE_SUN:
709 UFSD("ufstype=sun\n");
710 uspi->s_fsize = block_size = 1024;
711 uspi->s_fmask = ~(1024 - 1);
712 uspi->s_fshift = 10;
713 uspi->s_sbsize = super_block_size = 2048;
714 uspi->s_sbbase = 0;
715 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
716 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
717 break;
718
719 case UFS_MOUNT_UFSTYPE_SUNOS:
720 UFSD(("ufstype=sunos\n"))
721 uspi->s_fsize = block_size = 1024;
722 uspi->s_fmask = ~(1024 - 1);
723 uspi->s_fshift = 10;
724 uspi->s_sbsize = 2048;
725 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_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
729 break;
730
731 case UFS_MOUNT_UFSTYPE_SUNx86:
732 UFSD("ufstype=sunx86\n");
733 uspi->s_fsize = block_size = 1024;
734 uspi->s_fmask = ~(1024 - 1);
735 uspi->s_fshift = 10;
736 uspi->s_sbsize = super_block_size = 2048;
737 uspi->s_sbbase = 0;
738 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
739 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
740 break;
741
742 case UFS_MOUNT_UFSTYPE_OLD:
743 UFSD("ufstype=old\n");
744 uspi->s_fsize = block_size = 1024;
745 uspi->s_fmask = ~(1024 - 1);
746 uspi->s_fshift = 10;
747 uspi->s_sbsize = super_block_size = 2048;
748 uspi->s_sbbase = 0;
749 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
750 if (!(sb->s_flags & MS_RDONLY)) {
751 if (!silent)
752 printk(KERN_INFO "ufstype=old is supported read-only\n");
753 sb->s_flags |= MS_RDONLY;
754 }
755 break;
756
757 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
758 UFSD("ufstype=nextstep\n");
759 uspi->s_fsize = block_size = 1024;
760 uspi->s_fmask = ~(1024 - 1);
761 uspi->s_fshift = 10;
762 uspi->s_sbsize = super_block_size = 2048;
763 uspi->s_sbbase = 0;
764 uspi->s_dirblksize = 1024;
765 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
766 if (!(sb->s_flags & MS_RDONLY)) {
767 if (!silent)
768 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
769 sb->s_flags |= MS_RDONLY;
770 }
771 break;
772
773 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
774 UFSD("ufstype=nextstep-cd\n");
775 uspi->s_fsize = block_size = 2048;
776 uspi->s_fmask = ~(2048 - 1);
777 uspi->s_fshift = 11;
778 uspi->s_sbsize = super_block_size = 2048;
779 uspi->s_sbbase = 0;
780 uspi->s_dirblksize = 1024;
781 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
782 if (!(sb->s_flags & MS_RDONLY)) {
783 if (!silent)
784 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
785 sb->s_flags |= MS_RDONLY;
786 }
787 break;
788
789 case UFS_MOUNT_UFSTYPE_OPENSTEP:
790 UFSD("ufstype=openstep\n");
791 uspi->s_fsize = block_size = 1024;
792 uspi->s_fmask = ~(1024 - 1);
793 uspi->s_fshift = 10;
794 uspi->s_sbsize = super_block_size = 2048;
795 uspi->s_sbbase = 0;
796 uspi->s_dirblksize = 1024;
797 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
798 if (!(sb->s_flags & MS_RDONLY)) {
799 if (!silent)
800 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
801 sb->s_flags |= MS_RDONLY;
802 }
803 break;
804
805 case UFS_MOUNT_UFSTYPE_HP:
806 UFSD("ufstype=hp\n");
807 uspi->s_fsize = block_size = 1024;
808 uspi->s_fmask = ~(1024 - 1);
809 uspi->s_fshift = 10;
810 uspi->s_sbsize = super_block_size = 2048;
811 uspi->s_sbbase = 0;
812 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
813 if (!(sb->s_flags & MS_RDONLY)) {
814 if (!silent)
815 printk(KERN_INFO "ufstype=hp is supported read-only\n");
816 sb->s_flags |= MS_RDONLY;
817 }
818 break;
819 default:
820 if (!silent)
821 printk("unknown ufstype\n");
822 goto failed;
823 }
824
825 again:
826 if (!sb_set_blocksize(sb, block_size)) {
827 printk(KERN_ERR "UFS: failed to set blocksize\n");
828 goto failed;
829 }
830
831 /*
832 * read ufs super block from device
833 */
834
835 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
836
837 if (!ubh)
838 goto failed;
839
840 usb1 = ubh_get_usb_first(uspi);
841 usb2 = ubh_get_usb_second(uspi);
842 usb3 = ubh_get_usb_third(uspi);
843
844 /* Sort out mod used on SunOS 4.1.3 for fs_state */
845 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
846 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
847 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
848 flags &= ~UFS_ST_MASK;
849 flags |= UFS_ST_SUN;
850 }
851
852 /*
853 * Check ufs magic number
854 */
855 sbi->s_bytesex = BYTESEX_LE;
856 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
857 case UFS_MAGIC:
858 case UFS2_MAGIC:
859 case UFS_MAGIC_LFN:
860 case UFS_MAGIC_FEA:
861 case UFS_MAGIC_4GB:
862 goto magic_found;
863 }
864 sbi->s_bytesex = BYTESEX_BE;
865 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
866 case UFS_MAGIC:
867 case UFS2_MAGIC:
868 case UFS_MAGIC_LFN:
869 case UFS_MAGIC_FEA:
870 case UFS_MAGIC_4GB:
871 goto magic_found;
872 }
873
874 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
875 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
876 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
877 && uspi->s_sbbase < 256) {
878 ubh_brelse_uspi(uspi);
879 ubh = NULL;
880 uspi->s_sbbase += 8;
881 goto again;
882 }
883 if (!silent)
884 printk("ufs_read_super: bad magic number\n");
885 goto failed;
886
887 magic_found:
888 /*
889 * Check block and fragment sizes
890 */
891 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
892 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
893 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
894 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
895 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
896
897 if (!is_power_of_2(uspi->s_fsize)) {
898 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
899 uspi->s_fsize);
900 goto failed;
901 }
902 if (uspi->s_fsize < 512) {
903 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
904 uspi->s_fsize);
905 goto failed;
906 }
907 if (uspi->s_fsize > 4096) {
908 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
909 uspi->s_fsize);
910 goto failed;
911 }
912 if (!is_power_of_2(uspi->s_bsize)) {
913 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
914 uspi->s_bsize);
915 goto failed;
916 }
917 if (uspi->s_bsize < 4096) {
918 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
919 uspi->s_bsize);
920 goto failed;
921 }
922 if (uspi->s_bsize / uspi->s_fsize > 8) {
923 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
924 uspi->s_bsize / uspi->s_fsize);
925 goto failed;
926 }
927 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
928 ubh_brelse_uspi(uspi);
929 ubh = NULL;
930 block_size = uspi->s_fsize;
931 super_block_size = uspi->s_sbsize;
932 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
933 goto again;
934 }
935
936 sbi->s_flags = flags;/*after that line some functions use s_flags*/
937 ufs_print_super_stuff(sb, usb1, usb2, usb3);
938
939 /*
940 * Check, if file system was correctly unmounted.
941 * If not, make it read only.
942 */
943 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
944 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
945 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
946 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
947 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
948 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
949 switch(usb1->fs_clean) {
950 case UFS_FSCLEAN:
951 UFSD("fs is clean\n");
952 break;
953 case UFS_FSSTABLE:
954 UFSD("fs is stable\n");
955 break;
956 case UFS_FSOSF1:
957 UFSD("fs is DEC OSF/1\n");
958 break;
959 case UFS_FSACTIVE:
960 printk("ufs_read_super: fs is active\n");
961 sb->s_flags |= MS_RDONLY;
962 break;
963 case UFS_FSBAD:
964 printk("ufs_read_super: fs is bad\n");
965 sb->s_flags |= MS_RDONLY;
966 break;
967 default:
968 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
969 sb->s_flags |= MS_RDONLY;
970 break;
971 }
972 } else {
973 printk("ufs_read_super: fs needs fsck\n");
974 sb->s_flags |= MS_RDONLY;
975 }
976
977 /*
978 * Read ufs_super_block into internal data structures
979 */
980 sb->s_op = &ufs_super_ops;
981 sb->dq_op = NULL; /***/
982 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
983
984 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
985 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
986 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
987 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
988 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
989 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
990
991 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
992 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
993 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
994 } else {
995 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
996 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
997 }
998
999 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1000 /* s_bsize already set */
1001 /* s_fsize already set */
1002 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1003 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1004 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1005 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1006 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1007 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1008 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1009 uspi->s_fshift);
1010 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1011 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1012 /* s_sbsize already set */
1013 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1014 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1015 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1016 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1017 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1018 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1019 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1020 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1021
1022 if (uspi->fs_magic == UFS2_MAGIC)
1023 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1024 else
1025 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1026
1027 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1028 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1029 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1030 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1031 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1032 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1033 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1034 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1035 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1036 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1037 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1038 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1039 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1040 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1041
1042 /*
1043 * Compute another frequently used values
1044 */
1045 uspi->s_fpbmask = uspi->s_fpb - 1;
1046 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1047 uspi->s_apbshift = uspi->s_bshift - 3;
1048 else
1049 uspi->s_apbshift = uspi->s_bshift - 2;
1050
1051 uspi->s_2apbshift = uspi->s_apbshift * 2;
1052 uspi->s_3apbshift = uspi->s_apbshift * 3;
1053 uspi->s_apb = 1 << uspi->s_apbshift;
1054 uspi->s_2apb = 1 << uspi->s_2apbshift;
1055 uspi->s_3apb = 1 << uspi->s_3apbshift;
1056 uspi->s_apbmask = uspi->s_apb - 1;
1057 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1058 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1059 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1060 uspi->s_bpf = uspi->s_fsize << 3;
1061 uspi->s_bpfshift = uspi->s_fshift + 3;
1062 uspi->s_bpfmask = uspi->s_bpf - 1;
1063 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1064 UFS_MOUNT_UFSTYPE_44BSD)
1065 uspi->s_maxsymlinklen =
1066 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1067
1068 inode = iget(sb, UFS_ROOTINO);
1069 if (!inode || is_bad_inode(inode))
1070 goto failed;
1071 sb->s_root = d_alloc_root(inode);
1072 if (!sb->s_root)
1073 goto dalloc_failed;
1074
1075 ufs_setup_cstotal(sb);
1076 /*
1077 * Read cylinder group structures
1078 */
1079 if (!(sb->s_flags & MS_RDONLY))
1080 if (!ufs_read_cylinder_structures(sb))
1081 goto failed;
1082
1083 UFSD("EXIT\n");
1084 return 0;
1085
1086 dalloc_failed:
1087 iput(inode);
1088 failed:
1089 if (ubh)
1090 ubh_brelse_uspi (uspi);
1091 kfree (uspi);
1092 kfree(sbi);
1093 sb->s_fs_info = NULL;
1094 UFSD("EXIT (FAILED)\n");
1095 return -EINVAL;
1096
1097 failed_nomem:
1098 UFSD("EXIT (NOMEM)\n");
1099 return -ENOMEM;
1100 }
1101
1102 static void ufs_write_super(struct super_block *sb)
1103 {
1104 struct ufs_sb_private_info * uspi;
1105 struct ufs_super_block_first * usb1;
1106 struct ufs_super_block_third * usb3;
1107 unsigned flags;
1108
1109 lock_kernel();
1110 UFSD("ENTER\n");
1111 flags = UFS_SB(sb)->s_flags;
1112 uspi = UFS_SB(sb)->s_uspi;
1113 usb1 = ubh_get_usb_first(uspi);
1114 usb3 = ubh_get_usb_third(uspi);
1115
1116 if (!(sb->s_flags & MS_RDONLY)) {
1117 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1118 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1119 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1120 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1121 ufs_set_fs_state(sb, usb1, usb3,
1122 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1123 ufs_put_cstotal(sb);
1124 }
1125 sb->s_dirt = 0;
1126 UFSD("EXIT\n");
1127 unlock_kernel();
1128 }
1129
1130 static void ufs_put_super(struct super_block *sb)
1131 {
1132 struct ufs_sb_info * sbi = UFS_SB(sb);
1133
1134 UFSD("ENTER\n");
1135
1136 if (!(sb->s_flags & MS_RDONLY))
1137 ufs_put_super_internal(sb);
1138
1139 ubh_brelse_uspi (sbi->s_uspi);
1140 kfree (sbi->s_uspi);
1141 kfree (sbi);
1142 sb->s_fs_info = NULL;
1143 UFSD("EXIT\n");
1144 return;
1145 }
1146
1147
1148 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1149 {
1150 struct ufs_sb_private_info * uspi;
1151 struct ufs_super_block_first * usb1;
1152 struct ufs_super_block_third * usb3;
1153 unsigned new_mount_opt, ufstype;
1154 unsigned flags;
1155
1156 uspi = UFS_SB(sb)->s_uspi;
1157 flags = UFS_SB(sb)->s_flags;
1158 usb1 = ubh_get_usb_first(uspi);
1159 usb3 = ubh_get_usb_third(uspi);
1160
1161 /*
1162 * Allow the "check" option to be passed as a remount option.
1163 * It is not possible to change ufstype option during remount
1164 */
1165 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1166 new_mount_opt = 0;
1167 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1168 if (!ufs_parse_options (data, &new_mount_opt))
1169 return -EINVAL;
1170 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1171 new_mount_opt |= ufstype;
1172 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1173 printk("ufstype can't be changed during remount\n");
1174 return -EINVAL;
1175 }
1176
1177 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1178 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1179 return 0;
1180 }
1181
1182 /*
1183 * fs was mouted as rw, remounting ro
1184 */
1185 if (*mount_flags & MS_RDONLY) {
1186 ufs_put_super_internal(sb);
1187 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1188 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1189 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1190 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1191 ufs_set_fs_state(sb, usb1, usb3,
1192 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1193 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1194 sb->s_dirt = 0;
1195 sb->s_flags |= MS_RDONLY;
1196 } else {
1197 /*
1198 * fs was mounted as ro, remounting rw
1199 */
1200 #ifndef CONFIG_UFS_FS_WRITE
1201 printk("ufs was compiled with read-only support, "
1202 "can't be mounted as read-write\n");
1203 return -EINVAL;
1204 #else
1205 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1206 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1207 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1208 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1209 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1210 printk("this ufstype is read-only supported\n");
1211 return -EINVAL;
1212 }
1213 if (!ufs_read_cylinder_structures(sb)) {
1214 printk("failed during remounting\n");
1215 return -EPERM;
1216 }
1217 sb->s_flags &= ~MS_RDONLY;
1218 #endif
1219 }
1220 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1221 return 0;
1222 }
1223
1224 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1225 {
1226 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1227 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1228 struct match_token *tp = tokens;
1229
1230 while (tp->token != Opt_onerror_panic && tp->token != mval)
1231 ++tp;
1232 BUG_ON(tp->token == Opt_onerror_panic);
1233 seq_printf(seq, ",%s", tp->pattern);
1234
1235 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1236 while (tp->token != Opt_err && tp->token != mval)
1237 ++tp;
1238 BUG_ON(tp->token == Opt_err);
1239 seq_printf(seq, ",%s", tp->pattern);
1240
1241 return 0;
1242 }
1243
1244 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1245 {
1246 struct super_block *sb = dentry->d_sb;
1247 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1248 unsigned flags = UFS_SB(sb)->s_flags;
1249 struct ufs_super_block_first *usb1;
1250 struct ufs_super_block_second *usb2;
1251 struct ufs_super_block_third *usb3;
1252
1253 lock_kernel();
1254
1255 usb1 = ubh_get_usb_first(uspi);
1256 usb2 = ubh_get_usb_second(uspi);
1257 usb3 = ubh_get_usb_third(uspi);
1258
1259 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1260 buf->f_type = UFS2_MAGIC;
1261 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1262 } else {
1263 buf->f_type = UFS_MAGIC;
1264 buf->f_blocks = uspi->s_dsize;
1265 }
1266 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1267 uspi->cs_total.cs_nffree;
1268 buf->f_ffree = uspi->cs_total.cs_nifree;
1269 buf->f_bsize = sb->s_blocksize;
1270 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1271 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1272 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1273 buf->f_namelen = UFS_MAXNAMLEN;
1274
1275 unlock_kernel();
1276
1277 return 0;
1278 }
1279
1280 static struct kmem_cache * ufs_inode_cachep;
1281
1282 static struct inode *ufs_alloc_inode(struct super_block *sb)
1283 {
1284 struct ufs_inode_info *ei;
1285 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1286 if (!ei)
1287 return NULL;
1288 ei->vfs_inode.i_version = 1;
1289 return &ei->vfs_inode;
1290 }
1291
1292 static void ufs_destroy_inode(struct inode *inode)
1293 {
1294 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1295 }
1296
1297 static void init_once(struct kmem_cache * cachep, void *foo)
1298 {
1299 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1300
1301 inode_init_once(&ei->vfs_inode);
1302 }
1303
1304 static int init_inodecache(void)
1305 {
1306 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1307 sizeof(struct ufs_inode_info),
1308 0, (SLAB_RECLAIM_ACCOUNT|
1309 SLAB_MEM_SPREAD),
1310 init_once);
1311 if (ufs_inode_cachep == NULL)
1312 return -ENOMEM;
1313 return 0;
1314 }
1315
1316 static void destroy_inodecache(void)
1317 {
1318 kmem_cache_destroy(ufs_inode_cachep);
1319 }
1320
1321 #ifdef CONFIG_QUOTA
1322 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1323 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1324 #endif
1325
1326 static const struct super_operations ufs_super_ops = {
1327 .alloc_inode = ufs_alloc_inode,
1328 .destroy_inode = ufs_destroy_inode,
1329 .read_inode = ufs_read_inode,
1330 .write_inode = ufs_write_inode,
1331 .delete_inode = ufs_delete_inode,
1332 .put_super = ufs_put_super,
1333 .write_super = ufs_write_super,
1334 .statfs = ufs_statfs,
1335 .remount_fs = ufs_remount,
1336 .show_options = ufs_show_options,
1337 #ifdef CONFIG_QUOTA
1338 .quota_read = ufs_quota_read,
1339 .quota_write = ufs_quota_write,
1340 #endif
1341 };
1342
1343 #ifdef CONFIG_QUOTA
1344
1345 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1346 * acquiring the locks... As quota files are never truncated and quota code
1347 * itself serializes the operations (and noone else should touch the files)
1348 * we don't have to be afraid of races */
1349 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1350 size_t len, loff_t off)
1351 {
1352 struct inode *inode = sb_dqopt(sb)->files[type];
1353 sector_t blk = off >> sb->s_blocksize_bits;
1354 int err = 0;
1355 int offset = off & (sb->s_blocksize - 1);
1356 int tocopy;
1357 size_t toread;
1358 struct buffer_head *bh;
1359 loff_t i_size = i_size_read(inode);
1360
1361 if (off > i_size)
1362 return 0;
1363 if (off+len > i_size)
1364 len = i_size-off;
1365 toread = len;
1366 while (toread > 0) {
1367 tocopy = sb->s_blocksize - offset < toread ?
1368 sb->s_blocksize - offset : toread;
1369
1370 bh = ufs_bread(inode, blk, 0, &err);
1371 if (err)
1372 return err;
1373 if (!bh) /* A hole? */
1374 memset(data, 0, tocopy);
1375 else {
1376 memcpy(data, bh->b_data+offset, tocopy);
1377 brelse(bh);
1378 }
1379 offset = 0;
1380 toread -= tocopy;
1381 data += tocopy;
1382 blk++;
1383 }
1384 return len;
1385 }
1386
1387 /* Write to quotafile */
1388 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1389 const char *data, size_t len, loff_t off)
1390 {
1391 struct inode *inode = sb_dqopt(sb)->files[type];
1392 sector_t blk = off >> sb->s_blocksize_bits;
1393 int err = 0;
1394 int offset = off & (sb->s_blocksize - 1);
1395 int tocopy;
1396 size_t towrite = len;
1397 struct buffer_head *bh;
1398
1399 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1400 while (towrite > 0) {
1401 tocopy = sb->s_blocksize - offset < towrite ?
1402 sb->s_blocksize - offset : towrite;
1403
1404 bh = ufs_bread(inode, blk, 1, &err);
1405 if (!bh)
1406 goto out;
1407 lock_buffer(bh);
1408 memcpy(bh->b_data+offset, data, tocopy);
1409 flush_dcache_page(bh->b_page);
1410 set_buffer_uptodate(bh);
1411 mark_buffer_dirty(bh);
1412 unlock_buffer(bh);
1413 brelse(bh);
1414 offset = 0;
1415 towrite -= tocopy;
1416 data += tocopy;
1417 blk++;
1418 }
1419 out:
1420 if (len == towrite) {
1421 mutex_unlock(&inode->i_mutex);
1422 return err;
1423 }
1424 if (inode->i_size < off+len-towrite)
1425 i_size_write(inode, off+len-towrite);
1426 inode->i_version++;
1427 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1428 mark_inode_dirty(inode);
1429 mutex_unlock(&inode->i_mutex);
1430 return len - towrite;
1431 }
1432
1433 #endif
1434
1435 static int ufs_get_sb(struct file_system_type *fs_type,
1436 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1437 {
1438 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1439 }
1440
1441 static struct file_system_type ufs_fs_type = {
1442 .owner = THIS_MODULE,
1443 .name = "ufs",
1444 .get_sb = ufs_get_sb,
1445 .kill_sb = kill_block_super,
1446 .fs_flags = FS_REQUIRES_DEV,
1447 };
1448
1449 static int __init init_ufs_fs(void)
1450 {
1451 int err = init_inodecache();
1452 if (err)
1453 goto out1;
1454 err = register_filesystem(&ufs_fs_type);
1455 if (err)
1456 goto out;
1457 return 0;
1458 out:
1459 destroy_inodecache();
1460 out1:
1461 return err;
1462 }
1463
1464 static void __exit exit_ufs_fs(void)
1465 {
1466 unregister_filesystem(&ufs_fs_type);
1467 destroy_inodecache();
1468 }
1469
1470 module_init(init_ufs_fs)
1471 module_exit(exit_ufs_fs)
1472 MODULE_LICENSE("GPL");
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