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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
[linux-2.6/mini2440.git] / fs / ufs / super.c
blob60359291761f2eb2a8229f053b1d5763c19115c6
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 uspi = UFS_SB(sb)->s_uspi;
267 usb1 = ubh_get_usb_first(uspi);
268
269 if (!(sb->s_flags & MS_RDONLY)) {
270 usb1->fs_clean = UFS_FSBAD;
271 ubh_mark_buffer_dirty(USPI_UBH(uspi));
272 sb->s_dirt = 1;
273 }
274 va_start (args, fmt);
275 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
276 va_end (args);
277 sb->s_flags |= MS_RDONLY;
278 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
279 sb->s_id, function, error_buf);
280 }
281
282 void ufs_warning (struct super_block * sb, const char * function,
283 const char * fmt, ...)
284 {
285 va_list args;
286
287 va_start (args, fmt);
288 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
289 va_end (args);
290 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
291 sb->s_id, function, error_buf);
292 }
293
294 enum {
295 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
296 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
297 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
298 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
299 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
300 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
301 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
302 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
303 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
304 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
305 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
306 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
307 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
308 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
309 Opt_err
310 };
311
312 static const match_table_t tokens = {
313 {Opt_type_old, "ufstype=old"},
314 {Opt_type_sunx86, "ufstype=sunx86"},
315 {Opt_type_sun, "ufstype=sun"},
316 {Opt_type_sunos, "ufstype=sunos"},
317 {Opt_type_44bsd, "ufstype=44bsd"},
318 {Opt_type_ufs2, "ufstype=ufs2"},
319 {Opt_type_ufs2, "ufstype=5xbsd"},
320 {Opt_type_hp, "ufstype=hp"},
321 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
322 {Opt_type_nextstep, "ufstype=nextstep"},
323 {Opt_type_openstep, "ufstype=openstep"},
324 /*end of possible ufs types */
325 {Opt_onerror_panic, "onerror=panic"},
326 {Opt_onerror_lock, "onerror=lock"},
327 {Opt_onerror_umount, "onerror=umount"},
328 {Opt_onerror_repair, "onerror=repair"},
329 {Opt_err, NULL}
330 };
331
332 static int ufs_parse_options (char * options, unsigned * mount_options)
333 {
334 char * p;
335
336 UFSD("ENTER\n");
337
338 if (!options)
339 return 1;
340
341 while ((p = strsep(&options, ",")) != NULL) {
342 substring_t args[MAX_OPT_ARGS];
343 int token;
344 if (!*p)
345 continue;
346
347 token = match_token(p, tokens, args);
348 switch (token) {
349 case Opt_type_old:
350 ufs_clear_opt (*mount_options, UFSTYPE);
351 ufs_set_opt (*mount_options, UFSTYPE_OLD);
352 break;
353 case Opt_type_sunx86:
354 ufs_clear_opt (*mount_options, UFSTYPE);
355 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
356 break;
357 case Opt_type_sun:
358 ufs_clear_opt (*mount_options, UFSTYPE);
359 ufs_set_opt (*mount_options, UFSTYPE_SUN);
360 break;
361 case Opt_type_sunos:
362 ufs_clear_opt(*mount_options, UFSTYPE);
363 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
364 break;
365 case Opt_type_44bsd:
366 ufs_clear_opt (*mount_options, UFSTYPE);
367 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
368 break;
369 case Opt_type_ufs2:
370 ufs_clear_opt(*mount_options, UFSTYPE);
371 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
372 break;
373 case Opt_type_hp:
374 ufs_clear_opt (*mount_options, UFSTYPE);
375 ufs_set_opt (*mount_options, UFSTYPE_HP);
376 break;
377 case Opt_type_nextstepcd:
378 ufs_clear_opt (*mount_options, UFSTYPE);
379 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
380 break;
381 case Opt_type_nextstep:
382 ufs_clear_opt (*mount_options, UFSTYPE);
383 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
384 break;
385 case Opt_type_openstep:
386 ufs_clear_opt (*mount_options, UFSTYPE);
387 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
388 break;
389 case Opt_onerror_panic:
390 ufs_clear_opt (*mount_options, ONERROR);
391 ufs_set_opt (*mount_options, ONERROR_PANIC);
392 break;
393 case Opt_onerror_lock:
394 ufs_clear_opt (*mount_options, ONERROR);
395 ufs_set_opt (*mount_options, ONERROR_LOCK);
396 break;
397 case Opt_onerror_umount:
398 ufs_clear_opt (*mount_options, ONERROR);
399 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
400 break;
401 case Opt_onerror_repair:
402 printk("UFS-fs: Unable to do repair on error, "
403 "will lock lock instead\n");
404 ufs_clear_opt (*mount_options, ONERROR);
405 ufs_set_opt (*mount_options, ONERROR_REPAIR);
406 break;
407 default:
408 printk("UFS-fs: Invalid option: \"%s\" "
409 "or missing value\n", p);
410 return 0;
411 }
412 }
413 return 1;
414 }
415
416 /*
417 * Diffrent types of UFS hold fs_cstotal in different
418 * places, and use diffrent data structure for it.
419 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
420 */
421 static void ufs_setup_cstotal(struct super_block *sb)
422 {
423 struct ufs_sb_info *sbi = UFS_SB(sb);
424 struct ufs_sb_private_info *uspi = sbi->s_uspi;
425 struct ufs_super_block_first *usb1;
426 struct ufs_super_block_second *usb2;
427 struct ufs_super_block_third *usb3;
428 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
429
430 UFSD("ENTER, mtype=%u\n", mtype);
431 usb1 = ubh_get_usb_first(uspi);
432 usb2 = ubh_get_usb_second(uspi);
433 usb3 = ubh_get_usb_third(uspi);
434
435 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
436 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
437 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
438 /*we have statistic in different place, then usual*/
439 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
440 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
441 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
442 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
443 } else {
444 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
445 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
446 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
447 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
448 }
449 UFSD("EXIT\n");
450 }
451
452 /*
453 * Read on-disk structures associated with cylinder groups
454 */
455 static int ufs_read_cylinder_structures(struct super_block *sb)
456 {
457 struct ufs_sb_info *sbi = UFS_SB(sb);
458 struct ufs_sb_private_info *uspi = sbi->s_uspi;
459 struct ufs_buffer_head * ubh;
460 unsigned char * base, * space;
461 unsigned size, blks, i;
462 struct ufs_super_block_third *usb3;
463
464 UFSD("ENTER\n");
465
466 usb3 = ubh_get_usb_third(uspi);
467 /*
468 * Read cs structures from (usually) first data block
469 * on the device.
470 */
471 size = uspi->s_cssize;
472 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
473 base = space = kmalloc(size, GFP_KERNEL);
474 if (!base)
475 goto failed;
476 sbi->s_csp = (struct ufs_csum *)space;
477 for (i = 0; i < blks; i += uspi->s_fpb) {
478 size = uspi->s_bsize;
479 if (i + uspi->s_fpb > blks)
480 size = (blks - i) * uspi->s_fsize;
481
482 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
483
484 if (!ubh)
485 goto failed;
486
487 ubh_ubhcpymem (space, ubh, size);
488
489 space += size;
490 ubh_brelse (ubh);
491 ubh = NULL;
492 }
493
494 /*
495 * Read cylinder group (we read only first fragment from block
496 * at this time) and prepare internal data structures for cg caching.
497 */
498 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
499 goto failed;
500 for (i = 0; i < uspi->s_ncg; i++)
501 sbi->s_ucg[i] = NULL;
502 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
503 sbi->s_ucpi[i] = NULL;
504 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
505 }
506 for (i = 0; i < uspi->s_ncg; i++) {
507 UFSD("read cg %u\n", i);
508 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
509 goto failed;
510 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
511 goto failed;
512
513 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
514 }
515 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
516 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
517 goto failed;
518 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
519 }
520 sbi->s_cg_loaded = 0;
521 UFSD("EXIT\n");
522 return 1;
523
524 failed:
525 kfree (base);
526 if (sbi->s_ucg) {
527 for (i = 0; i < uspi->s_ncg; i++)
528 if (sbi->s_ucg[i])
529 brelse (sbi->s_ucg[i]);
530 kfree (sbi->s_ucg);
531 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
532 kfree (sbi->s_ucpi[i]);
533 }
534 UFSD("EXIT (FAILED)\n");
535 return 0;
536 }
537
538 /*
539 * Sync our internal copy of fs_cstotal with disk
540 */
541 static void ufs_put_cstotal(struct super_block *sb)
542 {
543 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
544 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
545 struct ufs_super_block_first *usb1;
546 struct ufs_super_block_second *usb2;
547 struct ufs_super_block_third *usb3;
548
549 UFSD("ENTER\n");
550 usb1 = ubh_get_usb_first(uspi);
551 usb2 = ubh_get_usb_second(uspi);
552 usb3 = ubh_get_usb_third(uspi);
553
554 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
555 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
556 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
557 /*we have statistic in different place, then usual*/
558 usb2->fs_un.fs_u2.cs_ndir =
559 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
560 usb2->fs_un.fs_u2.cs_nbfree =
561 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
562 usb3->fs_un1.fs_u2.cs_nifree =
563 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
564 usb3->fs_un1.fs_u2.cs_nffree =
565 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
566 } else {
567 usb1->fs_cstotal.cs_ndir =
568 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
569 usb1->fs_cstotal.cs_nbfree =
570 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
571 usb1->fs_cstotal.cs_nifree =
572 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
573 usb1->fs_cstotal.cs_nffree =
574 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
575 }
576 ubh_mark_buffer_dirty(USPI_UBH(uspi));
577 ufs_print_super_stuff(sb, usb1, usb2, usb3);
578 UFSD("EXIT\n");
579 }
580
581 /**
582 * ufs_put_super_internal() - put on-disk intrenal structures
583 * @sb: pointer to super_block structure
584 * Put on-disk structures associated with cylinder groups
585 * and write them back to disk, also update cs_total on disk
586 */
587 static void ufs_put_super_internal(struct super_block *sb)
588 {
589 struct ufs_sb_info *sbi = UFS_SB(sb);
590 struct ufs_sb_private_info *uspi = sbi->s_uspi;
591 struct ufs_buffer_head * ubh;
592 unsigned char * base, * space;
593 unsigned blks, size, i;
594
595
596 UFSD("ENTER\n");
597 ufs_put_cstotal(sb);
598 size = uspi->s_cssize;
599 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
600 base = space = (char*) sbi->s_csp;
601 for (i = 0; i < blks; i += uspi->s_fpb) {
602 size = uspi->s_bsize;
603 if (i + uspi->s_fpb > blks)
604 size = (blks - i) * uspi->s_fsize;
605
606 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
607
608 ubh_memcpyubh (ubh, space, size);
609 space += size;
610 ubh_mark_buffer_uptodate (ubh, 1);
611 ubh_mark_buffer_dirty (ubh);
612 ubh_brelse (ubh);
613 }
614 for (i = 0; i < sbi->s_cg_loaded; i++) {
615 ufs_put_cylinder (sb, i);
616 kfree (sbi->s_ucpi[i]);
617 }
618 for (; i < UFS_MAX_GROUP_LOADED; i++)
619 kfree (sbi->s_ucpi[i]);
620 for (i = 0; i < uspi->s_ncg; i++)
621 brelse (sbi->s_ucg[i]);
622 kfree (sbi->s_ucg);
623 kfree (base);
624 UFSD("EXIT\n");
625 }
626
627 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
628 {
629 struct ufs_sb_info * sbi;
630 struct ufs_sb_private_info * uspi;
631 struct ufs_super_block_first * usb1;
632 struct ufs_super_block_second * usb2;
633 struct ufs_super_block_third * usb3;
634 struct ufs_buffer_head * ubh;
635 struct inode *inode;
636 unsigned block_size, super_block_size;
637 unsigned flags;
638 unsigned super_block_offset;
639 unsigned maxsymlen;
640 int ret = -EINVAL;
641
642 uspi = NULL;
643 ubh = NULL;
644 flags = 0;
645
646 UFSD("ENTER\n");
647
648 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
649 if (!sbi)
650 goto failed_nomem;
651 sb->s_fs_info = sbi;
652
653 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
654
655 #ifndef CONFIG_UFS_FS_WRITE
656 if (!(sb->s_flags & MS_RDONLY)) {
657 printk("ufs was compiled with read-only support, "
658 "can't be mounted as read-write\n");
659 goto failed;
660 }
661 #endif
662 /*
663 * Set default mount options
664 * Parse mount options
665 */
666 sbi->s_mount_opt = 0;
667 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
668 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
669 printk("wrong mount options\n");
670 goto failed;
671 }
672 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
673 if (!silent)
674 printk("You didn't specify the type of your ufs filesystem\n\n"
675 "mount -t ufs -o ufstype="
676 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
677 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
678 "default is ufstype=old\n");
679 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
680 }
681
682 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
683 sbi->s_uspi = uspi;
684 if (!uspi)
685 goto failed;
686 uspi->s_dirblksize = UFS_SECTOR_SIZE;
687 super_block_offset=UFS_SBLOCK;
688
689 /* Keep 2Gig file limit. Some UFS variants need to override
690 this but as I don't know which I'll let those in the know loosen
691 the rules */
692 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
693 case UFS_MOUNT_UFSTYPE_44BSD:
694 UFSD("ufstype=44bsd\n");
695 uspi->s_fsize = block_size = 512;
696 uspi->s_fmask = ~(512 - 1);
697 uspi->s_fshift = 9;
698 uspi->s_sbsize = super_block_size = 1536;
699 uspi->s_sbbase = 0;
700 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
701 break;
702 case UFS_MOUNT_UFSTYPE_UFS2:
703 UFSD("ufstype=ufs2\n");
704 super_block_offset=SBLOCK_UFS2;
705 uspi->s_fsize = block_size = 512;
706 uspi->s_fmask = ~(512 - 1);
707 uspi->s_fshift = 9;
708 uspi->s_sbsize = super_block_size = 1536;
709 uspi->s_sbbase = 0;
710 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
711 break;
712
713 case UFS_MOUNT_UFSTYPE_SUN:
714 UFSD("ufstype=sun\n");
715 uspi->s_fsize = block_size = 1024;
716 uspi->s_fmask = ~(1024 - 1);
717 uspi->s_fshift = 10;
718 uspi->s_sbsize = super_block_size = 2048;
719 uspi->s_sbbase = 0;
720 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
721 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
722 break;
723
724 case UFS_MOUNT_UFSTYPE_SUNOS:
725 UFSD(("ufstype=sunos\n"))
726 uspi->s_fsize = block_size = 1024;
727 uspi->s_fmask = ~(1024 - 1);
728 uspi->s_fshift = 10;
729 uspi->s_sbsize = 2048;
730 super_block_size = 2048;
731 uspi->s_sbbase = 0;
732 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
733 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
734 break;
735
736 case UFS_MOUNT_UFSTYPE_SUNx86:
737 UFSD("ufstype=sunx86\n");
738 uspi->s_fsize = block_size = 1024;
739 uspi->s_fmask = ~(1024 - 1);
740 uspi->s_fshift = 10;
741 uspi->s_sbsize = super_block_size = 2048;
742 uspi->s_sbbase = 0;
743 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
744 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
745 break;
746
747 case UFS_MOUNT_UFSTYPE_OLD:
748 UFSD("ufstype=old\n");
749 uspi->s_fsize = block_size = 1024;
750 uspi->s_fmask = ~(1024 - 1);
751 uspi->s_fshift = 10;
752 uspi->s_sbsize = super_block_size = 2048;
753 uspi->s_sbbase = 0;
754 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
755 if (!(sb->s_flags & MS_RDONLY)) {
756 if (!silent)
757 printk(KERN_INFO "ufstype=old is supported read-only\n");
758 sb->s_flags |= MS_RDONLY;
759 }
760 break;
761
762 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
763 UFSD("ufstype=nextstep\n");
764 uspi->s_fsize = block_size = 1024;
765 uspi->s_fmask = ~(1024 - 1);
766 uspi->s_fshift = 10;
767 uspi->s_sbsize = super_block_size = 2048;
768 uspi->s_sbbase = 0;
769 uspi->s_dirblksize = 1024;
770 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
771 if (!(sb->s_flags & MS_RDONLY)) {
772 if (!silent)
773 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
774 sb->s_flags |= MS_RDONLY;
775 }
776 break;
777
778 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
779 UFSD("ufstype=nextstep-cd\n");
780 uspi->s_fsize = block_size = 2048;
781 uspi->s_fmask = ~(2048 - 1);
782 uspi->s_fshift = 11;
783 uspi->s_sbsize = super_block_size = 2048;
784 uspi->s_sbbase = 0;
785 uspi->s_dirblksize = 1024;
786 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
787 if (!(sb->s_flags & MS_RDONLY)) {
788 if (!silent)
789 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
790 sb->s_flags |= MS_RDONLY;
791 }
792 break;
793
794 case UFS_MOUNT_UFSTYPE_OPENSTEP:
795 UFSD("ufstype=openstep\n");
796 uspi->s_fsize = block_size = 1024;
797 uspi->s_fmask = ~(1024 - 1);
798 uspi->s_fshift = 10;
799 uspi->s_sbsize = super_block_size = 2048;
800 uspi->s_sbbase = 0;
801 uspi->s_dirblksize = 1024;
802 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
803 if (!(sb->s_flags & MS_RDONLY)) {
804 if (!silent)
805 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
806 sb->s_flags |= MS_RDONLY;
807 }
808 break;
809
810 case UFS_MOUNT_UFSTYPE_HP:
811 UFSD("ufstype=hp\n");
812 uspi->s_fsize = block_size = 1024;
813 uspi->s_fmask = ~(1024 - 1);
814 uspi->s_fshift = 10;
815 uspi->s_sbsize = super_block_size = 2048;
816 uspi->s_sbbase = 0;
817 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
818 if (!(sb->s_flags & MS_RDONLY)) {
819 if (!silent)
820 printk(KERN_INFO "ufstype=hp is supported read-only\n");
821 sb->s_flags |= MS_RDONLY;
822 }
823 break;
824 default:
825 if (!silent)
826 printk("unknown ufstype\n");
827 goto failed;
828 }
829
830 again:
831 if (!sb_set_blocksize(sb, block_size)) {
832 printk(KERN_ERR "UFS: failed to set blocksize\n");
833 goto failed;
834 }
835
836 /*
837 * read ufs super block from device
838 */
839
840 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
841
842 if (!ubh)
843 goto failed;
844
845 usb1 = ubh_get_usb_first(uspi);
846 usb2 = ubh_get_usb_second(uspi);
847 usb3 = ubh_get_usb_third(uspi);
848
849 /* Sort out mod used on SunOS 4.1.3 for fs_state */
850 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
851 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
852 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
853 flags &= ~UFS_ST_MASK;
854 flags |= UFS_ST_SUN;
855 }
856
857 /*
858 * Check ufs magic number
859 */
860 sbi->s_bytesex = BYTESEX_LE;
861 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
862 case UFS_MAGIC:
863 case UFS2_MAGIC:
864 case UFS_MAGIC_LFN:
865 case UFS_MAGIC_FEA:
866 case UFS_MAGIC_4GB:
867 goto magic_found;
868 }
869 sbi->s_bytesex = BYTESEX_BE;
870 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
871 case UFS_MAGIC:
872 case UFS2_MAGIC:
873 case UFS_MAGIC_LFN:
874 case UFS_MAGIC_FEA:
875 case UFS_MAGIC_4GB:
876 goto magic_found;
877 }
878
879 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
880 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
881 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
882 && uspi->s_sbbase < 256) {
883 ubh_brelse_uspi(uspi);
884 ubh = NULL;
885 uspi->s_sbbase += 8;
886 goto again;
887 }
888 if (!silent)
889 printk("ufs_read_super: bad magic number\n");
890 goto failed;
891
892 magic_found:
893 /*
894 * Check block and fragment sizes
895 */
896 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
897 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
898 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
899 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
900 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
901
902 if (!is_power_of_2(uspi->s_fsize)) {
903 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
904 uspi->s_fsize);
905 goto failed;
906 }
907 if (uspi->s_fsize < 512) {
908 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
909 uspi->s_fsize);
910 goto failed;
911 }
912 if (uspi->s_fsize > 4096) {
913 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
914 uspi->s_fsize);
915 goto failed;
916 }
917 if (!is_power_of_2(uspi->s_bsize)) {
918 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
919 uspi->s_bsize);
920 goto failed;
921 }
922 if (uspi->s_bsize < 4096) {
923 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
924 uspi->s_bsize);
925 goto failed;
926 }
927 if (uspi->s_bsize / uspi->s_fsize > 8) {
928 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
929 uspi->s_bsize / uspi->s_fsize);
930 goto failed;
931 }
932 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
933 ubh_brelse_uspi(uspi);
934 ubh = NULL;
935 block_size = uspi->s_fsize;
936 super_block_size = uspi->s_sbsize;
937 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
938 goto again;
939 }
940
941 sbi->s_flags = flags;/*after that line some functions use s_flags*/
942 ufs_print_super_stuff(sb, usb1, usb2, usb3);
943
944 /*
945 * Check, if file system was correctly unmounted.
946 * If not, make it read only.
947 */
948 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
949 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
950 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
951 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
952 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
953 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
954 switch(usb1->fs_clean) {
955 case UFS_FSCLEAN:
956 UFSD("fs is clean\n");
957 break;
958 case UFS_FSSTABLE:
959 UFSD("fs is stable\n");
960 break;
961 case UFS_FSOSF1:
962 UFSD("fs is DEC OSF/1\n");
963 break;
964 case UFS_FSACTIVE:
965 printk("ufs_read_super: fs is active\n");
966 sb->s_flags |= MS_RDONLY;
967 break;
968 case UFS_FSBAD:
969 printk("ufs_read_super: fs is bad\n");
970 sb->s_flags |= MS_RDONLY;
971 break;
972 default:
973 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
974 sb->s_flags |= MS_RDONLY;
975 break;
976 }
977 } else {
978 printk("ufs_read_super: fs needs fsck\n");
979 sb->s_flags |= MS_RDONLY;
980 }
981
982 /*
983 * Read ufs_super_block into internal data structures
984 */
985 sb->s_op = &ufs_super_ops;
986 sb->dq_op = NULL; /***/
987 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
988
989 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
990 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
991 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
992 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
993 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
994 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
995
996 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
997 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
998 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
999 } else {
1000 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1001 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1002 }
1003
1004 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1005 /* s_bsize already set */
1006 /* s_fsize already set */
1007 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1008 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1009 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1010 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1011 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1012 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1013 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1014 uspi->s_fshift);
1015 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1016 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1017 /* s_sbsize already set */
1018 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1019 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1020 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1021 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1022 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1023 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1024 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1025 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1026
1027 if (uspi->fs_magic == UFS2_MAGIC)
1028 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1029 else
1030 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1031
1032 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1033 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1034 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1035 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1036 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1037 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1038 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1039 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1040 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1041 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1042 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1043 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1044 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1045 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1046
1047 /*
1048 * Compute another frequently used values
1049 */
1050 uspi->s_fpbmask = uspi->s_fpb - 1;
1051 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1052 uspi->s_apbshift = uspi->s_bshift - 3;
1053 else
1054 uspi->s_apbshift = uspi->s_bshift - 2;
1055
1056 uspi->s_2apbshift = uspi->s_apbshift * 2;
1057 uspi->s_3apbshift = uspi->s_apbshift * 3;
1058 uspi->s_apb = 1 << uspi->s_apbshift;
1059 uspi->s_2apb = 1 << uspi->s_2apbshift;
1060 uspi->s_3apb = 1 << uspi->s_3apbshift;
1061 uspi->s_apbmask = uspi->s_apb - 1;
1062 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1063 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1064 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1065 uspi->s_bpf = uspi->s_fsize << 3;
1066 uspi->s_bpfshift = uspi->s_fshift + 3;
1067 uspi->s_bpfmask = uspi->s_bpf - 1;
1068 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1069 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1070 uspi->s_maxsymlinklen =
1071 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1072
1073 if (uspi->fs_magic == UFS2_MAGIC)
1074 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1075 else
1076 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1077 if (uspi->s_maxsymlinklen > maxsymlen) {
1078 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1079 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1080 uspi->s_maxsymlinklen = maxsymlen;
1081 }
1082
1083 inode = ufs_iget(sb, UFS_ROOTINO);
1084 if (IS_ERR(inode)) {
1085 ret = PTR_ERR(inode);
1086 goto failed;
1087 }
1088 sb->s_root = d_alloc_root(inode);
1089 if (!sb->s_root) {
1090 ret = -ENOMEM;
1091 goto dalloc_failed;
1092 }
1093
1094 ufs_setup_cstotal(sb);
1095 /*
1096 * Read cylinder group structures
1097 */
1098 if (!(sb->s_flags & MS_RDONLY))
1099 if (!ufs_read_cylinder_structures(sb))
1100 goto failed;
1101
1102 UFSD("EXIT\n");
1103 return 0;
1104
1105 dalloc_failed:
1106 iput(inode);
1107 failed:
1108 if (ubh)
1109 ubh_brelse_uspi (uspi);
1110 kfree (uspi);
1111 kfree(sbi);
1112 sb->s_fs_info = NULL;
1113 UFSD("EXIT (FAILED)\n");
1114 return ret;
1115
1116 failed_nomem:
1117 UFSD("EXIT (NOMEM)\n");
1118 return -ENOMEM;
1119 }
1120
1121 static void ufs_write_super(struct super_block *sb)
1122 {
1123 struct ufs_sb_private_info * uspi;
1124 struct ufs_super_block_first * usb1;
1125 struct ufs_super_block_third * usb3;
1126 unsigned flags;
1127
1128 lock_kernel();
1129 UFSD("ENTER\n");
1130 flags = UFS_SB(sb)->s_flags;
1131 uspi = UFS_SB(sb)->s_uspi;
1132 usb1 = ubh_get_usb_first(uspi);
1133 usb3 = ubh_get_usb_third(uspi);
1134
1135 if (!(sb->s_flags & MS_RDONLY)) {
1136 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1137 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1138 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1139 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1140 ufs_set_fs_state(sb, usb1, usb3,
1141 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1142 ufs_put_cstotal(sb);
1143 }
1144 sb->s_dirt = 0;
1145 UFSD("EXIT\n");
1146 unlock_kernel();
1147 }
1148
1149 static void ufs_put_super(struct super_block *sb)
1150 {
1151 struct ufs_sb_info * sbi = UFS_SB(sb);
1152
1153 UFSD("ENTER\n");
1154
1155 if (!(sb->s_flags & MS_RDONLY))
1156 ufs_put_super_internal(sb);
1157
1158 ubh_brelse_uspi (sbi->s_uspi);
1159 kfree (sbi->s_uspi);
1160 kfree (sbi);
1161 sb->s_fs_info = NULL;
1162 UFSD("EXIT\n");
1163 return;
1164 }
1165
1166
1167 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1168 {
1169 struct ufs_sb_private_info * uspi;
1170 struct ufs_super_block_first * usb1;
1171 struct ufs_super_block_third * usb3;
1172 unsigned new_mount_opt, ufstype;
1173 unsigned flags;
1174
1175 uspi = UFS_SB(sb)->s_uspi;
1176 flags = UFS_SB(sb)->s_flags;
1177 usb1 = ubh_get_usb_first(uspi);
1178 usb3 = ubh_get_usb_third(uspi);
1179
1180 /*
1181 * Allow the "check" option to be passed as a remount option.
1182 * It is not possible to change ufstype option during remount
1183 */
1184 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1185 new_mount_opt = 0;
1186 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1187 if (!ufs_parse_options (data, &new_mount_opt))
1188 return -EINVAL;
1189 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1190 new_mount_opt |= ufstype;
1191 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1192 printk("ufstype can't be changed during remount\n");
1193 return -EINVAL;
1194 }
1195
1196 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1197 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1198 return 0;
1199 }
1200
1201 /*
1202 * fs was mouted as rw, remounting ro
1203 */
1204 if (*mount_flags & MS_RDONLY) {
1205 ufs_put_super_internal(sb);
1206 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1207 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1208 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1209 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1210 ufs_set_fs_state(sb, usb1, usb3,
1211 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1212 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1213 sb->s_dirt = 0;
1214 sb->s_flags |= MS_RDONLY;
1215 } else {
1216 /*
1217 * fs was mounted as ro, remounting rw
1218 */
1219 #ifndef CONFIG_UFS_FS_WRITE
1220 printk("ufs was compiled with read-only support, "
1221 "can't be mounted as read-write\n");
1222 return -EINVAL;
1223 #else
1224 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1225 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1226 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1227 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1228 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1229 printk("this ufstype is read-only supported\n");
1230 return -EINVAL;
1231 }
1232 if (!ufs_read_cylinder_structures(sb)) {
1233 printk("failed during remounting\n");
1234 return -EPERM;
1235 }
1236 sb->s_flags &= ~MS_RDONLY;
1237 #endif
1238 }
1239 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1240 return 0;
1241 }
1242
1243 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1244 {
1245 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1246 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1247 const struct match_token *tp = tokens;
1248
1249 while (tp->token != Opt_onerror_panic && tp->token != mval)
1250 ++tp;
1251 BUG_ON(tp->token == Opt_onerror_panic);
1252 seq_printf(seq, ",%s", tp->pattern);
1253
1254 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1255 while (tp->token != Opt_err && tp->token != mval)
1256 ++tp;
1257 BUG_ON(tp->token == Opt_err);
1258 seq_printf(seq, ",%s", tp->pattern);
1259
1260 return 0;
1261 }
1262
1263 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1264 {
1265 struct super_block *sb = dentry->d_sb;
1266 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1267 unsigned flags = UFS_SB(sb)->s_flags;
1268 struct ufs_super_block_first *usb1;
1269 struct ufs_super_block_second *usb2;
1270 struct ufs_super_block_third *usb3;
1271 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1272
1273 lock_kernel();
1274
1275 usb1 = ubh_get_usb_first(uspi);
1276 usb2 = ubh_get_usb_second(uspi);
1277 usb3 = ubh_get_usb_third(uspi);
1278
1279 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1280 buf->f_type = UFS2_MAGIC;
1281 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1282 } else {
1283 buf->f_type = UFS_MAGIC;
1284 buf->f_blocks = uspi->s_dsize;
1285 }
1286 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1287 uspi->cs_total.cs_nffree;
1288 buf->f_ffree = uspi->cs_total.cs_nifree;
1289 buf->f_bsize = sb->s_blocksize;
1290 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1291 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1292 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1293 buf->f_namelen = UFS_MAXNAMLEN;
1294 buf->f_fsid.val[0] = (u32)id;
1295 buf->f_fsid.val[1] = (u32)(id >> 32);
1296
1297 unlock_kernel();
1298
1299 return 0;
1300 }
1301
1302 static struct kmem_cache * ufs_inode_cachep;
1303
1304 static struct inode *ufs_alloc_inode(struct super_block *sb)
1305 {
1306 struct ufs_inode_info *ei;
1307 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1308 if (!ei)
1309 return NULL;
1310 ei->vfs_inode.i_version = 1;
1311 return &ei->vfs_inode;
1312 }
1313
1314 static void ufs_destroy_inode(struct inode *inode)
1315 {
1316 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1317 }
1318
1319 static void init_once(void *foo)
1320 {
1321 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1322
1323 inode_init_once(&ei->vfs_inode);
1324 }
1325
1326 static int init_inodecache(void)
1327 {
1328 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1329 sizeof(struct ufs_inode_info),
1330 0, (SLAB_RECLAIM_ACCOUNT|
1331 SLAB_MEM_SPREAD),
1332 init_once);
1333 if (ufs_inode_cachep == NULL)
1334 return -ENOMEM;
1335 return 0;
1336 }
1337
1338 static void destroy_inodecache(void)
1339 {
1340 kmem_cache_destroy(ufs_inode_cachep);
1341 }
1342
1343 #ifdef CONFIG_QUOTA
1344 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1345 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1346 #endif
1347
1348 static const struct super_operations ufs_super_ops = {
1349 .alloc_inode = ufs_alloc_inode,
1350 .destroy_inode = ufs_destroy_inode,
1351 .write_inode = ufs_write_inode,
1352 .delete_inode = ufs_delete_inode,
1353 .put_super = ufs_put_super,
1354 .write_super = ufs_write_super,
1355 .statfs = ufs_statfs,
1356 .remount_fs = ufs_remount,
1357 .show_options = ufs_show_options,
1358 #ifdef CONFIG_QUOTA
1359 .quota_read = ufs_quota_read,
1360 .quota_write = ufs_quota_write,
1361 #endif
1362 };
1363
1364 #ifdef CONFIG_QUOTA
1365
1366 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1367 * acquiring the locks... As quota files are never truncated and quota code
1368 * itself serializes the operations (and noone else should touch the files)
1369 * we don't have to be afraid of races */
1370 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1371 size_t len, loff_t off)
1372 {
1373 struct inode *inode = sb_dqopt(sb)->files[type];
1374 sector_t blk = off >> sb->s_blocksize_bits;
1375 int err = 0;
1376 int offset = off & (sb->s_blocksize - 1);
1377 int tocopy;
1378 size_t toread;
1379 struct buffer_head *bh;
1380 loff_t i_size = i_size_read(inode);
1381
1382 if (off > i_size)
1383 return 0;
1384 if (off+len > i_size)
1385 len = i_size-off;
1386 toread = len;
1387 while (toread > 0) {
1388 tocopy = sb->s_blocksize - offset < toread ?
1389 sb->s_blocksize - offset : toread;
1390
1391 bh = ufs_bread(inode, blk, 0, &err);
1392 if (err)
1393 return err;
1394 if (!bh) /* A hole? */
1395 memset(data, 0, tocopy);
1396 else {
1397 memcpy(data, bh->b_data+offset, tocopy);
1398 brelse(bh);
1399 }
1400 offset = 0;
1401 toread -= tocopy;
1402 data += tocopy;
1403 blk++;
1404 }
1405 return len;
1406 }
1407
1408 /* Write to quotafile */
1409 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1410 const char *data, size_t len, loff_t off)
1411 {
1412 struct inode *inode = sb_dqopt(sb)->files[type];
1413 sector_t blk = off >> sb->s_blocksize_bits;
1414 int err = 0;
1415 int offset = off & (sb->s_blocksize - 1);
1416 int tocopy;
1417 size_t towrite = len;
1418 struct buffer_head *bh;
1419
1420 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1421 while (towrite > 0) {
1422 tocopy = sb->s_blocksize - offset < towrite ?
1423 sb->s_blocksize - offset : towrite;
1424
1425 bh = ufs_bread(inode, blk, 1, &err);
1426 if (!bh)
1427 goto out;
1428 lock_buffer(bh);
1429 memcpy(bh->b_data+offset, data, tocopy);
1430 flush_dcache_page(bh->b_page);
1431 set_buffer_uptodate(bh);
1432 mark_buffer_dirty(bh);
1433 unlock_buffer(bh);
1434 brelse(bh);
1435 offset = 0;
1436 towrite -= tocopy;
1437 data += tocopy;
1438 blk++;
1439 }
1440 out:
1441 if (len == towrite) {
1442 mutex_unlock(&inode->i_mutex);
1443 return err;
1444 }
1445 if (inode->i_size < off+len-towrite)
1446 i_size_write(inode, off+len-towrite);
1447 inode->i_version++;
1448 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1449 mark_inode_dirty(inode);
1450 mutex_unlock(&inode->i_mutex);
1451 return len - towrite;
1452 }
1453
1454 #endif
1455
1456 static int ufs_get_sb(struct file_system_type *fs_type,
1457 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1458 {
1459 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1460 }
1461
1462 static struct file_system_type ufs_fs_type = {
1463 .owner = THIS_MODULE,
1464 .name = "ufs",
1465 .get_sb = ufs_get_sb,
1466 .kill_sb = kill_block_super,
1467 .fs_flags = FS_REQUIRES_DEV,
1468 };
1469
1470 static int __init init_ufs_fs(void)
1471 {
1472 int err = init_inodecache();
1473 if (err)
1474 goto out1;
1475 err = register_filesystem(&ufs_fs_type);
1476 if (err)
1477 goto out;
1478 return 0;
1479 out:
1480 destroy_inodecache();
1481 out1:
1482 return err;
1483 }
1484
1485 static void __exit exit_ufs_fs(void)
1486 {
1487 unregister_filesystem(&ufs_fs_type);
1488 destroy_inodecache();
1489 }
1490
1491 module_init(init_ufs_fs)
1492 module_exit(exit_ufs_fs)
1493 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards